robert/another-boids-in-rust
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Vendor dependencies for 0.3.0 release

Browse Source
This commit is contained in:
Robert Garrett
2025-09-27 10:29:08 -05:00
parent 0c8d39d483
commit 82ab7f317b
26803 changed files with 16134934 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
vendor/serde_derive/.cargo-checksum.json vendored Normal file
View File

@@ -0,0 +1 @@
{"files":{"Cargo.lock":"5f2b11f007c736d6808bedc1e4f3f0dbcded295e7147dfb6e7ff3cb74899e05c","Cargo.toml":"4335564e4668a50c76a9fbbb3fe049a2263589875f6ff77da949c8bb29fa2175","LICENSE-APACHE":"62c7a1e35f56406896d7aa7ca52d0cc0d272ac022b5d2796e7d6905db8a3636a","LICENSE-MIT":"23f18e03dc49df91622fe2a76176497404e46ced8a715d9d2b67a7446571cca3","README.md":"d40eb47c3c6e3780359df6fe40d40a35725c843df0e3b845e10ecf2a15048664","crates-io.md":"00b72e63d4f3393e28f9a219c8cb8c122013d82f0d10d6d551e239b13c5ba9e4","src/bound.rs":"eda458b2adf8d4b75eccba18621301f846e2a84a04ef2b54e7421f69574e24bc","src/de.rs":"08fc2db0db3e7263ccfb8999ecc6249e5a8c3d9d3a3b85ea3b8995e865f08c83","src/de/enum_.rs":"5a099a25034e4f9364d421a53cfb4428ea8a94fd66515c66207bf8bfb7c4db4f","src/de/enum_adjacently.rs":"3105e85ab86ece0483ac811da2dca41f8580ac59859719a6592c87bc1424d4b0","src/de/enum_externally.rs":"891e764f988cea31d63f9c7a78395ff66377c6b1b79c7339670322dd9d48993a","src/de/enum_internally.rs":"9d898dbc1c46262f695ef7ba1660b2af70de48e07bbac8f44b740326b7c5b303","src/de/enum_untagged.rs":"b66ad3cea36ee786d50270f6648f1075c1e615b5f04173b47f034a251df5220e","src/de/identifier.rs":"b653c26f4274e5c323e3f893c6f9a2b21bd5c873abdc2a801f0289a5e56a9f6c","src/de/struct_.rs":"7b26982ce59504a9bb5a18c3ab56eee2d75e70fd465774ff035d15c50452c118","src/de/tuple.rs":"5496ee711b935b17269960f4a0cfcb7d23de668db9489dfca7276ce1fcdf0f6f","src/de/unit.rs":"b792db7952fc2e4719fdce9552fe4ba1836086cc967ae9a5b919c28b30f2b4a0","src/deprecated.rs":"cff374e86ea5f134913a2a194a68d7c2510ffd5214956d10b9c496e90a20a952","src/dummy.rs":"dce9d53f7f6efb41043d6dbd741e03e65fe0a56b2f739a041184036cd7491b16","src/fragment.rs":"6757cb4c3131d4300f093572efc273c4ab5a20e3e1efb54a311dcfa52d0bd6eb","src/internals/ast.rs":"b170c3b6a1afd72e01b461f6f802b00056baf998a24a1f5c421cad60ef8daa71","src/internals/attr.rs":"29d42a925ecff984643b79e6f4f10964e85121a2f6a971b5ba03ce719a8ca3c8","src/internals/case.rs":"10c8dda2b32d8c6c6b63cf09cdc63d02375af7e95ecefe8fecb34f93b65191bb","src/internals/check.rs":"86ea817316638ec33f70ecdf9634a31c934fd3df84533e3e315816dc130f0bff","src/internals/ctxt.rs":"83a4e6fbe0e439d578478883594407e03f2f340541be479bdf0b04a202633a37","src/internals/mod.rs":"c1ece6bbce5a5e8a2bf5d6d9a29e85551258db9c610fab73ac19c6b7d8cf98fd","src/internals/name.rs":"9bc1553d7b493794cd436664ee6b43fccb914f271fa86705ae2937ae923a876f","src/internals/receiver.rs":"901c12f5b5d3935f2757f4cfcb05f4fcdb36a2520f62167679410099e44510c0","src/internals/respan.rs":"899753859c58ce5f532a3ec4584796a52f13ed5a0533191e48c953ba5c1b52ff","src/internals/symbol.rs":"d2590f1c8356d6a10923476b558c39a85b77392ba09c92fa97e05e2c403e73c7","src/lib.rs":"02f52a909afba546e929f8341ca8cb6f13f65f7337c79c376ea7d5899245fe02","src/pretend.rs":"e13e44242c5c0a805ddc6ce51762bb44367b5ed08ba04eabfcb207ea5c474d4e","src/ser.rs":"d43be68a3c1d5d4617c30baebe06aceeaf012097ffa343102328ff94349e35e9","src/this.rs":"87818dc80cbb521b51938a653d09daf10aafc220bb10425948de82ad670fcb85"},"package":"51e694923b8824cf0e9b382adf0f60d4e05f348f357b38833a3fa5ed7c2ede04"}

77
vendor/serde_derive/Cargo.lock generated vendored Normal file
View File

@@ -0,0 +1,77 @@
# This file is automatically @generated by Cargo.
# It is not intended for manual editing.
version = 3
[[package]]
name = "proc-macro2"
version = "1.0.101"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "89ae43fd86e4158d6db51ad8e2b80f313af9cc74f5c0e03ccb87de09998732de"
dependencies = [
"unicode-ident",
]
[[package]]
name = "quote"
version = "1.0.40"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "1885c039570dc00dcb4ff087a89e185fd56bae234ddc7f056a945bf36467248d"
dependencies = [
"proc-macro2",
]
[[package]]
name = "serde"
version = "1.0.226"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "0dca6411025b24b60bfa7ec1fe1f8e710ac09782dca409ee8237ba74b51295fd"
dependencies = [
"serde_core",
]
[[package]]
name = "serde_core"
version = "1.0.226"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ba2ba63999edb9dac981fb34b3e5c0d111a69b0924e253ed29d83f7c99e966a4"
dependencies = [
"serde_derive 1.0.226",
]
[[package]]
name = "serde_derive"
version = "1.0.226"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "8db53ae22f34573731bafa1db20f04027b2d25e02d8205921b569171699cdb33"
dependencies = [
"proc-macro2",
"quote",
"syn",
]
[[package]]
name = "serde_derive"
version = "1.0.227"
dependencies = [
"proc-macro2",
"quote",
"serde",
"syn",
]
[[package]]
name = "syn"
version = "2.0.106"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "ede7c438028d4436d71104916910f5bb611972c5cfd7f89b8300a8186e6fada6"
dependencies = [
"proc-macro2",
"quote",
"unicode-ident",
]
[[package]]
name = "unicode-ident"
version = "1.0.19"
source = "registry+https://github.com/rust-lang/crates.io-index"
checksum = "f63a545481291138910575129486daeaf8ac54aee4387fe7906919f7830c7d9d"

87
vendor/serde_derive/Cargo.toml vendored Normal file
View File

@@ -0,0 +1,87 @@
# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.
[package]
edition = "2021"
rust-version = "1.61"
name = "serde_derive"
version = "1.0.227"
authors = [
"Erick Tryzelaar <erick.tryzelaar@gmail.com>",
"David Tolnay <dtolnay@gmail.com>",
]
build = false
exclude = ["build.rs"]
autolib = false
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = "Macros 1.1 implementation of #[derive(Serialize, Deserialize)]"
homepage = "https://serde.rs"
documentation = "https://serde.rs/derive.html"
readme = "crates-io.md"
keywords = [
"serde",
"serialization",
"no_std",
"derive",
]
categories = [
"no-std",
"no-std::no-alloc",
]
license = "MIT OR Apache-2.0"
repository = "https://github.com/serde-rs/serde"
[package.metadata.docs.rs]
targets = ["x86_64-unknown-linux-gnu"]
rustdoc-args = [
"--generate-link-to-definition",
"--generate-macro-expansion",
"--extern-html-root-url=core=https://doc.rust-lang.org",
"--extern-html-root-url=alloc=https://doc.rust-lang.org",
"--extern-html-root-url=std=https://doc.rust-lang.org",
"--extern-html-root-url=proc_macro=https://doc.rust-lang.org",
]
[features]
default = []
deserialize_in_place = []
[lib]
name = "serde_derive"
path = "src/lib.rs"
proc-macro = true
[dependencies.proc-macro2]
version = "1.0.74"
features = ["proc-macro"]
default-features = false
[dependencies.quote]
version = "1.0.35"
features = ["proc-macro"]
default-features = false
[dependencies.syn]
version = "2.0.81"
features = [
"clone-impls",
"derive",
"parsing",
"printing",
"proc-macro",
]
default-features = false
[dev-dependencies.serde]
version = "1"

176
vendor/serde_derive/LICENSE-APACHE vendored Normal file
View File

@@ -0,0 +1,176 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS

23
vendor/serde_derive/LICENSE-MIT vendored Normal file
View File

@@ -0,0 +1,23 @@
Permission is hereby granted, free of charge, to any
person obtaining a copy of this software and associated
documentation files (the "Software"), to deal in the
Software without restriction, including without
limitation the rights to use, copy, modify, merge,
publish, distribute, sublicense, and/or sell copies of
the Software, and to permit persons to whom the Software
is furnished to do so, subject to the following
conditions:
The above copyright notice and this permission notice
shall be included in all copies or substantial portions
of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
DEALINGS IN THE SOFTWARE.

114
vendor/serde_derive/README.md vendored Normal file
View File

@@ -0,0 +1,114 @@
# Serde &emsp; [![Build Status]][actions] [![Latest Version]][crates.io] [![serde msrv]][Rust 1.56] [![serde_derive msrv]][Rust 1.61]
[Build Status]: https://img.shields.io/github/actions/workflow/status/serde-rs/serde/ci.yml?branch=master
[actions]: https://github.com/serde-rs/serde/actions?query=branch%3Amaster
[Latest Version]: https://img.shields.io/crates/v/serde.svg
[crates.io]: https://crates.io/crates/serde
[serde msrv]: https://img.shields.io/crates/msrv/serde.svg?label=serde%20msrv&color=lightgray
[serde_derive msrv]: https://img.shields.io/crates/msrv/serde_derive.svg?label=serde_derive%20msrv&color=lightgray
[Rust 1.56]: https://blog.rust-lang.org/2021/10/21/Rust-1.56.0.html
[Rust 1.61]: https://blog.rust-lang.org/2022/05/19/Rust-1.61.0.html
**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
---
You may be looking for:
- [An overview of Serde](https://serde.rs)
- [Data formats supported by Serde](https://serde.rs/#data-formats)
- [Setting up `#[derive(Serialize, Deserialize)]`](https://serde.rs/derive.html)
- [Examples](https://serde.rs/examples.html)
- [API documentation](https://docs.rs/serde)
- [Release notes](https://github.com/serde-rs/serde/releases)
## Serde in action
<details>
<summary>
Click to show Cargo.toml.
<a href="https://play.rust-lang.org/?edition=2021&gist=72755f28f99afc95e01d63174b28c1f5" target="_blank">Run this code in the playground.</a>
</summary>
```toml
[dependencies]
# The core APIs, including the Serialize and Deserialize traits. Always
# required when using Serde. The "derive" feature is only required when
# using #[derive(Serialize, Deserialize)] to make Serde work with structs
# and enums defined in your crate.
serde = { version = "1.0", features = ["derive"] }
# Each data format lives in its own crate; the sample code below uses JSON
# but you may be using a different one.
serde_json = "1.0"
```
</details>
<p></p>
```rust
use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Debug)]
struct Point {
x: i32,
y: i32,
}
fn main() {
let point = Point { x: 1, y: 2 };
// Convert the Point to a JSON string.
let serialized = serde_json::to_string(&point).unwrap();
// Prints serialized = {"x":1,"y":2}
println!("serialized = {}", serialized);
// Convert the JSON string back to a Point.
let deserialized: Point = serde_json::from_str(&serialized).unwrap();
// Prints deserialized = Point { x: 1, y: 2 }
println!("deserialized = {:?}", deserialized);
}
```
## Getting help
Serde is one of the most widely used Rust libraries so any place that Rustaceans
congregate will be able to help you out. For chat, consider trying the
[#rust-questions] or [#rust-beginners] channels of the unofficial community
Discord (invite: <https://discord.gg/rust-lang-community>), the [#rust-usage] or
[#beginners] channels of the official Rust Project Discord (invite:
<https://discord.gg/rust-lang>), or the [#general][zulip] stream in Zulip. For
asynchronous, consider the [\[rust\] tag on StackOverflow][stackoverflow], the
[/r/rust] subreddit which has a pinned weekly easy questions post, or the Rust
[Discourse forum][discourse]. It's acceptable to file a support issue in this
repo but they tend not to get as many eyes as any of the above and may get
closed without a response after some time.
[#rust-questions]: https://discord.com/channels/273534239310479360/274215136414400513
[#rust-beginners]: https://discord.com/channels/273534239310479360/273541522815713281
[#rust-usage]: https://discord.com/channels/442252698964721669/443150878111694848
[#beginners]: https://discord.com/channels/442252698964721669/448238009733742612
[zulip]: https://rust-lang.zulipchat.com/#narrow/stream/122651-general
[stackoverflow]: https://stackoverflow.com/questions/tagged/rust
[/r/rust]: https://www.reddit.com/r/rust
[discourse]: https://users.rust-lang.org
<br>
#### License
<sup>
Licensed under either of <a href="LICENSE-APACHE">Apache License, Version
2.0</a> or <a href="LICENSE-MIT">MIT license</a> at your option.
</sup>
<br>
<sub>
Unless you explicitly state otherwise, any contribution intentionally submitted
for inclusion in Serde by you, as defined in the Apache-2.0 license, shall be
dual licensed as above, without any additional terms or conditions.
</sub>

65
vendor/serde_derive/crates-io.md vendored Normal file
View File

@@ -0,0 +1,65 @@
<!-- Serde readme rendered on crates.io -->
**Serde is a framework for *ser*ializing and *de*serializing Rust data structures efficiently and generically.**
---
You may be looking for:
- [An overview of Serde](https://serde.rs)
- [Data formats supported by Serde](https://serde.rs/#data-formats)
- [Setting up `#[derive(Serialize, Deserialize)]`](https://serde.rs/derive.html)
- [Examples](https://serde.rs/examples.html)
- [API documentation](https://docs.rs/serde)
- [Release notes](https://github.com/serde-rs/serde/releases)
## Serde in action
```rust
use serde::{Deserialize, Serialize};
#[derive(Serialize, Deserialize, Debug)]
struct Point {
x: i32,
y: i32,
}
fn main() {
let point = Point { x: 1, y: 2 };
// Convert the Point to a JSON string.
let serialized = serde_json::to_string(&point).unwrap();
// Prints serialized = {"x":1,"y":2}
println!("serialized = {}", serialized);
// Convert the JSON string back to a Point.
let deserialized: Point = serde_json::from_str(&serialized).unwrap();
// Prints deserialized = Point { x: 1, y: 2 }
println!("deserialized = {:?}", deserialized);
}
```
## Getting help
Serde is one of the most widely used Rust libraries so any place that Rustaceans
congregate will be able to help you out. For chat, consider trying the
[#rust-questions] or [#rust-beginners] channels of the unofficial community
Discord (invite: <https://discord.gg/rust-lang-community>), the [#rust-usage]
or [#beginners] channels of the official Rust Project Discord (invite:
<https://discord.gg/rust-lang>), or the [#general][zulip] stream in Zulip. For
asynchronous, consider the [\[rust\] tag on StackOverflow][stackoverflow], the
[/r/rust] subreddit which has a pinned weekly easy questions post, or the Rust
[Discourse forum][discourse]. It's acceptable to file a support issue in this
repo but they tend not to get as many eyes as any of the above and may get
closed without a response after some time.
[#rust-questions]: https://discord.com/channels/273534239310479360/274215136414400513
[#rust-beginners]: https://discord.com/channels/273534239310479360/273541522815713281
[#rust-usage]: https://discord.com/channels/442252698964721669/443150878111694848
[#beginners]: https://discord.com/channels/442252698964721669/448238009733742612
[zulip]: https://rust-lang.zulipchat.com/#narrow/stream/122651-general
[stackoverflow]: https://stackoverflow.com/questions/tagged/rust
[/r/rust]: https://www.reddit.com/r/rust
[discourse]: https://users.rust-lang.org

410
vendor/serde_derive/src/bound.rs vendored Normal file
View File

@@ -0,0 +1,410 @@
use crate::internals::ast::{Container, Data};
use crate::internals::{attr, ungroup};
use proc_macro2::Span;
use std::collections::HashSet;
use syn::punctuated::{Pair, Punctuated};
use syn::Token;
// Remove the default from every type parameter because in the generated impls
// they look like associated types: "error: associated type bindings are not
// allowed here".
pub fn without_defaults(generics: &syn::Generics) -> syn::Generics {
syn::Generics {
params: generics
.params
.iter()
.map(|param| match param {
syn::GenericParam::Type(param) => syn::GenericParam::Type(syn::TypeParam {
eq_token: None,
default: None,
..param.clone()
}),
_ => param.clone(),
})
.collect(),
..generics.clone()
}
}
pub fn with_where_predicates(
generics: &syn::Generics,
predicates: &[syn::WherePredicate],
) -> syn::Generics {
let mut generics = generics.clone();
generics
.make_where_clause()
.predicates
.extend(predicates.iter().cloned());
generics
}
pub fn with_where_predicates_from_fields(
cont: &Container,
generics: &syn::Generics,
from_field: fn(&attr::Field) -> Option<&[syn::WherePredicate]>,
) -> syn::Generics {
let predicates = cont
.data
.all_fields()
.filter_map(|field| from_field(&field.attrs))
.flat_map(<[syn::WherePredicate]>::to_vec);
let mut generics = generics.clone();
generics.make_where_clause().predicates.extend(predicates);
generics
}
pub fn with_where_predicates_from_variants(
cont: &Container,
generics: &syn::Generics,
from_variant: fn(&attr::Variant) -> Option<&[syn::WherePredicate]>,
) -> syn::Generics {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => {
return generics.clone();
}
};
let predicates = variants
.iter()
.filter_map(|variant| from_variant(&variant.attrs))
.flat_map(<[syn::WherePredicate]>::to_vec);
let mut generics = generics.clone();
generics.make_where_clause().predicates.extend(predicates);
generics
}
// Puts the given bound on any generic type parameters that are used in fields
// for which filter returns true.
//
// For example, the following struct needs the bound `A: Serialize, B:
// Serialize`.
//
// struct S<'b, A, B: 'b, C> {
// a: A,
// b: Option<&'b B>
// #[serde(skip_serializing)]
// c: C,
// }
pub fn with_bound(
cont: &Container,
generics: &syn::Generics,
filter: fn(&attr::Field, Option<&attr::Variant>) -> bool,
bound: &syn::Path,
) -> syn::Generics {
struct FindTyParams<'ast> {
// Set of all generic type parameters on the current struct (A, B, C in
// the example). Initialized up front.
all_type_params: HashSet<syn::Ident>,
// Set of generic type parameters used in fields for which filter
// returns true (A and B in the example). Filled in as the visitor sees
// them.
relevant_type_params: HashSet<syn::Ident>,
// Fields whose type is an associated type of one of the generic type
// parameters.
associated_type_usage: Vec<&'ast syn::TypePath>,
}
impl<'ast> FindTyParams<'ast> {
fn visit_field(&mut self, field: &'ast syn::Field) {
if let syn::Type::Path(ty) = ungroup(&field.ty) {
if let Some(Pair::Punctuated(t, _)) = ty.path.segments.pairs().next() {
if self.all_type_params.contains(&t.ident) {
self.associated_type_usage.push(ty);
}
}
}
self.visit_type(&field.ty);
}
fn visit_path(&mut self, path: &'ast syn::Path) {
if let Some(seg) = path.segments.last() {
if seg.ident == "PhantomData" {
// Hardcoded exception, because PhantomData<T> implements
// Serialize and Deserialize whether or not T implements it.
return;
}
}
if path.leading_colon.is_none() && path.segments.len() == 1 {
let id = &path.segments[0].ident;
if self.all_type_params.contains(id) {
self.relevant_type_params.insert(id.clone());
}
}
for segment in &path.segments {
self.visit_path_segment(segment);
}
}
// Everything below is simply traversing the syntax tree.
fn visit_type(&mut self, ty: &'ast syn::Type) {
match ty {
#![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
syn::Type::Array(ty) => self.visit_type(&ty.elem),
syn::Type::BareFn(ty) => {
for arg in &ty.inputs {
self.visit_type(&arg.ty);
}
self.visit_return_type(&ty.output);
}
syn::Type::Group(ty) => self.visit_type(&ty.elem),
syn::Type::ImplTrait(ty) => {
for bound in &ty.bounds {
self.visit_type_param_bound(bound);
}
}
syn::Type::Macro(ty) => self.visit_macro(&ty.mac),
syn::Type::Paren(ty) => self.visit_type(&ty.elem),
syn::Type::Path(ty) => {
if let Some(qself) = &ty.qself {
self.visit_type(&qself.ty);
}
self.visit_path(&ty.path);
}
syn::Type::Ptr(ty) => self.visit_type(&ty.elem),
syn::Type::Reference(ty) => self.visit_type(&ty.elem),
syn::Type::Slice(ty) => self.visit_type(&ty.elem),
syn::Type::TraitObject(ty) => {
for bound in &ty.bounds {
self.visit_type_param_bound(bound);
}
}
syn::Type::Tuple(ty) => {
for elem in &ty.elems {
self.visit_type(elem);
}
}
syn::Type::Infer(_) | syn::Type::Never(_) | syn::Type::Verbatim(_) => {}
_ => {}
}
}
fn visit_path_segment(&mut self, segment: &'ast syn::PathSegment) {
self.visit_path_arguments(&segment.arguments);
}
fn visit_path_arguments(&mut self, arguments: &'ast syn::PathArguments) {
match arguments {
syn::PathArguments::None => {}
syn::PathArguments::AngleBracketed(arguments) => {
for arg in &arguments.args {
match arg {
#![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
syn::GenericArgument::Type(arg) => self.visit_type(arg),
syn::GenericArgument::AssocType(arg) => self.visit_type(&arg.ty),
syn::GenericArgument::Lifetime(_)
| syn::GenericArgument::Const(_)
| syn::GenericArgument::AssocConst(_)
| syn::GenericArgument::Constraint(_) => {}
_ => {}
}
}
}
syn::PathArguments::Parenthesized(arguments) => {
for argument in &arguments.inputs {
self.visit_type(argument);
}
self.visit_return_type(&arguments.output);
}
}
}
fn visit_return_type(&mut self, return_type: &'ast syn::ReturnType) {
match return_type {
syn::ReturnType::Default => {}
syn::ReturnType::Type(_, output) => self.visit_type(output),
}
}
fn visit_type_param_bound(&mut self, bound: &'ast syn::TypeParamBound) {
match bound {
#![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
syn::TypeParamBound::Trait(bound) => self.visit_path(&bound.path),
syn::TypeParamBound::Lifetime(_)
| syn::TypeParamBound::PreciseCapture(_)
| syn::TypeParamBound::Verbatim(_) => {}
_ => {}
}
}
// Type parameter should not be considered used by a macro path.
//
// struct TypeMacro<T> {
// mac: T!(),
// marker: PhantomData<T>,
// }
fn visit_macro(&mut self, _mac: &'ast syn::Macro) {}
}
let all_type_params = generics
.type_params()
.map(|param| param.ident.clone())
.collect();
let mut visitor = FindTyParams {
all_type_params,
relevant_type_params: HashSet::new(),
associated_type_usage: Vec::new(),
};
match &cont.data {
Data::Enum(variants) => {
for variant in variants {
let relevant_fields = variant
.fields
.iter()
.filter(|field| filter(&field.attrs, Some(&variant.attrs)));
for field in relevant_fields {
visitor.visit_field(field.original);
}
}
}
Data::Struct(_, fields) => {
for field in fields.iter().filter(|field| filter(&field.attrs, None)) {
visitor.visit_field(field.original);
}
}
}
let relevant_type_params = visitor.relevant_type_params;
let associated_type_usage = visitor.associated_type_usage;
let new_predicates = generics
.type_params()
.map(|param| param.ident.clone())
.filter(|id| relevant_type_params.contains(id))
.map(|id| syn::TypePath {
qself: None,
path: id.into(),
})
.chain(associated_type_usage.into_iter().cloned())
.map(|bounded_ty| {
syn::WherePredicate::Type(syn::PredicateType {
lifetimes: None,
// the type parameter that is being bounded e.g. T
bounded_ty: syn::Type::Path(bounded_ty),
colon_token: <Token![:]>::default(),
// the bound e.g. Serialize
bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
paren_token: None,
modifier: syn::TraitBoundModifier::None,
lifetimes: None,
path: bound.clone(),
})]
.into_iter()
.collect(),
})
});
let mut generics = generics.clone();
generics
.make_where_clause()
.predicates
.extend(new_predicates);
generics
}
pub fn with_self_bound(
cont: &Container,
generics: &syn::Generics,
bound: &syn::Path,
) -> syn::Generics {
let mut generics = generics.clone();
generics
.make_where_clause()
.predicates
.push(syn::WherePredicate::Type(syn::PredicateType {
lifetimes: None,
// the type that is being bounded e.g. MyStruct<'a, T>
bounded_ty: type_of_item(cont),
colon_token: <Token![:]>::default(),
// the bound e.g. Default
bounds: vec![syn::TypeParamBound::Trait(syn::TraitBound {
paren_token: None,
modifier: syn::TraitBoundModifier::None,
lifetimes: None,
path: bound.clone(),
})]
.into_iter()
.collect(),
}));
generics
}
pub fn with_lifetime_bound(generics: &syn::Generics, lifetime: &str) -> syn::Generics {
let bound = syn::Lifetime::new(lifetime, Span::call_site());
let def = syn::LifetimeParam {
attrs: Vec::new(),
lifetime: bound.clone(),
colon_token: None,
bounds: Punctuated::new(),
};
let params = Some(syn::GenericParam::Lifetime(def))
.into_iter()
.chain(generics.params.iter().cloned().map(|mut param| {
match &mut param {
syn::GenericParam::Lifetime(param) => {
param.bounds.push(bound.clone());
}
syn::GenericParam::Type(param) => {
param
.bounds
.push(syn::TypeParamBound::Lifetime(bound.clone()));
}
syn::GenericParam::Const(_) => {}
}
param
}))
.collect();
syn::Generics {
params,
..generics.clone()
}
}
fn type_of_item(cont: &Container) -> syn::Type {
syn::Type::Path(syn::TypePath {
qself: None,
path: syn::Path {
leading_colon: None,
segments: vec![syn::PathSegment {
ident: cont.ident.clone(),
arguments: syn::PathArguments::AngleBracketed(
syn::AngleBracketedGenericArguments {
colon2_token: None,
lt_token: <Token![<]>::default(),
args: cont
.generics
.params
.iter()
.map(|param| match param {
syn::GenericParam::Type(param) => {
syn::GenericArgument::Type(syn::Type::Path(syn::TypePath {
qself: None,
path: param.ident.clone().into(),
}))
}
syn::GenericParam::Lifetime(param) => {
syn::GenericArgument::Lifetime(param.lifetime.clone())
}
syn::GenericParam::Const(_) => {
panic!("Serde does not support const generics yet");
}
})
.collect(),
gt_token: <Token![>]>::default(),
},
),
}]
.into_iter()
.collect(),
},
})
}

973
vendor/serde_derive/src/de.rs vendored Normal file
View File

@@ -0,0 +1,973 @@
use crate::deprecated::allow_deprecated;
use crate::fragment::{Expr, Fragment, Stmts};
use crate::internals::ast::{Container, Data, Field, Style, Variant};
use crate::internals::name::Name;
use crate::internals::{attr, replace_receiver, ungroup, Ctxt, Derive};
use crate::{bound, dummy, pretend, private, this};
use proc_macro2::{Span, TokenStream};
use quote::{quote, quote_spanned, ToTokens};
use std::collections::BTreeSet;
use std::ptr;
use syn::punctuated::Punctuated;
use syn::spanned::Spanned;
use syn::{parse_quote, Ident, Index, Member};
mod enum_;
mod enum_adjacently;
mod enum_externally;
mod enum_internally;
mod enum_untagged;
mod identifier;
mod struct_;
mod tuple;
mod unit;
pub fn expand_derive_deserialize(input: &mut syn::DeriveInput) -> syn::Result<TokenStream> {
replace_receiver(input);
let ctxt = Ctxt::new();
let cont = match Container::from_ast(&ctxt, input, Derive::Deserialize, &private.ident()) {
Some(cont) => cont,
None => return Err(ctxt.check().unwrap_err()),
};
precondition(&ctxt, &cont);
ctxt.check()?;
let ident = &cont.ident;
let params = Parameters::new(&cont);
let (de_impl_generics, _, ty_generics, where_clause) = params.generics_with_de_lifetime();
let body = Stmts(deserialize_body(&cont, &params));
let delife = params.borrowed.de_lifetime();
let allow_deprecated = allow_deprecated(input);
let impl_block = if let Some(remote) = cont.attrs.remote() {
let vis = &input.vis;
let used = pretend::pretend_used(&cont, params.is_packed);
quote! {
#[automatically_derived]
#allow_deprecated
impl #de_impl_generics #ident #ty_generics #where_clause {
#vis fn deserialize<__D>(__deserializer: __D) -> _serde::#private::Result<#remote #ty_generics, __D::Error>
where
__D: _serde::Deserializer<#delife>,
{
#used
#body
}
}
}
} else {
let fn_deserialize_in_place = deserialize_in_place_body(&cont, &params);
quote! {
#[automatically_derived]
#allow_deprecated
impl #de_impl_generics _serde::Deserialize<#delife> for #ident #ty_generics #where_clause {
fn deserialize<__D>(__deserializer: __D) -> _serde::#private::Result<Self, __D::Error>
where
__D: _serde::Deserializer<#delife>,
{
#body
}
#fn_deserialize_in_place
}
}
};
Ok(dummy::wrap_in_const(
cont.attrs.custom_serde_path(),
impl_block,
))
}
fn precondition(cx: &Ctxt, cont: &Container) {
precondition_sized(cx, cont);
precondition_no_de_lifetime(cx, cont);
}
fn precondition_sized(cx: &Ctxt, cont: &Container) {
if let Data::Struct(_, fields) = &cont.data {
if let Some(last) = fields.last() {
if let syn::Type::Slice(_) = ungroup(last.ty) {
cx.error_spanned_by(
cont.original,
"cannot deserialize a dynamically sized struct",
);
}
}
}
}
fn precondition_no_de_lifetime(cx: &Ctxt, cont: &Container) {
if let BorrowedLifetimes::Borrowed(_) = borrowed_lifetimes(cont) {
for param in cont.generics.lifetimes() {
if param.lifetime.to_string() == "'de" {
cx.error_spanned_by(
&param.lifetime,
"cannot deserialize when there is a lifetime parameter called 'de",
);
return;
}
}
}
}
struct Parameters {
/// Name of the type the `derive` is on.
local: syn::Ident,
/// Path to the type the impl is for. Either a single `Ident` for local
/// types (does not include generic parameters) or `some::remote::Path` for
/// remote types.
this_type: syn::Path,
/// Same as `this_type` but using `::<T>` for generic parameters for use in
/// expression position.
this_value: syn::Path,
/// Generics including any explicit and inferred bounds for the impl.
generics: syn::Generics,
/// Lifetimes borrowed from the deserializer. These will become bounds on
/// the `'de` lifetime of the deserializer.
borrowed: BorrowedLifetimes,
/// At least one field has a serde(getter) attribute, implying that the
/// remote type has a private field.
has_getter: bool,
/// Type has a repr(packed) attribute.
is_packed: bool,
}
impl Parameters {
fn new(cont: &Container) -> Self {
let local = cont.ident.clone();
let this_type = this::this_type(cont);
let this_value = this::this_value(cont);
let borrowed = borrowed_lifetimes(cont);
let generics = build_generics(cont, &borrowed);
let has_getter = cont.data.has_getter();
let is_packed = cont.attrs.is_packed();
Parameters {
local,
this_type,
this_value,
generics,
borrowed,
has_getter,
is_packed,
}
}
/// Type name to use in error messages and `&'static str` arguments to
/// various Deserializer methods.
fn type_name(&self) -> String {
self.this_type.segments.last().unwrap().ident.to_string()
}
/// Split the data structure's generics into the pieces to use for its
/// `Deserialize` impl, augmented with an additional `'de` lifetime for use
/// as the `Deserialize` trait's lifetime.
fn generics_with_de_lifetime(
&self,
) -> (
DeImplGenerics,
DeTypeGenerics,
syn::TypeGenerics,
Option<&syn::WhereClause>,
) {
let de_impl_generics = DeImplGenerics(self);
let de_ty_generics = DeTypeGenerics(self);
let (_, ty_generics, where_clause) = self.generics.split_for_impl();
(de_impl_generics, de_ty_generics, ty_generics, where_clause)
}
}
// All the generics in the input, plus a bound `T: Deserialize` for each generic
// field type that will be deserialized by us, plus a bound `T: Default` for
// each generic field type that will be set to a default value.
fn build_generics(cont: &Container, borrowed: &BorrowedLifetimes) -> syn::Generics {
let generics = bound::without_defaults(cont.generics);
let generics = bound::with_where_predicates_from_fields(cont, &generics, attr::Field::de_bound);
let generics =
bound::with_where_predicates_from_variants(cont, &generics, attr::Variant::de_bound);
match cont.attrs.de_bound() {
Some(predicates) => bound::with_where_predicates(&generics, predicates),
None => {
let generics = match *cont.attrs.default() {
attr::Default::Default => bound::with_self_bound(
cont,
&generics,
&parse_quote!(_serde::#private::Default),
),
attr::Default::None | attr::Default::Path(_) => generics,
};
let delife = borrowed.de_lifetime();
let generics = bound::with_bound(
cont,
&generics,
needs_deserialize_bound,
&parse_quote!(_serde::Deserialize<#delife>),
);
bound::with_bound(
cont,
&generics,
requires_default,
&parse_quote!(_serde::#private::Default),
)
}
}
}
// Fields with a `skip_deserializing` or `deserialize_with` attribute, or which
// belong to a variant with a `skip_deserializing` or `deserialize_with`
// attribute, are not deserialized by us so we do not generate a bound. Fields
// with a `bound` attribute specify their own bound so we do not generate one.
// All other fields may need a `T: Deserialize` bound where T is the type of the
// field.
fn needs_deserialize_bound(field: &attr::Field, variant: Option<&attr::Variant>) -> bool {
!field.skip_deserializing()
&& field.deserialize_with().is_none()
&& field.de_bound().is_none()
&& variant.map_or(true, |variant| {
!variant.skip_deserializing()
&& variant.deserialize_with().is_none()
&& variant.de_bound().is_none()
})
}
// Fields with a `default` attribute (not `default=...`), and fields with a
// `skip_deserializing` attribute that do not also have `default=...`.
fn requires_default(field: &attr::Field, _variant: Option<&attr::Variant>) -> bool {
if let attr::Default::Default = *field.default() {
true
} else {
false
}
}
enum BorrowedLifetimes {
Borrowed(BTreeSet<syn::Lifetime>),
Static,
}
impl BorrowedLifetimes {
fn de_lifetime(&self) -> syn::Lifetime {
match *self {
BorrowedLifetimes::Borrowed(_) => syn::Lifetime::new("'de", Span::call_site()),
BorrowedLifetimes::Static => syn::Lifetime::new("'static", Span::call_site()),
}
}
fn de_lifetime_param(&self) -> Option<syn::LifetimeParam> {
match self {
BorrowedLifetimes::Borrowed(bounds) => Some(syn::LifetimeParam {
attrs: Vec::new(),
lifetime: syn::Lifetime::new("'de", Span::call_site()),
colon_token: None,
bounds: bounds.iter().cloned().collect(),
}),
BorrowedLifetimes::Static => None,
}
}
}
// The union of lifetimes borrowed by each field of the container.
//
// These turn into bounds on the `'de` lifetime of the Deserialize impl. If
// lifetimes `'a` and `'b` are borrowed but `'c` is not, the impl is:
//
// impl<'de: 'a + 'b, 'a, 'b, 'c> Deserialize<'de> for S<'a, 'b, 'c>
//
// If any borrowed lifetime is `'static`, then `'de: 'static` would be redundant
// and we use plain `'static` instead of `'de`.
fn borrowed_lifetimes(cont: &Container) -> BorrowedLifetimes {
let mut lifetimes = BTreeSet::new();
for field in cont.data.all_fields() {
if !field.attrs.skip_deserializing() {
lifetimes.extend(field.attrs.borrowed_lifetimes().iter().cloned());
}
}
if lifetimes.iter().any(|b| b.to_string() == "'static") {
BorrowedLifetimes::Static
} else {
BorrowedLifetimes::Borrowed(lifetimes)
}
}
fn deserialize_body(cont: &Container, params: &Parameters) -> Fragment {
if cont.attrs.transparent() {
deserialize_transparent(cont, params)
} else if let Some(type_from) = cont.attrs.type_from() {
deserialize_from(type_from)
} else if let Some(type_try_from) = cont.attrs.type_try_from() {
deserialize_try_from(type_try_from)
} else if let attr::Identifier::No = cont.attrs.identifier() {
match &cont.data {
Data::Enum(variants) => enum_::deserialize(params, variants, &cont.attrs),
Data::Struct(Style::Struct, fields) => {
struct_::deserialize(params, fields, &cont.attrs, StructForm::Struct)
}
Data::Struct(Style::Tuple, fields) | Data::Struct(Style::Newtype, fields) => {
tuple::deserialize(params, fields, &cont.attrs, TupleForm::Tuple)
}
Data::Struct(Style::Unit, _) => unit::deserialize(params, &cont.attrs),
}
} else {
match &cont.data {
Data::Enum(variants) => identifier::deserialize_custom(params, variants, &cont.attrs),
Data::Struct(_, _) => unreachable!("checked in serde_derive_internals"),
}
}
}
#[cfg(feature = "deserialize_in_place")]
fn deserialize_in_place_body(cont: &Container, params: &Parameters) -> Option<Stmts> {
// Only remote derives have getters, and we do not generate
// deserialize_in_place for remote derives.
assert!(!params.has_getter);
if cont.attrs.transparent()
|| cont.attrs.type_from().is_some()
|| cont.attrs.type_try_from().is_some()
|| cont.attrs.identifier().is_some()
|| cont
.data
.all_fields()
.all(|f| f.attrs.deserialize_with().is_some())
{
return None;
}
let code = match &cont.data {
Data::Struct(Style::Struct, fields) => {
struct_::deserialize_in_place(params, fields, &cont.attrs)?
}
Data::Struct(Style::Tuple, fields) | Data::Struct(Style::Newtype, fields) => {
tuple::deserialize_in_place(params, fields, &cont.attrs)
}
Data::Enum(_) | Data::Struct(Style::Unit, _) => {
return None;
}
};
let delife = params.borrowed.de_lifetime();
let stmts = Stmts(code);
let fn_deserialize_in_place = quote_block! {
fn deserialize_in_place<__D>(__deserializer: __D, __place: &mut Self) -> _serde::#private::Result<(), __D::Error>
where
__D: _serde::Deserializer<#delife>,
{
#stmts
}
};
Some(Stmts(fn_deserialize_in_place))
}
#[cfg(not(feature = "deserialize_in_place"))]
fn deserialize_in_place_body(_cont: &Container, _params: &Parameters) -> Option<Stmts> {
None
}
/// Generates `Deserialize::deserialize` body for a type with `#[serde(transparent)]` attribute
fn deserialize_transparent(cont: &Container, params: &Parameters) -> Fragment {
let fields = match &cont.data {
Data::Struct(_, fields) => fields,
Data::Enum(_) => unreachable!(),
};
let this_value = &params.this_value;
let transparent_field = fields.iter().find(|f| f.attrs.transparent()).unwrap();
let path = match transparent_field.attrs.deserialize_with() {
Some(path) => quote!(#path),
None => {
let span = transparent_field.original.span();
quote_spanned!(span=> _serde::Deserialize::deserialize)
}
};
let assign = fields.iter().map(|field| {
let member = &field.member;
if ptr::eq(field, transparent_field) {
quote!(#member: __transparent)
} else {
let value = match field.attrs.default() {
attr::Default::Default => quote!(_serde::#private::Default::default()),
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(default = "...")]
// ^^^^^
attr::Default::Path(path) => quote_spanned!(path.span()=> #path()),
attr::Default::None => quote!(_serde::#private::PhantomData),
};
quote!(#member: #value)
}
});
quote_block! {
_serde::#private::Result::map(
#path(__deserializer),
|__transparent| #this_value { #(#assign),* })
}
}
/// Generates `Deserialize::deserialize` body for a type with `#[serde(from)]` attribute
fn deserialize_from(type_from: &syn::Type) -> Fragment {
quote_block! {
_serde::#private::Result::map(
<#type_from as _serde::Deserialize>::deserialize(__deserializer),
_serde::#private::From::from)
}
}
/// Generates `Deserialize::deserialize` body for a type with `#[serde(try_from)]` attribute
fn deserialize_try_from(type_try_from: &syn::Type) -> Fragment {
quote_block! {
_serde::#private::Result::and_then(
<#type_try_from as _serde::Deserialize>::deserialize(__deserializer),
|v| _serde::#private::TryFrom::try_from(v).map_err(_serde::de::Error::custom))
}
}
enum TupleForm<'a> {
Tuple,
/// Contains a variant name
ExternallyTagged(&'a syn::Ident),
/// Contains a variant name
Untagged(&'a syn::Ident),
}
fn deserialize_seq(
type_path: &TokenStream,
params: &Parameters,
fields: &[Field],
is_struct: bool,
cattrs: &attr::Container,
expecting: &str,
) -> Fragment {
let vars = (0..fields.len()).map(field_i as fn(_) -> _);
let deserialized_count = fields
.iter()
.filter(|field| !field.attrs.skip_deserializing())
.count();
let expecting = if deserialized_count == 1 {
format!("{} with 1 element", expecting)
} else {
format!("{} with {} elements", expecting, deserialized_count)
};
let expecting = cattrs.expecting().unwrap_or(&expecting);
let mut index_in_seq = 0_usize;
let let_values = vars.clone().zip(fields).map(|(var, field)| {
if field.attrs.skip_deserializing() {
let default = Expr(expr_is_missing(field, cattrs));
quote! {
let #var = #default;
}
} else {
let visit = match field.attrs.deserialize_with() {
None => {
let field_ty = field.ty;
let span = field.original.span();
let func =
quote_spanned!(span=> _serde::de::SeqAccess::next_element::<#field_ty>);
quote!(#func(&mut __seq)?)
}
Some(path) => {
let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
quote!({
#wrapper
_serde::#private::Option::map(
_serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)?,
|__wrap| __wrap.value)
})
}
};
let value_if_none = expr_is_missing_seq(None, index_in_seq, field, cattrs, expecting);
let assign = quote! {
let #var = match #visit {
_serde::#private::Some(__value) => __value,
_serde::#private::None => #value_if_none,
};
};
index_in_seq += 1;
assign
}
});
let mut result = if is_struct {
let names = fields.iter().map(|f| &f.member);
quote! {
#type_path { #( #names: #vars ),* }
}
} else {
quote! {
#type_path ( #(#vars),* )
}
};
if params.has_getter {
let this_type = &params.this_type;
let (_, ty_generics, _) = params.generics.split_for_impl();
result = quote! {
_serde::#private::Into::<#this_type #ty_generics>::into(#result)
};
}
let let_default = match cattrs.default() {
attr::Default::Default => Some(quote!(
let __default: Self::Value = _serde::#private::Default::default();
)),
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(default = "...")]
// ^^^^^
attr::Default::Path(path) => Some(quote_spanned!(path.span()=>
let __default: Self::Value = #path();
)),
attr::Default::None => {
// We don't need the default value, to prevent an unused variable warning
// we'll leave the line empty.
None
}
};
quote_block! {
#let_default
#(#let_values)*
_serde::#private::Ok(#result)
}
}
#[cfg(feature = "deserialize_in_place")]
fn deserialize_seq_in_place(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
expecting: &str,
) -> Fragment {
let deserialized_count = fields
.iter()
.filter(|field| !field.attrs.skip_deserializing())
.count();
let expecting = if deserialized_count == 1 {
format!("{} with 1 element", expecting)
} else {
format!("{} with {} elements", expecting, deserialized_count)
};
let expecting = cattrs.expecting().unwrap_or(&expecting);
let mut index_in_seq = 0usize;
let write_values = fields.iter().map(|field| {
let member = &field.member;
if field.attrs.skip_deserializing() {
let default = Expr(expr_is_missing(field, cattrs));
quote! {
self.place.#member = #default;
}
} else {
let value_if_none = expr_is_missing_seq(Some(quote!(self.place.#member = )), index_in_seq, field, cattrs, expecting);
let write = match field.attrs.deserialize_with() {
None => {
quote! {
if let _serde::#private::None = _serde::de::SeqAccess::next_element_seed(&mut __seq,
_serde::#private::de::InPlaceSeed(&mut self.place.#member))?
{
#value_if_none;
}
}
}
Some(path) => {
let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
quote!({
#wrapper
match _serde::de::SeqAccess::next_element::<#wrapper_ty>(&mut __seq)? {
_serde::#private::Some(__wrap) => {
self.place.#member = __wrap.value;
}
_serde::#private::None => {
#value_if_none;
}
}
})
}
};
index_in_seq += 1;
write
}
});
let this_type = &params.this_type;
let (_, ty_generics, _) = params.generics.split_for_impl();
let let_default = match cattrs.default() {
attr::Default::Default => Some(quote!(
let __default: #this_type #ty_generics = _serde::#private::Default::default();
)),
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(default = "...")]
// ^^^^^
attr::Default::Path(path) => Some(quote_spanned!(path.span()=>
let __default: #this_type #ty_generics = #path();
)),
attr::Default::None => {
// We don't need the default value, to prevent an unused variable warning
// we'll leave the line empty.
None
}
};
quote_block! {
#let_default
#(#write_values)*
_serde::#private::Ok(())
}
}
enum StructForm<'a> {
Struct,
/// Contains a variant name
ExternallyTagged(&'a syn::Ident),
/// Contains a variant name
InternallyTagged(&'a syn::Ident),
/// Contains a variant name
Untagged(&'a syn::Ident),
}
struct FieldWithAliases<'a> {
ident: Ident,
aliases: &'a BTreeSet<Name>,
}
fn field_i(i: usize) -> Ident {
Ident::new(&format!("__field{}", i), Span::call_site())
}
/// This function wraps the expression in `#[serde(deserialize_with = "...")]`
/// in a trait to prevent it from accessing the internal `Deserialize` state.
fn wrap_deserialize_with(
params: &Parameters,
value_ty: &TokenStream,
deserialize_with: &syn::ExprPath,
) -> (TokenStream, TokenStream) {
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
let deserializer_var = quote!(__deserializer);
// If #deserialize_with returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(with = "...")]
// ^^^^^
let value = quote_spanned! {deserialize_with.span()=>
#deserialize_with(#deserializer_var)?
};
let wrapper = quote! {
#[doc(hidden)]
struct __DeserializeWith #de_impl_generics #where_clause {
value: #value_ty,
phantom: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::Deserialize<#delife> for __DeserializeWith #de_ty_generics #where_clause {
fn deserialize<__D>(#deserializer_var: __D) -> _serde::#private::Result<Self, __D::Error>
where
__D: _serde::Deserializer<#delife>,
{
_serde::#private::Ok(__DeserializeWith {
value: #value,
phantom: _serde::#private::PhantomData,
lifetime: _serde::#private::PhantomData,
})
}
}
};
let wrapper_ty = quote!(__DeserializeWith #de_ty_generics);
(wrapper, wrapper_ty)
}
fn wrap_deserialize_field_with(
params: &Parameters,
field_ty: &syn::Type,
deserialize_with: &syn::ExprPath,
) -> (TokenStream, TokenStream) {
wrap_deserialize_with(params, &quote!(#field_ty), deserialize_with)
}
// Generates closure that converts single input parameter to the final value.
fn unwrap_to_variant_closure(
params: &Parameters,
variant: &Variant,
with_wrapper: bool,
) -> TokenStream {
let this_value = &params.this_value;
let variant_ident = &variant.ident;
let (arg, wrapper) = if with_wrapper {
(quote! { __wrap }, quote! { __wrap.value })
} else {
let field_tys = variant.fields.iter().map(|field| field.ty);
(quote! { __wrap: (#(#field_tys),*) }, quote! { __wrap })
};
let field_access = (0..variant.fields.len()).map(|n| {
Member::Unnamed(Index {
index: n as u32,
span: Span::call_site(),
})
});
match variant.style {
Style::Struct if variant.fields.len() == 1 => {
let member = &variant.fields[0].member;
quote! {
|#arg| #this_value::#variant_ident { #member: #wrapper }
}
}
Style::Struct => {
let members = variant.fields.iter().map(|field| &field.member);
quote! {
|#arg| #this_value::#variant_ident { #(#members: #wrapper.#field_access),* }
}
}
Style::Tuple => quote! {
|#arg| #this_value::#variant_ident(#(#wrapper.#field_access),*)
},
Style::Newtype => quote! {
|#arg| #this_value::#variant_ident(#wrapper)
},
Style::Unit => quote! {
|#arg| #this_value::#variant_ident
},
}
}
fn expr_is_missing(field: &Field, cattrs: &attr::Container) -> Fragment {
match field.attrs.default() {
attr::Default::Default => {
let span = field.original.span();
let func = quote_spanned!(span=> _serde::#private::Default::default);
return quote_expr!(#func());
}
attr::Default::Path(path) => {
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(default = "...")]
// ^^^^^
return Fragment::Expr(quote_spanned!(path.span()=> #path()));
}
attr::Default::None => { /* below */ }
}
match *cattrs.default() {
attr::Default::Default | attr::Default::Path(_) => {
let member = &field.member;
return quote_expr!(__default.#member);
}
attr::Default::None => { /* below */ }
}
let name = field.attrs.name().deserialize_name();
match field.attrs.deserialize_with() {
None => {
let span = field.original.span();
let func = quote_spanned!(span=> _serde::#private::de::missing_field);
quote_expr! {
#func(#name)?
}
}
Some(_) => {
quote_expr! {
return _serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#name))
}
}
}
}
fn expr_is_missing_seq(
assign_to: Option<TokenStream>,
index: usize,
field: &Field,
cattrs: &attr::Container,
expecting: &str,
) -> TokenStream {
match field.attrs.default() {
attr::Default::Default => {
let span = field.original.span();
return quote_spanned!(span=> #assign_to _serde::#private::Default::default());
}
attr::Default::Path(path) => {
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(default = "...")]
// ^^^^^
return quote_spanned!(path.span()=> #assign_to #path());
}
attr::Default::None => { /* below */ }
}
match *cattrs.default() {
attr::Default::Default | attr::Default::Path(_) => {
let member = &field.member;
quote!(#assign_to __default.#member)
}
attr::Default::None => quote!(
return _serde::#private::Err(_serde::de::Error::invalid_length(#index, &#expecting))
),
}
}
fn effective_style(variant: &Variant) -> Style {
match variant.style {
Style::Newtype if variant.fields[0].attrs.skip_deserializing() => Style::Unit,
other => other,
}
}
/// True if there is any field with a `#[serde(flatten)]` attribute, other than
/// fields which are skipped.
fn has_flatten(fields: &[Field]) -> bool {
fields
.iter()
.any(|field| field.attrs.flatten() && !field.attrs.skip_deserializing())
}
struct DeImplGenerics<'a>(&'a Parameters);
#[cfg(feature = "deserialize_in_place")]
struct InPlaceImplGenerics<'a>(&'a Parameters);
impl<'a> ToTokens for DeImplGenerics<'a> {
fn to_tokens(&self, tokens: &mut TokenStream) {
let mut generics = self.0.generics.clone();
if let Some(de_lifetime) = self.0.borrowed.de_lifetime_param() {
generics.params = Some(syn::GenericParam::Lifetime(de_lifetime))
.into_iter()
.chain(generics.params)
.collect();
}
let (impl_generics, _, _) = generics.split_for_impl();
impl_generics.to_tokens(tokens);
}
}
#[cfg(feature = "deserialize_in_place")]
impl<'a> ToTokens for InPlaceImplGenerics<'a> {
fn to_tokens(&self, tokens: &mut TokenStream) {
let place_lifetime = place_lifetime();
let mut generics = self.0.generics.clone();
// Add lifetime for `&'place mut Self, and `'a: 'place`
for param in &mut generics.params {
match param {
syn::GenericParam::Lifetime(param) => {
param.bounds.push(place_lifetime.lifetime.clone());
}
syn::GenericParam::Type(param) => {
param.bounds.push(syn::TypeParamBound::Lifetime(
place_lifetime.lifetime.clone(),
));
}
syn::GenericParam::Const(_) => {}
}
}
generics.params = Some(syn::GenericParam::Lifetime(place_lifetime))
.into_iter()
.chain(generics.params)
.collect();
if let Some(de_lifetime) = self.0.borrowed.de_lifetime_param() {
generics.params = Some(syn::GenericParam::Lifetime(de_lifetime))
.into_iter()
.chain(generics.params)
.collect();
}
let (impl_generics, _, _) = generics.split_for_impl();
impl_generics.to_tokens(tokens);
}
}
#[cfg(feature = "deserialize_in_place")]
impl<'a> DeImplGenerics<'a> {
fn in_place(self) -> InPlaceImplGenerics<'a> {
InPlaceImplGenerics(self.0)
}
}
struct DeTypeGenerics<'a>(&'a Parameters);
#[cfg(feature = "deserialize_in_place")]
struct InPlaceTypeGenerics<'a>(&'a Parameters);
fn de_type_generics_to_tokens(
mut generics: syn::Generics,
borrowed: &BorrowedLifetimes,
tokens: &mut TokenStream,
) {
if borrowed.de_lifetime_param().is_some() {
let def = syn::LifetimeParam {
attrs: Vec::new(),
lifetime: syn::Lifetime::new("'de", Span::call_site()),
colon_token: None,
bounds: Punctuated::new(),
};
// Prepend 'de lifetime to list of generics
generics.params = Some(syn::GenericParam::Lifetime(def))
.into_iter()
.chain(generics.params)
.collect();
}
let (_, ty_generics, _) = generics.split_for_impl();
ty_generics.to_tokens(tokens);
}
impl<'a> ToTokens for DeTypeGenerics<'a> {
fn to_tokens(&self, tokens: &mut TokenStream) {
de_type_generics_to_tokens(self.0.generics.clone(), &self.0.borrowed, tokens);
}
}
#[cfg(feature = "deserialize_in_place")]
impl<'a> ToTokens for InPlaceTypeGenerics<'a> {
fn to_tokens(&self, tokens: &mut TokenStream) {
let mut generics = self.0.generics.clone();
generics.params = Some(syn::GenericParam::Lifetime(place_lifetime()))
.into_iter()
.chain(generics.params)
.collect();
de_type_generics_to_tokens(generics, &self.0.borrowed, tokens);
}
}
#[cfg(feature = "deserialize_in_place")]
impl<'a> DeTypeGenerics<'a> {
fn in_place(self) -> InPlaceTypeGenerics<'a> {
InPlaceTypeGenerics(self.0)
}
}
#[cfg(feature = "deserialize_in_place")]
fn place_lifetime() -> syn::LifetimeParam {
syn::LifetimeParam {
attrs: Vec::new(),
lifetime: syn::Lifetime::new("'place", Span::call_site()),
colon_token: None,
bounds: Punctuated::new(),
}
}

96
vendor/serde_derive/src/de/enum_.rs vendored Normal file
View File

@@ -0,0 +1,96 @@
use crate::de::enum_adjacently;
use crate::de::enum_externally;
use crate::de::enum_internally;
use crate::de::enum_untagged;
use crate::de::identifier;
use crate::de::{field_i, FieldWithAliases, Parameters};
use crate::fragment::{Expr, Fragment, Stmts};
use crate::internals::ast::Variant;
use crate::internals::attr;
use crate::private;
use proc_macro2::TokenStream;
use quote::quote;
/// Generates `Deserialize::deserialize` body for an `enum Enum {...}`
pub(super) fn deserialize(
params: &Parameters,
variants: &[Variant],
cattrs: &attr::Container,
) -> Fragment {
// The variants have already been checked (in ast.rs) that all untagged variants appear at the end
match variants.iter().position(|var| var.attrs.untagged()) {
Some(variant_idx) => {
let (tagged, untagged) = variants.split_at(variant_idx);
let tagged_frag = Expr(deserialize_homogeneous_enum(params, tagged, cattrs));
// Ignore any error associated with non-untagged deserialization so that we
// can fall through to the untagged variants. This may be infallible so we
// need to provide the error type.
let first_attempt = quote! {
if let _serde::#private::Result::<_, __D::Error>::Ok(__ok) = (|| #tagged_frag)() {
return _serde::#private::Ok(__ok);
}
};
enum_untagged::deserialize(params, untagged, cattrs, Some(first_attempt))
}
None => deserialize_homogeneous_enum(params, variants, cattrs),
}
}
fn deserialize_homogeneous_enum(
params: &Parameters,
variants: &[Variant],
cattrs: &attr::Container,
) -> Fragment {
match cattrs.tag() {
attr::TagType::External => enum_externally::deserialize(params, variants, cattrs),
attr::TagType::Internal { tag } => {
enum_internally::deserialize(params, variants, cattrs, tag)
}
attr::TagType::Adjacent { tag, content } => {
enum_adjacently::deserialize(params, variants, cattrs, tag, content)
}
attr::TagType::None => enum_untagged::deserialize(params, variants, cattrs, None),
}
}
pub fn prepare_enum_variant_enum(variants: &[Variant]) -> (TokenStream, Stmts) {
let deserialized_variants = variants
.iter()
.enumerate()
.filter(|&(_i, variant)| !variant.attrs.skip_deserializing());
let fallthrough = deserialized_variants
.clone()
.find(|(_i, variant)| variant.attrs.other())
.map(|(i, _variant)| {
let ignore_variant = field_i(i);
quote!(_serde::#private::Ok(__Field::#ignore_variant))
});
let variants_stmt = {
let variant_names = deserialized_variants
.clone()
.flat_map(|(_i, variant)| variant.attrs.aliases());
quote! {
#[doc(hidden)]
const VARIANTS: &'static [&'static str] = &[ #(#variant_names),* ];
}
};
let deserialized_variants: Vec<_> = deserialized_variants
.map(|(i, variant)| FieldWithAliases {
ident: field_i(i),
aliases: variant.attrs.aliases(),
})
.collect();
let variant_visitor = Stmts(identifier::deserialize_generated(
&deserialized_variants,
false, // variant identifiers do not depend on the presence of flatten fields
true,
None,
fallthrough,
));
(variants_stmt, variant_visitor)
}

323
vendor/serde_derive/src/de/enum_adjacently.rs vendored Normal file
View File

@@ -0,0 +1,323 @@
//! Deserialization for adjacently tagged enums:
//!
//! ```ignore
//! #[serde(tag = "...", content = "...")]
//! enum Enum {}
//! ```
use crate::de::enum_;
use crate::de::enum_untagged;
use crate::de::{field_i, Parameters};
use crate::fragment::{Fragment, Match};
use crate::internals::ast::{Style, Variant};
use crate::internals::attr;
use crate::private;
use quote::{quote, quote_spanned};
use syn::spanned::Spanned;
/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` with `#[serde(tag, content)]` attributes
pub(super) fn deserialize(
params: &Parameters,
variants: &[Variant],
cattrs: &attr::Container,
tag: &str,
content: &str,
) -> Fragment {
let this_type = &params.this_type;
let this_value = &params.this_value;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
let (variants_stmt, variant_visitor) = enum_::prepare_enum_variant_enum(variants);
let variant_arms: &Vec<_> = &variants
.iter()
.enumerate()
.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
.map(|(i, variant)| {
let variant_index = field_i(i);
let block = Match(enum_untagged::deserialize_variant(params, variant, cattrs));
quote! {
__Field::#variant_index => #block
}
})
.collect();
let rust_name = params.type_name();
let expecting = format!("adjacently tagged enum {}", rust_name);
let expecting = cattrs.expecting().unwrap_or(&expecting);
let type_name = cattrs.name().deserialize_name();
let deny_unknown_fields = cattrs.deny_unknown_fields();
// If unknown fields are allowed, we pick the visitor that can step over
// those. Otherwise we pick the visitor that fails on unknown keys.
let field_visitor_ty = if deny_unknown_fields {
quote! { _serde::#private::de::TagOrContentFieldVisitor }
} else {
quote! { _serde::#private::de::TagContentOtherFieldVisitor }
};
let mut missing_content = quote! {
_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#content))
};
let mut missing_content_fallthrough = quote!();
let missing_content_arms = variants
.iter()
.enumerate()
.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
.filter_map(|(i, variant)| {
let variant_index = field_i(i);
let variant_ident = &variant.ident;
let arm = match variant.style {
Style::Unit => quote! {
_serde::#private::Ok(#this_value::#variant_ident)
},
Style::Newtype if variant.attrs.deserialize_with().is_none() => {
let span = variant.original.span();
let func = quote_spanned!(span=> _serde::#private::de::missing_field);
quote! {
#func(#content).map(#this_value::#variant_ident)
}
}
_ => {
missing_content_fallthrough = quote!(_ => #missing_content);
return None;
}
};
Some(quote! {
__Field::#variant_index => #arm,
})
})
.collect::<Vec<_>>();
if !missing_content_arms.is_empty() {
missing_content = quote! {
match __field {
#(#missing_content_arms)*
#missing_content_fallthrough
}
};
}
// Advance the map by one key, returning early in case of error.
let next_key = quote! {
_serde::de::MapAccess::next_key_seed(&mut __map, #field_visitor_ty {
tag: #tag,
content: #content,
})?
};
let variant_from_map = quote! {
_serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::AdjacentlyTaggedEnumVariantSeed::<__Field> {
enum_name: #rust_name,
variants: VARIANTS,
fields_enum: _serde::#private::PhantomData
})?
};
// When allowing unknown fields, we want to transparently step through keys
// we don't care about until we find `tag`, `content`, or run out of keys.
let next_relevant_key = if deny_unknown_fields {
next_key
} else {
quote!({
let mut __rk : _serde::#private::Option<_serde::#private::de::TagOrContentField> = _serde::#private::None;
while let _serde::#private::Some(__k) = #next_key {
match __k {
_serde::#private::de::TagContentOtherField::Other => {
let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?;
continue;
},
_serde::#private::de::TagContentOtherField::Tag => {
__rk = _serde::#private::Some(_serde::#private::de::TagOrContentField::Tag);
break;
}
_serde::#private::de::TagContentOtherField::Content => {
__rk = _serde::#private::Some(_serde::#private::de::TagOrContentField::Content);
break;
}
}
}
__rk
})
};
// Step through remaining keys, looking for duplicates of previously-seen
// keys. When unknown fields are denied, any key that isn't a duplicate will
// at this point immediately produce an error.
let visit_remaining_keys = quote! {
match #next_relevant_key {
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
}
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
}
_serde::#private::None => _serde::#private::Ok(__ret),
}
};
let finish_content_then_tag = if variant_arms.is_empty() {
quote! {
match #variant_from_map {}
}
} else {
quote! {
let __seed = __Seed {
variant: #variant_from_map,
marker: _serde::#private::PhantomData,
lifetime: _serde::#private::PhantomData,
};
let __deserializer = _serde::#private::de::ContentDeserializer::<__A::Error>::new(__content);
let __ret = _serde::de::DeserializeSeed::deserialize(__seed, __deserializer)?;
// Visit remaining keys, looking for duplicates.
#visit_remaining_keys
}
};
quote_block! {
#variant_visitor
#variants_stmt
#[doc(hidden)]
struct __Seed #de_impl_generics #where_clause {
variant: __Field,
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::de::DeserializeSeed<#delife> for __Seed #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
fn deserialize<__D>(self, __deserializer: __D) -> _serde::#private::Result<Self::Value, __D::Error>
where
__D: _serde::Deserializer<#delife>,
{
match self.variant {
#(#variant_arms)*
}
}
}
#[doc(hidden)]
struct __Visitor #de_impl_generics #where_clause {
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
fn visit_map<__A>(self, mut __map: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::MapAccess<#delife>,
{
// Visit the first relevant key.
match #next_relevant_key {
// First key is the tag.
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
// Parse the tag.
let __field = #variant_from_map;
// Visit the second key.
match #next_relevant_key {
// Second key is a duplicate of the tag.
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#tag))
}
// Second key is the content.
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
let __ret = _serde::de::MapAccess::next_value_seed(&mut __map,
__Seed {
variant: __field,
marker: _serde::#private::PhantomData,
lifetime: _serde::#private::PhantomData,
})?;
// Visit remaining keys, looking for duplicates.
#visit_remaining_keys
}
// There is no second key; might be okay if the we have a unit variant.
_serde::#private::None => #missing_content
}
}
// First key is the content.
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
// Buffer up the content.
let __content = _serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::ContentVisitor::new())?;
// Visit the second key.
match #next_relevant_key {
// Second key is the tag.
_serde::#private::Some(_serde::#private::de::TagOrContentField::Tag) => {
#finish_content_then_tag
}
// Second key is a duplicate of the content.
_serde::#private::Some(_serde::#private::de::TagOrContentField::Content) => {
_serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#content))
}
// There is no second key.
_serde::#private::None => {
_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
}
}
}
// There is no first key.
_serde::#private::None => {
_serde::#private::Err(<__A::Error as _serde::de::Error>::missing_field(#tag))
}
}
}
fn visit_seq<__A>(self, mut __seq: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::SeqAccess<#delife>,
{
// Visit the first element - the tag.
match _serde::de::SeqAccess::next_element(&mut __seq)? {
_serde::#private::Some(__variant) => {
// Visit the second element - the content.
match _serde::de::SeqAccess::next_element_seed(
&mut __seq,
__Seed {
variant: __variant,
marker: _serde::#private::PhantomData,
lifetime: _serde::#private::PhantomData,
},
)? {
_serde::#private::Some(__ret) => _serde::#private::Ok(__ret),
// There is no second element.
_serde::#private::None => {
_serde::#private::Err(_serde::de::Error::invalid_length(1, &self))
}
}
}
// There is no first element.
_serde::#private::None => {
_serde::#private::Err(_serde::de::Error::invalid_length(0, &self))
}
}
}
}
#[doc(hidden)]
const FIELDS: &'static [&'static str] = &[#tag, #content];
_serde::Deserializer::deserialize_struct(
__deserializer,
#type_name,
FIELDS,
__Visitor {
marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData,
},
)
}
}

212
vendor/serde_derive/src/de/enum_externally.rs vendored Normal file
View File

@@ -0,0 +1,212 @@
//! Deserialization for externally tagged enums:
//!
//! ```ignore
//! enum Enum {}
//! ```
use crate::de::enum_;
use crate::de::struct_;
use crate::de::tuple;
use crate::de::{
expr_is_missing, field_i, unwrap_to_variant_closure, wrap_deserialize_field_with,
wrap_deserialize_with, Parameters, StructForm, TupleForm,
};
use crate::fragment::{Expr, Fragment, Match};
use crate::internals::ast::{Field, Style, Variant};
use crate::internals::attr;
use crate::private;
use proc_macro2::TokenStream;
use quote::{quote, quote_spanned};
use syn::spanned::Spanned;
/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` without additional attributes
pub(super) fn deserialize(
params: &Parameters,
variants: &[Variant],
cattrs: &attr::Container,
) -> Fragment {
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
let type_name = cattrs.name().deserialize_name();
let expecting = format!("enum {}", params.type_name());
let expecting = cattrs.expecting().unwrap_or(&expecting);
let (variants_stmt, variant_visitor) = enum_::prepare_enum_variant_enum(variants);
// Match arms to extract a variant from a string
let variant_arms = variants
.iter()
.enumerate()
.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
.map(|(i, variant)| {
let variant_name = field_i(i);
let block = Match(deserialize_externally_tagged_variant(
params, variant, cattrs,
));
quote! {
(__Field::#variant_name, __variant) => #block
}
});
let all_skipped = variants
.iter()
.all(|variant| variant.attrs.skip_deserializing());
let match_variant = if all_skipped {
// This is an empty enum like `enum Impossible {}` or an enum in which
// all variants have `#[serde(skip_deserializing)]`.
quote! {
// FIXME: Once feature(exhaustive_patterns) is stable:
// let _serde::#private::Err(__err) = _serde::de::EnumAccess::variant::<__Field>(__data);
// _serde::#private::Err(__err)
_serde::#private::Result::map(
_serde::de::EnumAccess::variant::<__Field>(__data),
|(__impossible, _)| match __impossible {})
}
} else {
quote! {
match _serde::de::EnumAccess::variant(__data)? {
#(#variant_arms)*
}
}
};
quote_block! {
#variant_visitor
#[doc(hidden)]
struct __Visitor #de_impl_generics #where_clause {
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
fn visit_enum<__A>(self, __data: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::EnumAccess<#delife>,
{
#match_variant
}
}
#variants_stmt
_serde::Deserializer::deserialize_enum(
__deserializer,
#type_name,
VARIANTS,
__Visitor {
marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData,
},
)
}
}
fn deserialize_externally_tagged_variant(
params: &Parameters,
variant: &Variant,
cattrs: &attr::Container,
) -> Fragment {
if let Some(path) = variant.attrs.deserialize_with() {
let (wrapper, wrapper_ty, unwrap_fn) = wrap_deserialize_variant_with(params, variant, path);
return quote_block! {
#wrapper
_serde::#private::Result::map(
_serde::de::VariantAccess::newtype_variant::<#wrapper_ty>(__variant), #unwrap_fn)
};
}
let variant_ident = &variant.ident;
match variant.style {
Style::Unit => {
let this_value = &params.this_value;
quote_block! {
_serde::de::VariantAccess::unit_variant(__variant)?;
_serde::#private::Ok(#this_value::#variant_ident)
}
}
Style::Newtype => deserialize_externally_tagged_newtype_variant(
variant_ident,
params,
&variant.fields[0],
cattrs,
),
Style::Tuple => tuple::deserialize(
params,
&variant.fields,
cattrs,
TupleForm::ExternallyTagged(variant_ident),
),
Style::Struct => struct_::deserialize(
params,
&variant.fields,
cattrs,
StructForm::ExternallyTagged(variant_ident),
),
}
}
fn wrap_deserialize_variant_with(
params: &Parameters,
variant: &Variant,
deserialize_with: &syn::ExprPath,
) -> (TokenStream, TokenStream, TokenStream) {
let field_tys = variant.fields.iter().map(|field| field.ty);
let (wrapper, wrapper_ty) =
wrap_deserialize_with(params, &quote!((#(#field_tys),*)), deserialize_with);
let unwrap_fn = unwrap_to_variant_closure(params, variant, true);
(wrapper, wrapper_ty, unwrap_fn)
}
fn deserialize_externally_tagged_newtype_variant(
variant_ident: &syn::Ident,
params: &Parameters,
field: &Field,
cattrs: &attr::Container,
) -> Fragment {
let this_value = &params.this_value;
if field.attrs.skip_deserializing() {
let default = Expr(expr_is_missing(field, cattrs));
return quote_block! {
_serde::de::VariantAccess::unit_variant(__variant)?;
_serde::#private::Ok(#this_value::#variant_ident(#default))
};
}
match field.attrs.deserialize_with() {
None => {
let field_ty = field.ty;
let span = field.original.span();
let func =
quote_spanned!(span=> _serde::de::VariantAccess::newtype_variant::<#field_ty>);
quote_expr! {
_serde::#private::Result::map(#func(__variant), #this_value::#variant_ident)
}
}
Some(path) => {
let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
quote_block! {
#wrapper
_serde::#private::Result::map(
_serde::de::VariantAccess::newtype_variant::<#wrapper_ty>(__variant),
|__wrapper| #this_value::#variant_ident(__wrapper.value))
}
}
}
}

106
vendor/serde_derive/src/de/enum_internally.rs vendored Normal file
View File

@@ -0,0 +1,106 @@
//! Deserialization for internally tagged enums:
//!
//! ```ignore
//! #[serde(tag = "...")]
//! enum Enum {}
//! ```
use crate::de::enum_;
use crate::de::enum_untagged;
use crate::de::struct_;
use crate::de::{
effective_style, expr_is_missing, field_i, unwrap_to_variant_closure, Parameters, StructForm,
};
use crate::fragment::{Expr, Fragment, Match};
use crate::internals::ast::{Style, Variant};
use crate::internals::attr;
use crate::private;
use quote::quote;
/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` with `#[serde(tag)]` attribute
pub(super) fn deserialize(
params: &Parameters,
variants: &[Variant],
cattrs: &attr::Container,
tag: &str,
) -> Fragment {
let (variants_stmt, variant_visitor) = enum_::prepare_enum_variant_enum(variants);
// Match arms to extract a variant from a string
let variant_arms = variants
.iter()
.enumerate()
.filter(|&(_, variant)| !variant.attrs.skip_deserializing())
.map(|(i, variant)| {
let variant_name = field_i(i);
let block = Match(deserialize_internally_tagged_variant(
params, variant, cattrs,
));
quote! {
__Field::#variant_name => #block
}
});
let expecting = format!("internally tagged enum {}", params.type_name());
let expecting = cattrs.expecting().unwrap_or(&expecting);
quote_block! {
#variant_visitor
#variants_stmt
let (__tag, __content) = _serde::Deserializer::deserialize_any(
__deserializer,
_serde::#private::de::TaggedContentVisitor::<__Field>::new(#tag, #expecting))?;
let __deserializer = _serde::#private::de::ContentDeserializer::<__D::Error>::new(__content);
match __tag {
#(#variant_arms)*
}
}
}
// Generates significant part of the visit_seq and visit_map bodies of visitors
// for the variants of internally tagged enum.
fn deserialize_internally_tagged_variant(
params: &Parameters,
variant: &Variant,
cattrs: &attr::Container,
) -> Fragment {
if let Some(path) = variant.attrs.deserialize_with() {
let unwrap_fn = unwrap_to_variant_closure(params, variant, false);
return quote_block! {
_serde::#private::Result::map(#path(__deserializer), #unwrap_fn)
};
}
let variant_ident = &variant.ident;
match effective_style(variant) {
Style::Unit => {
let this_value = &params.this_value;
let type_name = params.type_name();
let variant_name = variant.ident.to_string();
let default = variant.fields.first().map(|field| {
let default = Expr(expr_is_missing(field, cattrs));
quote!((#default))
});
quote_block! {
_serde::Deserializer::deserialize_any(__deserializer, _serde::#private::de::InternallyTaggedUnitVisitor::new(#type_name, #variant_name))?;
_serde::#private::Ok(#this_value::#variant_ident #default)
}
}
Style::Newtype => {
enum_untagged::deserialize_newtype_variant(variant_ident, params, &variant.fields[0])
}
Style::Struct => struct_::deserialize(
params,
&variant.fields,
cattrs,
StructForm::InternallyTagged(variant_ident),
),
Style::Tuple => unreachable!("checked in serde_derive_internals"),
}
}

135
vendor/serde_derive/src/de/enum_untagged.rs vendored Normal file
View File

@@ -0,0 +1,135 @@
//! Deserialization for untagged enums:
//!
//! ```ignore
//! #[serde(untagged)]
//! enum Enum {}
//! ```
use crate::de::struct_;
use crate::de::tuple;
use crate::de::{
effective_style, expr_is_missing, unwrap_to_variant_closure, Parameters, StructForm, TupleForm,
};
use crate::fragment::{Expr, Fragment};
use crate::internals::ast::{Field, Style, Variant};
use crate::internals::attr;
use crate::private;
use proc_macro2::TokenStream;
use quote::{quote, quote_spanned};
use syn::spanned::Spanned;
/// Generates `Deserialize::deserialize` body for an `enum Enum {...}` with `#[serde(untagged)]` attribute
pub(super) fn deserialize(
params: &Parameters,
variants: &[Variant],
cattrs: &attr::Container,
first_attempt: Option<TokenStream>,
) -> Fragment {
let attempts = variants
.iter()
.filter(|variant| !variant.attrs.skip_deserializing())
.map(|variant| Expr(deserialize_variant(params, variant, cattrs)));
// TODO this message could be better by saving the errors from the failed
// attempts. The heuristic used by TOML was to count the number of fields
// processed before an error, and use the error that happened after the
// largest number of fields. I'm not sure I like that. Maybe it would be
// better to save all the errors and combine them into one message that
// explains why none of the variants matched.
let fallthrough_msg = format!(
"data did not match any variant of untagged enum {}",
params.type_name()
);
let fallthrough_msg = cattrs.expecting().unwrap_or(&fallthrough_msg);
let private2 = private;
quote_block! {
let __content = _serde::de::DeserializeSeed::deserialize(_serde::#private::de::ContentVisitor::new(), __deserializer)?;
let __deserializer = _serde::#private::de::ContentRefDeserializer::<__D::Error>::new(&__content);
#first_attempt
#(
if let _serde::#private2::Ok(__ok) = #attempts {
return _serde::#private2::Ok(__ok);
}
)*
_serde::#private::Err(_serde::de::Error::custom(#fallthrough_msg))
}
}
// Also used by adjacently tagged enums
pub(super) fn deserialize_variant(
params: &Parameters,
variant: &Variant,
cattrs: &attr::Container,
) -> Fragment {
if let Some(path) = variant.attrs.deserialize_with() {
let unwrap_fn = unwrap_to_variant_closure(params, variant, false);
return quote_block! {
_serde::#private::Result::map(#path(__deserializer), #unwrap_fn)
};
}
let variant_ident = &variant.ident;
match effective_style(variant) {
Style::Unit => {
let this_value = &params.this_value;
let type_name = params.type_name();
let variant_name = variant.ident.to_string();
let default = variant.fields.first().map(|field| {
let default = Expr(expr_is_missing(field, cattrs));
quote!((#default))
});
quote_expr! {
match _serde::Deserializer::deserialize_any(
__deserializer,
_serde::#private::de::UntaggedUnitVisitor::new(#type_name, #variant_name)
) {
_serde::#private::Ok(()) => _serde::#private::Ok(#this_value::#variant_ident #default),
_serde::#private::Err(__err) => _serde::#private::Err(__err),
}
}
}
Style::Newtype => deserialize_newtype_variant(variant_ident, params, &variant.fields[0]),
Style::Tuple => tuple::deserialize(
params,
&variant.fields,
cattrs,
TupleForm::Untagged(variant_ident),
),
Style::Struct => struct_::deserialize(
params,
&variant.fields,
cattrs,
StructForm::Untagged(variant_ident),
),
}
}
// Also used by internally tagged enums
// Implicitly (via `generate_variant`) used by adjacently tagged enums
pub(super) fn deserialize_newtype_variant(
variant_ident: &syn::Ident,
params: &Parameters,
field: &Field,
) -> Fragment {
let this_value = &params.this_value;
let field_ty = field.ty;
match field.attrs.deserialize_with() {
None => {
let span = field.original.span();
let func = quote_spanned!(span=> <#field_ty as _serde::Deserialize>::deserialize);
quote_expr! {
_serde::#private::Result::map(#func(__deserializer), #this_value::#variant_ident)
}
}
Some(path) => {
quote_block! {
let __value: _serde::#private::Result<#field_ty, _> = #path(__deserializer);
_serde::#private::Result::map(__value, #this_value::#variant_ident)
}
}
}
}

477
vendor/serde_derive/src/de/identifier.rs vendored Normal file
View File

@@ -0,0 +1,477 @@
//! Deserialization of struct field identifiers and enum variant identifiers by
//! way of a Rust enum.
use crate::de::{FieldWithAliases, Parameters};
use crate::fragment::{Fragment, Stmts};
use crate::internals::ast::{Style, Variant};
use crate::internals::attr;
use crate::private;
use proc_macro2::{Literal, TokenStream};
use quote::{quote, ToTokens};
// Generates `Deserialize::deserialize` body for an enum with
// `serde(field_identifier)` or `serde(variant_identifier)` attribute.
pub(super) fn deserialize_custom(
params: &Parameters,
variants: &[Variant],
cattrs: &attr::Container,
) -> Fragment {
let is_variant = match cattrs.identifier() {
attr::Identifier::Variant => true,
attr::Identifier::Field => false,
attr::Identifier::No => unreachable!(),
};
let this_type = params.this_type.to_token_stream();
let this_value = params.this_value.to_token_stream();
let (ordinary, fallthrough, fallthrough_borrowed) = if let Some(last) = variants.last() {
let last_ident = &last.ident;
if last.attrs.other() {
// Process `serde(other)` attribute. It would always be found on the
// last variant (checked in `check_identifier`), so all preceding
// are ordinary variants.
let ordinary = &variants[..variants.len() - 1];
let fallthrough = quote!(_serde::#private::Ok(#this_value::#last_ident));
(ordinary, Some(fallthrough), None)
} else if let Style::Newtype = last.style {
let ordinary = &variants[..variants.len() - 1];
let fallthrough = |value| {
quote! {
_serde::#private::Result::map(
_serde::Deserialize::deserialize(
_serde::#private::de::IdentifierDeserializer::from(#value)
),
#this_value::#last_ident)
}
};
(
ordinary,
Some(fallthrough(quote!(__value))),
Some(fallthrough(quote!(_serde::#private::de::Borrowed(
__value
)))),
)
} else {
(variants, None, None)
}
} else {
(variants, None, None)
};
let idents_aliases: Vec<_> = ordinary
.iter()
.map(|variant| FieldWithAliases {
ident: variant.ident.clone(),
aliases: variant.attrs.aliases(),
})
.collect();
let names = idents_aliases.iter().flat_map(|variant| variant.aliases);
let names_const = if fallthrough.is_some() {
None
} else if is_variant {
let variants = quote! {
#[doc(hidden)]
const VARIANTS: &'static [&'static str] = &[ #(#names),* ];
};
Some(variants)
} else {
let fields = quote! {
#[doc(hidden)]
const FIELDS: &'static [&'static str] = &[ #(#names),* ];
};
Some(fields)
};
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
let visitor_impl = Stmts(deserialize_identifier(
&this_value,
&idents_aliases,
is_variant,
fallthrough,
fallthrough_borrowed,
false,
cattrs.expecting(),
));
quote_block! {
#names_const
#[doc(hidden)]
struct __FieldVisitor #de_impl_generics #where_clause {
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::de::Visitor<#delife> for __FieldVisitor #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
#visitor_impl
}
let __visitor = __FieldVisitor {
marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData,
};
_serde::Deserializer::deserialize_identifier(__deserializer, __visitor)
}
}
pub(super) fn deserialize_generated(
deserialized_fields: &[FieldWithAliases],
has_flatten: bool,
is_variant: bool,
ignore_variant: Option<TokenStream>,
fallthrough: Option<TokenStream>,
) -> Fragment {
let this_value = quote!(__Field);
let field_idents: &Vec<_> = &deserialized_fields
.iter()
.map(|field| &field.ident)
.collect();
let visitor_impl = Stmts(deserialize_identifier(
&this_value,
deserialized_fields,
is_variant,
fallthrough,
None,
!is_variant && has_flatten,
None,
));
let lifetime = if !is_variant && has_flatten {
Some(quote!(<'de>))
} else {
None
};
quote_block! {
#[allow(non_camel_case_types)]
#[doc(hidden)]
enum __Field #lifetime {
#(#field_idents,)*
#ignore_variant
}
#[doc(hidden)]
struct __FieldVisitor;
#[automatically_derived]
impl<'de> _serde::de::Visitor<'de> for __FieldVisitor {
type Value = __Field #lifetime;
#visitor_impl
}
#[automatically_derived]
impl<'de> _serde::Deserialize<'de> for __Field #lifetime {
#[inline]
fn deserialize<__D>(__deserializer: __D) -> _serde::#private::Result<Self, __D::Error>
where
__D: _serde::Deserializer<'de>,
{
_serde::Deserializer::deserialize_identifier(__deserializer, __FieldVisitor)
}
}
}
}
fn deserialize_identifier(
this_value: &TokenStream,
deserialized_fields: &[FieldWithAliases],
is_variant: bool,
fallthrough: Option<TokenStream>,
fallthrough_borrowed: Option<TokenStream>,
collect_other_fields: bool,
expecting: Option<&str>,
) -> Fragment {
let str_mapping = deserialized_fields.iter().map(|field| {
let ident = &field.ident;
let aliases = field.aliases;
let private2 = private;
// `aliases` also contains a main name
quote! {
#(
#aliases => _serde::#private2::Ok(#this_value::#ident),
)*
}
});
let bytes_mapping = deserialized_fields.iter().map(|field| {
let ident = &field.ident;
// `aliases` also contains a main name
let aliases = field
.aliases
.iter()
.map(|alias| Literal::byte_string(alias.value.as_bytes()));
let private2 = private;
quote! {
#(
#aliases => _serde::#private2::Ok(#this_value::#ident),
)*
}
});
let expecting = expecting.unwrap_or(if is_variant {
"variant identifier"
} else {
"field identifier"
});
let bytes_to_str = if fallthrough.is_some() || collect_other_fields {
None
} else {
Some(quote! {
let __value = &_serde::#private::from_utf8_lossy(__value);
})
};
let (
value_as_str_content,
value_as_borrowed_str_content,
value_as_bytes_content,
value_as_borrowed_bytes_content,
) = if collect_other_fields {
(
Some(quote! {
let __value = _serde::#private::de::Content::String(_serde::#private::ToString::to_string(__value));
}),
Some(quote! {
let __value = _serde::#private::de::Content::Str(__value);
}),
Some(quote! {
let __value = _serde::#private::de::Content::ByteBuf(__value.to_vec());
}),
Some(quote! {
let __value = _serde::#private::de::Content::Bytes(__value);
}),
)
} else {
(None, None, None, None)
};
let fallthrough_arm_tokens;
let fallthrough_arm = if let Some(fallthrough) = &fallthrough {
fallthrough
} else if is_variant {
fallthrough_arm_tokens = quote! {
_serde::#private::Err(_serde::de::Error::unknown_variant(__value, VARIANTS))
};
&fallthrough_arm_tokens
} else {
fallthrough_arm_tokens = quote! {
_serde::#private::Err(_serde::de::Error::unknown_field(__value, FIELDS))
};
&fallthrough_arm_tokens
};
let visit_other = if collect_other_fields {
quote! {
fn visit_bool<__E>(self, __value: bool) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::Bool(__value)))
}
fn visit_i8<__E>(self, __value: i8) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::I8(__value)))
}
fn visit_i16<__E>(self, __value: i16) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::I16(__value)))
}
fn visit_i32<__E>(self, __value: i32) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::I32(__value)))
}
fn visit_i64<__E>(self, __value: i64) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::I64(__value)))
}
fn visit_u8<__E>(self, __value: u8) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::U8(__value)))
}
fn visit_u16<__E>(self, __value: u16) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::U16(__value)))
}
fn visit_u32<__E>(self, __value: u32) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::U32(__value)))
}
fn visit_u64<__E>(self, __value: u64) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::U64(__value)))
}
fn visit_f32<__E>(self, __value: f32) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::F32(__value)))
}
fn visit_f64<__E>(self, __value: f64) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::F64(__value)))
}
fn visit_char<__E>(self, __value: char) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::Char(__value)))
}
fn visit_unit<__E>(self) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(__Field::__other(_serde::#private::de::Content::Unit))
}
}
} else {
let u64_mapping = deserialized_fields.iter().enumerate().map(|(i, field)| {
let i = i as u64;
let ident = &field.ident;
quote!(#i => _serde::#private::Ok(#this_value::#ident))
});
let u64_fallthrough_arm_tokens;
let u64_fallthrough_arm = if let Some(fallthrough) = &fallthrough {
fallthrough
} else {
let index_expecting = if is_variant { "variant" } else { "field" };
let fallthrough_msg = format!(
"{} index 0 <= i < {}",
index_expecting,
deserialized_fields.len(),
);
u64_fallthrough_arm_tokens = quote! {
_serde::#private::Err(_serde::de::Error::invalid_value(
_serde::de::Unexpected::Unsigned(__value),
&#fallthrough_msg,
))
};
&u64_fallthrough_arm_tokens
};
quote! {
fn visit_u64<__E>(self, __value: u64) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
match __value {
#(#u64_mapping,)*
_ => #u64_fallthrough_arm,
}
}
}
};
let visit_borrowed = if fallthrough_borrowed.is_some() || collect_other_fields {
let str_mapping = str_mapping.clone();
let bytes_mapping = bytes_mapping.clone();
let fallthrough_borrowed_arm = fallthrough_borrowed.as_ref().unwrap_or(fallthrough_arm);
Some(quote! {
fn visit_borrowed_str<__E>(self, __value: &'de str) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
match __value {
#(#str_mapping)*
_ => {
#value_as_borrowed_str_content
#fallthrough_borrowed_arm
}
}
}
fn visit_borrowed_bytes<__E>(self, __value: &'de [u8]) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
match __value {
#(#bytes_mapping)*
_ => {
#bytes_to_str
#value_as_borrowed_bytes_content
#fallthrough_borrowed_arm
}
}
}
})
} else {
None
};
quote_block! {
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#visit_other
fn visit_str<__E>(self, __value: &str) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
match __value {
#(#str_mapping)*
_ => {
#value_as_str_content
#fallthrough_arm
}
}
}
fn visit_bytes<__E>(self, __value: &[u8]) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
match __value {
#(#bytes_mapping)*
_ => {
#bytes_to_str
#value_as_bytes_content
#fallthrough_arm
}
}
}
#visit_borrowed
}
}

697
vendor/serde_derive/src/de/struct_.rs vendored Normal file
View File

@@ -0,0 +1,697 @@
use crate::de::identifier;
use crate::de::{
deserialize_seq, expr_is_missing, field_i, has_flatten, wrap_deserialize_field_with,
FieldWithAliases, Parameters, StructForm,
};
#[cfg(feature = "deserialize_in_place")]
use crate::de::{deserialize_seq_in_place, place_lifetime};
use crate::fragment::{Expr, Fragment, Match, Stmts};
use crate::internals::ast::Field;
use crate::internals::attr;
use crate::private;
use proc_macro2::TokenStream;
use quote::{quote, quote_spanned};
use syn::spanned::Spanned;
/// Generates `Deserialize::deserialize` body for a `struct Struct {...}`
pub(super) fn deserialize(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
form: StructForm,
) -> Fragment {
let this_type = &params.this_type;
let this_value = &params.this_value;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
// If there are getters (implying private fields), construct the local type
// and use an `Into` conversion to get the remote type. If there are no
// getters then construct the target type directly.
let construct = if params.has_getter {
let local = &params.local;
quote!(#local)
} else {
quote!(#this_value)
};
let type_path = match form {
StructForm::Struct => construct,
StructForm::ExternallyTagged(variant_ident)
| StructForm::InternallyTagged(variant_ident)
| StructForm::Untagged(variant_ident) => quote!(#construct::#variant_ident),
};
let expecting = match form {
StructForm::Struct => format!("struct {}", params.type_name()),
StructForm::ExternallyTagged(variant_ident)
| StructForm::InternallyTagged(variant_ident)
| StructForm::Untagged(variant_ident) => {
format!("struct variant {}::{}", params.type_name(), variant_ident)
}
};
let expecting = cattrs.expecting().unwrap_or(&expecting);
let deserialized_fields: Vec<_> = fields
.iter()
.enumerate()
// Skip fields that shouldn't be deserialized or that were flattened,
// so they don't appear in the storage in their literal form
.filter(|&(_, field)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
.map(|(i, field)| FieldWithAliases {
ident: field_i(i),
aliases: field.attrs.aliases(),
})
.collect();
let has_flatten = has_flatten(fields);
let field_visitor = deserialize_field_identifier(&deserialized_fields, cattrs, has_flatten);
// untagged struct variants do not get a visit_seq method. The same applies to
// structs that only have a map representation.
let visit_seq = match form {
StructForm::Untagged(_) => None,
_ if has_flatten => None,
_ => {
let mut_seq = if deserialized_fields.is_empty() {
quote!(_)
} else {
quote!(mut __seq)
};
let visit_seq = Stmts(deserialize_seq(
&type_path, params, fields, true, cattrs, expecting,
));
Some(quote! {
#[inline]
fn visit_seq<__A>(self, #mut_seq: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::SeqAccess<#delife>,
{
#visit_seq
}
})
}
};
let visit_map = Stmts(deserialize_map(
&type_path,
params,
fields,
cattrs,
has_flatten,
));
let visitor_seed = match form {
StructForm::ExternallyTagged(..) if has_flatten => Some(quote! {
#[automatically_derived]
impl #de_impl_generics _serde::de::DeserializeSeed<#delife> for __Visitor #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
fn deserialize<__D>(self, __deserializer: __D) -> _serde::#private::Result<Self::Value, __D::Error>
where
__D: _serde::Deserializer<#delife>,
{
_serde::Deserializer::deserialize_map(__deserializer, self)
}
}
}),
_ => None,
};
let fields_stmt = if has_flatten {
None
} else {
let field_names = deserialized_fields.iter().flat_map(|field| field.aliases);
Some(quote! {
#[doc(hidden)]
const FIELDS: &'static [&'static str] = &[ #(#field_names),* ];
})
};
let visitor_expr = quote! {
__Visitor {
marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData,
}
};
let dispatch = match form {
StructForm::Struct if has_flatten => quote! {
_serde::Deserializer::deserialize_map(__deserializer, #visitor_expr)
},
StructForm::Struct => {
let type_name = cattrs.name().deserialize_name();
quote! {
_serde::Deserializer::deserialize_struct(__deserializer, #type_name, FIELDS, #visitor_expr)
}
}
StructForm::ExternallyTagged(_) if has_flatten => quote! {
_serde::de::VariantAccess::newtype_variant_seed(__variant, #visitor_expr)
},
StructForm::ExternallyTagged(_) => quote! {
_serde::de::VariantAccess::struct_variant(__variant, FIELDS, #visitor_expr)
},
StructForm::InternallyTagged(_) => quote! {
_serde::Deserializer::deserialize_any(__deserializer, #visitor_expr)
},
StructForm::Untagged(_) => quote! {
_serde::Deserializer::deserialize_any(__deserializer, #visitor_expr)
},
};
quote_block! {
#field_visitor
#[doc(hidden)]
struct __Visitor #de_impl_generics #where_clause {
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#visit_seq
#[inline]
fn visit_map<__A>(self, mut __map: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::MapAccess<#delife>,
{
#visit_map
}
}
#visitor_seed
#fields_stmt
#dispatch
}
}
fn deserialize_map(
struct_path: &TokenStream,
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
has_flatten: bool,
) -> Fragment {
// Create the field names for the fields.
let fields_names: Vec<_> = fields
.iter()
.enumerate()
.map(|(i, field)| (field, field_i(i)))
.collect();
// Declare each field that will be deserialized.
let let_values = fields_names
.iter()
.filter(|&&(field, _)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
.map(|(field, name)| {
let field_ty = field.ty;
quote! {
let mut #name: _serde::#private::Option<#field_ty> = _serde::#private::None;
}
});
// Collect contents for flatten fields into a buffer
let let_collect = if has_flatten {
Some(quote! {
let mut __collect = _serde::#private::Vec::<_serde::#private::Option<(
_serde::#private::de::Content,
_serde::#private::de::Content
)>>::new();
})
} else {
None
};
// Match arms to extract a value for a field.
let value_arms = fields_names
.iter()
.filter(|&&(field, _)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
.map(|(field, name)| {
let deser_name = field.attrs.name().deserialize_name();
let visit = match field.attrs.deserialize_with() {
None => {
let field_ty = field.ty;
let span = field.original.span();
let func =
quote_spanned!(span=> _serde::de::MapAccess::next_value::<#field_ty>);
quote! {
#func(&mut __map)?
}
}
Some(path) => {
let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
quote!({
#wrapper
match _serde::de::MapAccess::next_value::<#wrapper_ty>(&mut __map) {
_serde::#private::Ok(__wrapper) => __wrapper.value,
_serde::#private::Err(__err) => {
return _serde::#private::Err(__err);
}
}
})
}
};
quote! {
__Field::#name => {
if _serde::#private::Option::is_some(&#name) {
return _serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#deser_name));
}
#name = _serde::#private::Some(#visit);
}
}
});
// Visit ignored values to consume them
let ignored_arm = if has_flatten {
Some(quote! {
__Field::__other(__name) => {
__collect.push(_serde::#private::Some((
__name,
_serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::ContentVisitor::new())?)));
}
})
} else if cattrs.deny_unknown_fields() {
None
} else {
Some(quote! {
_ => { let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?; }
})
};
let all_skipped = fields.iter().all(|field| field.attrs.skip_deserializing());
let match_keys = if cattrs.deny_unknown_fields() && all_skipped {
quote! {
// FIXME: Once feature(exhaustive_patterns) is stable:
// let _serde::#private::None::<__Field> = _serde::de::MapAccess::next_key(&mut __map)?;
_serde::#private::Option::map(
_serde::de::MapAccess::next_key::<__Field>(&mut __map)?,
|__impossible| match __impossible {});
}
} else {
quote! {
while let _serde::#private::Some(__key) = _serde::de::MapAccess::next_key::<__Field>(&mut __map)? {
match __key {
#(#value_arms)*
#ignored_arm
}
}
}
};
let extract_values = fields_names
.iter()
.filter(|&&(field, _)| !field.attrs.skip_deserializing() && !field.attrs.flatten())
.map(|(field, name)| {
let missing_expr = Match(expr_is_missing(field, cattrs));
quote! {
let #name = match #name {
_serde::#private::Some(#name) => #name,
_serde::#private::None => #missing_expr
};
}
});
let extract_collected = fields_names
.iter()
.filter(|&&(field, _)| field.attrs.flatten() && !field.attrs.skip_deserializing())
.map(|(field, name)| {
let field_ty = field.ty;
let func = match field.attrs.deserialize_with() {
None => {
let span = field.original.span();
quote_spanned!(span=> _serde::de::Deserialize::deserialize)
}
Some(path) => quote!(#path),
};
quote! {
let #name: #field_ty = #func(
_serde::#private::de::FlatMapDeserializer(
&mut __collect,
_serde::#private::PhantomData))?;
}
});
let collected_deny_unknown_fields = if has_flatten && cattrs.deny_unknown_fields() {
Some(quote! {
if let _serde::#private::Some(_serde::#private::Some((__key, _))) =
__collect.into_iter().filter(_serde::#private::Option::is_some).next()
{
if let _serde::#private::Some(__key) = _serde::#private::de::content_as_str(&__key) {
return _serde::#private::Err(
_serde::de::Error::custom(format_args!("unknown field `{}`", &__key)));
} else {
return _serde::#private::Err(
_serde::de::Error::custom(format_args!("unexpected map key")));
}
}
})
} else {
None
};
let result = fields_names.iter().map(|(field, name)| {
let member = &field.member;
if field.attrs.skip_deserializing() {
let value = Expr(expr_is_missing(field, cattrs));
quote!(#member: #value)
} else {
quote!(#member: #name)
}
});
let let_default = match cattrs.default() {
attr::Default::Default => Some(quote!(
let __default: Self::Value = _serde::#private::Default::default();
)),
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(default = "...")]
// ^^^^^
attr::Default::Path(path) => Some(quote_spanned!(path.span()=>
let __default: Self::Value = #path();
)),
attr::Default::None => {
// We don't need the default value, to prevent an unused variable warning
// we'll leave the line empty.
None
}
};
let mut result = quote!(#struct_path { #(#result),* });
if params.has_getter {
let this_type = &params.this_type;
let (_, ty_generics, _) = params.generics.split_for_impl();
result = quote! {
_serde::#private::Into::<#this_type #ty_generics>::into(#result)
};
}
quote_block! {
#(#let_values)*
#let_collect
#match_keys
#let_default
#(#extract_values)*
#(#extract_collected)*
#collected_deny_unknown_fields
_serde::#private::Ok(#result)
}
}
/// Generates `Deserialize::deserialize_in_place` body for a `struct Struct {...}`
#[cfg(feature = "deserialize_in_place")]
pub(super) fn deserialize_in_place(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
) -> Option<Fragment> {
// for now we do not support in_place deserialization for structs that
// are represented as map.
if has_flatten(fields) {
return None;
}
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
let expecting = format!("struct {}", params.type_name());
let expecting = cattrs.expecting().unwrap_or(&expecting);
let deserialized_fields: Vec<_> = fields
.iter()
.enumerate()
.filter(|&(_, field)| !field.attrs.skip_deserializing())
.map(|(i, field)| FieldWithAliases {
ident: field_i(i),
aliases: field.attrs.aliases(),
})
.collect();
let field_visitor = deserialize_field_identifier(&deserialized_fields, cattrs, false);
let mut_seq = if deserialized_fields.is_empty() {
quote!(_)
} else {
quote!(mut __seq)
};
let visit_seq = Stmts(deserialize_seq_in_place(params, fields, cattrs, expecting));
let visit_map = Stmts(deserialize_map_in_place(params, fields, cattrs));
let field_names = deserialized_fields.iter().flat_map(|field| field.aliases);
let type_name = cattrs.name().deserialize_name();
let in_place_impl_generics = de_impl_generics.in_place();
let in_place_ty_generics = de_ty_generics.in_place();
let place_life = place_lifetime();
Some(quote_block! {
#field_visitor
#[doc(hidden)]
struct __Visitor #in_place_impl_generics #where_clause {
place: &#place_life mut #this_type #ty_generics,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #in_place_impl_generics _serde::de::Visitor<#delife> for __Visitor #in_place_ty_generics #where_clause {
type Value = ();
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#[inline]
fn visit_seq<__A>(self, #mut_seq: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::SeqAccess<#delife>,
{
#visit_seq
}
#[inline]
fn visit_map<__A>(self, mut __map: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::MapAccess<#delife>,
{
#visit_map
}
}
#[doc(hidden)]
const FIELDS: &'static [&'static str] = &[ #(#field_names),* ];
_serde::Deserializer::deserialize_struct(__deserializer, #type_name, FIELDS, __Visitor {
place: __place,
lifetime: _serde::#private::PhantomData,
})
})
}
#[cfg(feature = "deserialize_in_place")]
fn deserialize_map_in_place(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
) -> Fragment {
assert!(
!has_flatten(fields),
"inplace deserialization of maps does not support flatten fields"
);
// Create the field names for the fields.
let fields_names: Vec<_> = fields
.iter()
.enumerate()
.map(|(i, field)| (field, field_i(i)))
.collect();
// For deserialize_in_place, declare booleans for each field that will be
// deserialized.
let let_flags = fields_names
.iter()
.filter(|&&(field, _)| !field.attrs.skip_deserializing())
.map(|(_, name)| {
quote! {
let mut #name: bool = false;
}
});
// Match arms to extract a value for a field.
let value_arms_from = fields_names
.iter()
.filter(|&&(field, _)| !field.attrs.skip_deserializing())
.map(|(field, name)| {
let deser_name = field.attrs.name().deserialize_name();
let member = &field.member;
let visit = match field.attrs.deserialize_with() {
None => {
quote! {
_serde::de::MapAccess::next_value_seed(&mut __map, _serde::#private::de::InPlaceSeed(&mut self.place.#member))?
}
}
Some(path) => {
let (wrapper, wrapper_ty) = wrap_deserialize_field_with(params, field.ty, path);
quote!({
#wrapper
self.place.#member = match _serde::de::MapAccess::next_value::<#wrapper_ty>(&mut __map) {
_serde::#private::Ok(__wrapper) => __wrapper.value,
_serde::#private::Err(__err) => {
return _serde::#private::Err(__err);
}
};
})
}
};
quote! {
__Field::#name => {
if #name {
return _serde::#private::Err(<__A::Error as _serde::de::Error>::duplicate_field(#deser_name));
}
#visit;
#name = true;
}
}
});
// Visit ignored values to consume them
let ignored_arm = if cattrs.deny_unknown_fields() {
None
} else {
Some(quote! {
_ => { let _ = _serde::de::MapAccess::next_value::<_serde::de::IgnoredAny>(&mut __map)?; }
})
};
let all_skipped = fields.iter().all(|field| field.attrs.skip_deserializing());
let match_keys = if cattrs.deny_unknown_fields() && all_skipped {
quote! {
// FIXME: Once feature(exhaustive_patterns) is stable:
// let _serde::#private::None::<__Field> = _serde::de::MapAccess::next_key(&mut __map)?;
_serde::#private::Option::map(
_serde::de::MapAccess::next_key::<__Field>(&mut __map)?,
|__impossible| match __impossible {});
}
} else {
quote! {
while let _serde::#private::Some(__key) = _serde::de::MapAccess::next_key::<__Field>(&mut __map)? {
match __key {
#(#value_arms_from)*
#ignored_arm
}
}
}
};
let check_flags = fields_names
.iter()
.filter(|&&(field, _)| !field.attrs.skip_deserializing())
.map(|(field, name)| {
let missing_expr = expr_is_missing(field, cattrs);
// If missing_expr unconditionally returns an error, don't try
// to assign its value to self.place.
if field.attrs.default().is_none()
&& cattrs.default().is_none()
&& field.attrs.deserialize_with().is_some()
{
let missing_expr = Stmts(missing_expr);
quote! {
if !#name {
#missing_expr;
}
}
} else {
let member = &field.member;
let missing_expr = Expr(missing_expr);
quote! {
if !#name {
self.place.#member = #missing_expr;
};
}
}
});
let this_type = &params.this_type;
let (_, ty_generics, _) = params.generics.split_for_impl();
let let_default = match cattrs.default() {
attr::Default::Default => Some(quote!(
let __default: #this_type #ty_generics = _serde::#private::Default::default();
)),
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(default = "...")]
// ^^^^^
attr::Default::Path(path) => Some(quote_spanned!(path.span()=>
let __default: #this_type #ty_generics = #path();
)),
attr::Default::None => {
// We don't need the default value, to prevent an unused variable warning
// we'll leave the line empty.
None
}
};
quote_block! {
#(#let_flags)*
#match_keys
#let_default
#(#check_flags)*
_serde::#private::Ok(())
}
}
/// Generates enum and its `Deserialize` implementation that represents each
/// non-skipped field of the struct
fn deserialize_field_identifier(
deserialized_fields: &[FieldWithAliases],
cattrs: &attr::Container,
has_flatten: bool,
) -> Stmts {
let (ignore_variant, fallthrough) = if has_flatten {
let ignore_variant = quote!(__other(_serde::#private::de::Content<'de>),);
let fallthrough = quote!(_serde::#private::Ok(__Field::__other(__value)));
(Some(ignore_variant), Some(fallthrough))
} else if cattrs.deny_unknown_fields() {
(None, None)
} else {
let ignore_variant = quote!(__ignore,);
let fallthrough = quote!(_serde::#private::Ok(__Field::__ignore));
(Some(ignore_variant), Some(fallthrough))
};
Stmts(identifier::deserialize_generated(
deserialized_fields,
has_flatten,
false,
ignore_variant,
fallthrough,
))
}

283
vendor/serde_derive/src/de/tuple.rs vendored Normal file
View File

@@ -0,0 +1,283 @@
use crate::de::{deserialize_seq, has_flatten, Parameters, TupleForm};
#[cfg(feature = "deserialize_in_place")]
use crate::de::{deserialize_seq_in_place, place_lifetime};
use crate::fragment::{Fragment, Stmts};
use crate::internals::ast::Field;
use crate::internals::attr;
use crate::private;
use proc_macro2::TokenStream;
use quote::{quote, quote_spanned};
use syn::spanned::Spanned;
/// Generates `Deserialize::deserialize` body for a `struct Tuple(...);` including `struct Newtype(T);`
pub(super) fn deserialize(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
form: TupleForm,
) -> Fragment {
assert!(
!has_flatten(fields),
"tuples and tuple variants cannot have flatten fields"
);
let field_count = fields
.iter()
.filter(|field| !field.attrs.skip_deserializing())
.count();
let this_type = &params.this_type;
let this_value = &params.this_value;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
// If there are getters (implying private fields), construct the local type
// and use an `Into` conversion to get the remote type. If there are no
// getters then construct the target type directly.
let construct = if params.has_getter {
let local = &params.local;
quote!(#local)
} else {
quote!(#this_value)
};
let type_path = match form {
TupleForm::Tuple => construct,
TupleForm::ExternallyTagged(variant_ident) | TupleForm::Untagged(variant_ident) => {
quote!(#construct::#variant_ident)
}
};
let expecting = match form {
TupleForm::Tuple => format!("tuple struct {}", params.type_name()),
TupleForm::ExternallyTagged(variant_ident) | TupleForm::Untagged(variant_ident) => {
format!("tuple variant {}::{}", params.type_name(), variant_ident)
}
};
let expecting = cattrs.expecting().unwrap_or(&expecting);
let nfields = fields.len();
let visit_newtype_struct = match form {
TupleForm::Tuple if nfields == 1 => {
Some(deserialize_newtype_struct(&type_path, params, &fields[0]))
}
_ => None,
};
let visit_seq = Stmts(deserialize_seq(
&type_path, params, fields, false, cattrs, expecting,
));
let visitor_expr = quote! {
__Visitor {
marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData,
}
};
let dispatch = match form {
TupleForm::Tuple if nfields == 1 => {
let type_name = cattrs.name().deserialize_name();
quote! {
_serde::Deserializer::deserialize_newtype_struct(__deserializer, #type_name, #visitor_expr)
}
}
TupleForm::Tuple => {
let type_name = cattrs.name().deserialize_name();
quote! {
_serde::Deserializer::deserialize_tuple_struct(__deserializer, #type_name, #field_count, #visitor_expr)
}
}
TupleForm::ExternallyTagged(_) => quote! {
_serde::de::VariantAccess::tuple_variant(__variant, #field_count, #visitor_expr)
},
TupleForm::Untagged(_) => quote! {
_serde::Deserializer::deserialize_tuple(__deserializer, #field_count, #visitor_expr)
},
};
let visitor_var = if field_count == 0 {
quote!(_)
} else {
quote!(mut __seq)
};
quote_block! {
#[doc(hidden)]
struct __Visitor #de_impl_generics #where_clause {
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#visit_newtype_struct
#[inline]
fn visit_seq<__A>(self, #visitor_var: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::SeqAccess<#delife>,
{
#visit_seq
}
}
#dispatch
}
}
fn deserialize_newtype_struct(
type_path: &TokenStream,
params: &Parameters,
field: &Field,
) -> TokenStream {
let delife = params.borrowed.de_lifetime();
let field_ty = field.ty;
let deserializer_var = quote!(__e);
let value = match field.attrs.deserialize_with() {
None => {
let span = field.original.span();
let func = quote_spanned!(span=> <#field_ty as _serde::Deserialize>::deserialize);
quote! {
#func(#deserializer_var)?
}
}
Some(path) => {
// If #path returns wrong type, error will be reported here (^^^^^).
// We attach span of the path to the function so it will be reported
// on the #[serde(with = "...")]
// ^^^^^
quote_spanned! {path.span()=>
#path(#deserializer_var)?
}
}
};
let mut result = quote!(#type_path(__field0));
if params.has_getter {
let this_type = &params.this_type;
let (_, ty_generics, _) = params.generics.split_for_impl();
result = quote! {
_serde::#private::Into::<#this_type #ty_generics>::into(#result)
};
}
quote! {
#[inline]
fn visit_newtype_struct<__E>(self, #deserializer_var: __E) -> _serde::#private::Result<Self::Value, __E::Error>
where
__E: _serde::Deserializer<#delife>,
{
let __field0: #field_ty = #value;
_serde::#private::Ok(#result)
}
}
}
/// Generates `Deserialize::deserialize_in_place` body for a `struct Tuple(...);` including `struct Newtype(T);`
#[cfg(feature = "deserialize_in_place")]
pub(super) fn deserialize_in_place(
params: &Parameters,
fields: &[Field],
cattrs: &attr::Container,
) -> Fragment {
assert!(
!has_flatten(fields),
"tuples and tuple variants cannot have flatten fields"
);
let field_count = fields
.iter()
.filter(|field| !field.attrs.skip_deserializing())
.count();
let this_type = &params.this_type;
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
let expecting = format!("tuple struct {}", params.type_name());
let expecting = cattrs.expecting().unwrap_or(&expecting);
let nfields = fields.len();
let visit_newtype_struct = if nfields == 1 {
// We do not generate deserialize_in_place if every field has a
// deserialize_with.
assert!(fields[0].attrs.deserialize_with().is_none());
Some(quote! {
#[inline]
fn visit_newtype_struct<__E>(self, __e: __E) -> _serde::#private::Result<Self::Value, __E::Error>
where
__E: _serde::Deserializer<#delife>,
{
_serde::Deserialize::deserialize_in_place(__e, &mut self.place.0)
}
})
} else {
None
};
let visit_seq = Stmts(deserialize_seq_in_place(params, fields, cattrs, expecting));
let visitor_expr = quote! {
__Visitor {
place: __place,
lifetime: _serde::#private::PhantomData,
}
};
let type_name = cattrs.name().deserialize_name();
let dispatch = if nfields == 1 {
quote!(_serde::Deserializer::deserialize_newtype_struct(__deserializer, #type_name, #visitor_expr))
} else {
quote!(_serde::Deserializer::deserialize_tuple_struct(__deserializer, #type_name, #field_count, #visitor_expr))
};
let visitor_var = if field_count == 0 {
quote!(_)
} else {
quote!(mut __seq)
};
let in_place_impl_generics = de_impl_generics.in_place();
let in_place_ty_generics = de_ty_generics.in_place();
let place_life = place_lifetime();
quote_block! {
#[doc(hidden)]
struct __Visitor #in_place_impl_generics #where_clause {
place: &#place_life mut #this_type #ty_generics,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #in_place_impl_generics _serde::de::Visitor<#delife> for __Visitor #in_place_ty_generics #where_clause {
type Value = ();
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#visit_newtype_struct
#[inline]
fn visit_seq<__A>(self, #visitor_var: __A) -> _serde::#private::Result<Self::Value, __A::Error>
where
__A: _serde::de::SeqAccess<#delife>,
{
#visit_seq
}
}
#dispatch
}
}

52
vendor/serde_derive/src/de/unit.rs vendored Normal file
View File

@@ -0,0 +1,52 @@
use crate::de::Parameters;
use crate::fragment::Fragment;
use crate::internals::attr;
use crate::private;
use quote::quote;
/// Generates `Deserialize::deserialize` body for a `struct Unit;`
pub(super) fn deserialize(params: &Parameters, cattrs: &attr::Container) -> Fragment {
let this_type = &params.this_type;
let this_value = &params.this_value;
let type_name = cattrs.name().deserialize_name();
let (de_impl_generics, de_ty_generics, ty_generics, where_clause) =
params.generics_with_de_lifetime();
let delife = params.borrowed.de_lifetime();
let expecting = format!("unit struct {}", params.type_name());
let expecting = cattrs.expecting().unwrap_or(&expecting);
quote_block! {
#[doc(hidden)]
struct __Visitor #de_impl_generics #where_clause {
marker: _serde::#private::PhantomData<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData<&#delife ()>,
}
#[automatically_derived]
impl #de_impl_generics _serde::de::Visitor<#delife> for __Visitor #de_ty_generics #where_clause {
type Value = #this_type #ty_generics;
fn expecting(&self, __formatter: &mut _serde::#private::Formatter) -> _serde::#private::fmt::Result {
_serde::#private::Formatter::write_str(__formatter, #expecting)
}
#[inline]
fn visit_unit<__E>(self) -> _serde::#private::Result<Self::Value, __E>
where
__E: _serde::de::Error,
{
_serde::#private::Ok(#this_value)
}
}
_serde::Deserializer::deserialize_unit_struct(
__deserializer,
#type_name,
__Visitor {
marker: _serde::#private::PhantomData::<#this_type #ty_generics>,
lifetime: _serde::#private::PhantomData,
},
)
}
}

56
vendor/serde_derive/src/deprecated.rs vendored Normal file
View File

@@ -0,0 +1,56 @@
use proc_macro2::TokenStream;
use quote::quote;
pub fn allow_deprecated(input: &syn::DeriveInput) -> Option<TokenStream> {
if should_allow_deprecated(input) {
Some(quote! { #[allow(deprecated)] })
} else {
None
}
}
/// Determine if an `#[allow(deprecated)]` should be added to the derived impl.
///
/// This should happen if the derive input or an enum variant it contains has
/// one of:
/// - `#[deprecated]`
/// - `#[allow(deprecated)]`
fn should_allow_deprecated(input: &syn::DeriveInput) -> bool {
if contains_deprecated(&input.attrs) {
return true;
}
if let syn::Data::Enum(data_enum) = &input.data {
for variant in &data_enum.variants {
if contains_deprecated(&variant.attrs) {
return true;
}
}
}
false
}
/// Check whether the given attributes contains one of:
/// - `#[deprecated]`
/// - `#[allow(deprecated)]`
fn contains_deprecated(attrs: &[syn::Attribute]) -> bool {
for attr in attrs {
if attr.path().is_ident("deprecated") {
return true;
}
if let syn::Meta::List(meta_list) = &attr.meta {
if meta_list.path.is_ident("allow") {
let mut allow_deprecated = false;
let _ = meta_list.parse_nested_meta(|meta| {
if meta.path.is_ident("deprecated") {
allow_deprecated = true;
}
Ok(())
});
if allow_deprecated {
return true;
}
}
}
}
false
}

31
vendor/serde_derive/src/dummy.rs vendored Normal file
View File

@@ -0,0 +1,31 @@
use proc_macro2::TokenStream;
use quote::quote;
pub fn wrap_in_const(serde_path: Option<&syn::Path>, code: TokenStream) -> TokenStream {
let use_serde = match serde_path {
Some(path) => quote! {
use #path as _serde;
},
None => quote! {
#[allow(unused_extern_crates, clippy::useless_attribute)]
extern crate serde as _serde;
},
};
quote! {
#[doc(hidden)]
#[allow(
non_upper_case_globals,
unused_attributes,
unused_qualifications,
clippy::absolute_paths,
)]
const _: () = {
#use_serde
_serde::__require_serde_not_serde_core!();
#code
};
}
}

74
vendor/serde_derive/src/fragment.rs vendored Normal file
View File

@@ -0,0 +1,74 @@
use proc_macro2::TokenStream;
use quote::ToTokens;
use syn::{token, Token};
pub enum Fragment {
/// Tokens that can be used as an expression.
Expr(TokenStream),
/// Tokens that can be used inside a block. The surrounding curly braces are
/// not part of these tokens.
Block(TokenStream),
}
macro_rules! quote_expr {
($($tt:tt)*) => {
$crate::fragment::Fragment::Expr(quote!($($tt)*))
}
}
macro_rules! quote_block {
($($tt:tt)*) => {
$crate::fragment::Fragment::Block(quote!($($tt)*))
}
}
/// Interpolate a fragment in place of an expression. This involves surrounding
/// Block fragments in curly braces.
pub struct Expr(pub Fragment);
impl ToTokens for Expr {
fn to_tokens(&self, out: &mut TokenStream) {
match &self.0 {
Fragment::Expr(expr) => expr.to_tokens(out),
Fragment::Block(block) => {
token::Brace::default().surround(out, |out| block.to_tokens(out));
}
}
}
}
/// Interpolate a fragment as the statements of a block.
pub struct Stmts(pub Fragment);
impl ToTokens for Stmts {
fn to_tokens(&self, out: &mut TokenStream) {
match &self.0 {
Fragment::Expr(expr) => expr.to_tokens(out),
Fragment::Block(block) => block.to_tokens(out),
}
}
}
/// Interpolate a fragment as the value part of a `match` expression. This
/// involves putting a comma after expressions and curly braces around blocks.
pub struct Match(pub Fragment);
impl ToTokens for Match {
fn to_tokens(&self, out: &mut TokenStream) {
match &self.0 {
Fragment::Expr(expr) => {
expr.to_tokens(out);
<Token![,]>::default().to_tokens(out);
}
Fragment::Block(block) => {
token::Brace::default().surround(out, |out| block.to_tokens(out));
}
}
}
}
impl AsRef<TokenStream> for Fragment {
fn as_ref(&self) -> &TokenStream {
match self {
Fragment::Expr(expr) => expr,
Fragment::Block(block) => block,
}
}
}

218
vendor/serde_derive/src/internals/ast.rs vendored Normal file
View File

@@ -0,0 +1,218 @@
//! A Serde ast, parsed from the Syn ast and ready to generate Rust code.
use crate::internals::{attr, check, Ctxt, Derive};
use proc_macro2::Ident;
use syn::punctuated::Punctuated;
use syn::Token;
/// A source data structure annotated with `#[derive(Serialize)]` and/or `#[derive(Deserialize)]`,
/// parsed into an internal representation.
pub struct Container<'a> {
/// The struct or enum name (without generics).
pub ident: syn::Ident,
/// Attributes on the structure, parsed for Serde.
pub attrs: attr::Container,
/// The contents of the struct or enum.
pub data: Data<'a>,
/// Any generics on the struct or enum.
pub generics: &'a syn::Generics,
/// Original input.
pub original: &'a syn::DeriveInput,
}
/// The fields of a struct or enum.
///
/// Analogous to `syn::Data`.
pub enum Data<'a> {
Enum(Vec<Variant<'a>>),
Struct(Style, Vec<Field<'a>>),
}
/// A variant of an enum.
pub struct Variant<'a> {
pub ident: syn::Ident,
pub attrs: attr::Variant,
pub style: Style,
pub fields: Vec<Field<'a>>,
pub original: &'a syn::Variant,
}
/// A field of a struct.
pub struct Field<'a> {
pub member: syn::Member,
pub attrs: attr::Field,
pub ty: &'a syn::Type,
pub original: &'a syn::Field,
}
#[derive(Copy, Clone)]
pub enum Style {
/// Named fields.
Struct,
/// Many unnamed fields.
Tuple,
/// One unnamed field.
Newtype,
/// No fields.
Unit,
}
impl<'a> Container<'a> {
/// Convert the raw Syn ast into a parsed container object, collecting errors in `cx`.
pub fn from_ast(
cx: &Ctxt,
item: &'a syn::DeriveInput,
derive: Derive,
private: &Ident,
) -> Option<Container<'a>> {
let attrs = attr::Container::from_ast(cx, item);
let mut data = match &item.data {
syn::Data::Enum(data) => {
Data::Enum(enum_from_ast(cx, &data.variants, attrs.default(), private))
}
syn::Data::Struct(data) => {
let (style, fields) =
struct_from_ast(cx, &data.fields, None, attrs.default(), private);
Data::Struct(style, fields)
}
syn::Data::Union(_) => {
cx.error_spanned_by(item, "Serde does not support derive for unions");
return None;
}
};
match &mut data {
Data::Enum(variants) => {
for variant in variants {
variant.attrs.rename_by_rules(attrs.rename_all_rules());
for field in &mut variant.fields {
field.attrs.rename_by_rules(
variant
.attrs
.rename_all_rules()
.or(attrs.rename_all_fields_rules()),
);
}
}
}
Data::Struct(_, fields) => {
for field in fields {
field.attrs.rename_by_rules(attrs.rename_all_rules());
}
}
}
let mut item = Container {
ident: item.ident.clone(),
attrs,
data,
generics: &item.generics,
original: item,
};
check::check(cx, &mut item, derive);
Some(item)
}
}
impl<'a> Data<'a> {
pub fn all_fields(&'a self) -> Box<dyn Iterator<Item = &'a Field<'a>> + 'a> {
match self {
Data::Enum(variants) => {
Box::new(variants.iter().flat_map(|variant| variant.fields.iter()))
}
Data::Struct(_, fields) => Box::new(fields.iter()),
}
}
pub fn has_getter(&self) -> bool {
self.all_fields().any(|f| f.attrs.getter().is_some())
}
}
fn enum_from_ast<'a>(
cx: &Ctxt,
variants: &'a Punctuated<syn::Variant, Token![,]>,
container_default: &attr::Default,
private: &Ident,
) -> Vec<Variant<'a>> {
let variants: Vec<Variant> = variants
.iter()
.map(|variant| {
let attrs = attr::Variant::from_ast(cx, variant);
let (style, fields) = struct_from_ast(
cx,
&variant.fields,
Some(&attrs),
container_default,
private,
);
Variant {
ident: variant.ident.clone(),
attrs,
style,
fields,
original: variant,
}
})
.collect();
let index_of_last_tagged_variant = variants
.iter()
.rposition(|variant| !variant.attrs.untagged());
if let Some(index_of_last_tagged_variant) = index_of_last_tagged_variant {
for variant in &variants[..index_of_last_tagged_variant] {
if variant.attrs.untagged() {
cx.error_spanned_by(&variant.ident, "all variants with the #[serde(untagged)] attribute must be placed at the end of the enum");
}
}
}
variants
}
fn struct_from_ast<'a>(
cx: &Ctxt,
fields: &'a syn::Fields,
attrs: Option<&attr::Variant>,
container_default: &attr::Default,
private: &Ident,
) -> (Style, Vec<Field<'a>>) {
match fields {
syn::Fields::Named(fields) => (
Style::Struct,
fields_from_ast(cx, &fields.named, attrs, container_default, private),
),
syn::Fields::Unnamed(fields) if fields.unnamed.len() == 1 => (
Style::Newtype,
fields_from_ast(cx, &fields.unnamed, attrs, container_default, private),
),
syn::Fields::Unnamed(fields) => (
Style::Tuple,
fields_from_ast(cx, &fields.unnamed, attrs, container_default, private),
),
syn::Fields::Unit => (Style::Unit, Vec::new()),
}
}
fn fields_from_ast<'a>(
cx: &Ctxt,
fields: &'a Punctuated<syn::Field, Token![,]>,
attrs: Option<&attr::Variant>,
container_default: &attr::Default,
private: &Ident,
) -> Vec<Field<'a>> {
fields
.iter()
.enumerate()
.map(|(i, field)| Field {
member: match &field.ident {
Some(ident) => syn::Member::Named(ident.clone()),
None => syn::Member::Unnamed(i.into()),
},
attrs: attr::Field::from_ast(cx, i, field, attrs, container_default, private),
ty: &field.ty,
original: field,
})
.collect()
}

1831
vendor/serde_derive/src/internals/attr.rs vendored Normal file
View File

File diff suppressed because it is too large Load Diff

200
vendor/serde_derive/src/internals/case.rs vendored Normal file
View File

@@ -0,0 +1,200 @@
//! Code to convert the Rust-styled field/variant (e.g. `my_field`, `MyType`) to the
//! case of the source (e.g. `my-field`, `MY_FIELD`).
use self::RenameRule::*;
use std::fmt::{self, Debug, Display};
/// The different possible ways to change case of fields in a struct, or variants in an enum.
#[derive(Copy, Clone, PartialEq)]
pub enum RenameRule {
/// Don't apply a default rename rule.
None,
/// Rename direct children to "lowercase" style.
LowerCase,
/// Rename direct children to "UPPERCASE" style.
UpperCase,
/// Rename direct children to "PascalCase" style, as typically used for
/// enum variants.
PascalCase,
/// Rename direct children to "camelCase" style.
CamelCase,
/// Rename direct children to "snake_case" style, as commonly used for
/// fields.
SnakeCase,
/// Rename direct children to "SCREAMING_SNAKE_CASE" style, as commonly
/// used for constants.
ScreamingSnakeCase,
/// Rename direct children to "kebab-case" style.
KebabCase,
/// Rename direct children to "SCREAMING-KEBAB-CASE" style.
ScreamingKebabCase,
}
static RENAME_RULES: &[(&str, RenameRule)] = &[
("lowercase", LowerCase),
("UPPERCASE", UpperCase),
("PascalCase", PascalCase),
("camelCase", CamelCase),
("snake_case", SnakeCase),
("SCREAMING_SNAKE_CASE", ScreamingSnakeCase),
("kebab-case", KebabCase),
("SCREAMING-KEBAB-CASE", ScreamingKebabCase),
];
impl RenameRule {
pub fn from_str(rename_all_str: &str) -> Result<Self, ParseError> {
for (name, rule) in RENAME_RULES {
if rename_all_str == *name {
return Ok(*rule);
}
}
Err(ParseError {
unknown: rename_all_str,
})
}
/// Apply a renaming rule to an enum variant, returning the version expected in the source.
pub fn apply_to_variant(self, variant: &str) -> String {
match self {
None | PascalCase => variant.to_owned(),
LowerCase => variant.to_ascii_lowercase(),
UpperCase => variant.to_ascii_uppercase(),
CamelCase => variant[..1].to_ascii_lowercase() + &variant[1..],
SnakeCase => {
let mut snake = String::new();
for (i, ch) in variant.char_indices() {
if i > 0 && ch.is_uppercase() {
snake.push('_');
}
snake.push(ch.to_ascii_lowercase());
}
snake
}
ScreamingSnakeCase => SnakeCase.apply_to_variant(variant).to_ascii_uppercase(),
KebabCase => SnakeCase.apply_to_variant(variant).replace('_', "-"),
ScreamingKebabCase => ScreamingSnakeCase
.apply_to_variant(variant)
.replace('_', "-"),
}
}
/// Apply a renaming rule to a struct field, returning the version expected in the source.
pub fn apply_to_field(self, field: &str) -> String {
match self {
None | LowerCase | SnakeCase => field.to_owned(),
UpperCase => field.to_ascii_uppercase(),
PascalCase => {
let mut pascal = String::new();
let mut capitalize = true;
for ch in field.chars() {
if ch == '_' {
capitalize = true;
} else if capitalize {
pascal.push(ch.to_ascii_uppercase());
capitalize = false;
} else {
pascal.push(ch);
}
}
pascal
}
CamelCase => {
let pascal = PascalCase.apply_to_field(field);
pascal[..1].to_ascii_lowercase() + &pascal[1..]
}
ScreamingSnakeCase => field.to_ascii_uppercase(),
KebabCase => field.replace('_', "-"),
ScreamingKebabCase => ScreamingSnakeCase.apply_to_field(field).replace('_', "-"),
}
}
/// Returns the `RenameRule` if it is not `None`, `rule_b` otherwise.
pub fn or(self, rule_b: Self) -> Self {
match self {
None => rule_b,
_ => self,
}
}
}
pub struct ParseError<'a> {
unknown: &'a str,
}
impl<'a> Display for ParseError<'a> {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
f.write_str("unknown rename rule `rename_all = ")?;
Debug::fmt(self.unknown, f)?;
f.write_str("`, expected one of ")?;
for (i, (name, _rule)) in RENAME_RULES.iter().enumerate() {
if i > 0 {
f.write_str(", ")?;
}
Debug::fmt(name, f)?;
}
Ok(())
}
}
#[test]
fn rename_variants() {
for &(original, lower, upper, camel, snake, screaming, kebab, screaming_kebab) in &[
(
"Outcome", "outcome", "OUTCOME", "outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
),
(
"VeryTasty",
"verytasty",
"VERYTASTY",
"veryTasty",
"very_tasty",
"VERY_TASTY",
"very-tasty",
"VERY-TASTY",
),
("A", "a", "A", "a", "a", "A", "a", "A"),
("Z42", "z42", "Z42", "z42", "z42", "Z42", "z42", "Z42"),
] {
assert_eq!(None.apply_to_variant(original), original);
assert_eq!(LowerCase.apply_to_variant(original), lower);
assert_eq!(UpperCase.apply_to_variant(original), upper);
assert_eq!(PascalCase.apply_to_variant(original), original);
assert_eq!(CamelCase.apply_to_variant(original), camel);
assert_eq!(SnakeCase.apply_to_variant(original), snake);
assert_eq!(ScreamingSnakeCase.apply_to_variant(original), screaming);
assert_eq!(KebabCase.apply_to_variant(original), kebab);
assert_eq!(
ScreamingKebabCase.apply_to_variant(original),
screaming_kebab
);
}
}
#[test]
fn rename_fields() {
for &(original, upper, pascal, camel, screaming, kebab, screaming_kebab) in &[
(
"outcome", "OUTCOME", "Outcome", "outcome", "OUTCOME", "outcome", "OUTCOME",
),
(
"very_tasty",
"VERY_TASTY",
"VeryTasty",
"veryTasty",
"VERY_TASTY",
"very-tasty",
"VERY-TASTY",
),
("a", "A", "A", "a", "A", "a", "A"),
("z42", "Z42", "Z42", "z42", "Z42", "z42", "Z42"),
] {
assert_eq!(None.apply_to_field(original), original);
assert_eq!(UpperCase.apply_to_field(original), upper);
assert_eq!(PascalCase.apply_to_field(original), pascal);
assert_eq!(CamelCase.apply_to_field(original), camel);
assert_eq!(SnakeCase.apply_to_field(original), original);
assert_eq!(ScreamingSnakeCase.apply_to_field(original), screaming);
assert_eq!(KebabCase.apply_to_field(original), kebab);
assert_eq!(ScreamingKebabCase.apply_to_field(original), screaming_kebab);
}
}

477
vendor/serde_derive/src/internals/check.rs vendored Normal file
View File

@@ -0,0 +1,477 @@
use crate::internals::ast::{Container, Data, Field, Style};
use crate::internals::attr::{Default, Identifier, TagType};
use crate::internals::{ungroup, Ctxt, Derive};
use syn::{Member, Type};
// Cross-cutting checks that require looking at more than a single attrs object.
// Simpler checks should happen when parsing and building the attrs.
pub fn check(cx: &Ctxt, cont: &mut Container, derive: Derive) {
check_default_on_tuple(cx, cont);
check_remote_generic(cx, cont);
check_getter(cx, cont);
check_flatten(cx, cont);
check_identifier(cx, cont);
check_variant_skip_attrs(cx, cont);
check_internal_tag_field_name_conflict(cx, cont);
check_adjacent_tag_conflict(cx, cont);
check_transparent(cx, cont, derive);
check_from_and_try_from(cx, cont);
}
// If some field of a tuple struct is marked #[serde(default)] then all fields
// after it must also be marked with that attribute, or the struct must have a
// container-level serde(default) attribute. A field's default value is only
// used for tuple fields if the sequence is exhausted at that point; that means
// all subsequent fields will fail to deserialize if they don't have their own
// default.
fn check_default_on_tuple(cx: &Ctxt, cont: &Container) {
if let Default::None = cont.attrs.default() {
if let Data::Struct(Style::Tuple, fields) = &cont.data {
let mut first_default_index = None;
for (i, field) in fields.iter().enumerate() {
// Skipped fields automatically get the #[serde(default)]
// attribute. We are interested only on non-skipped fields here.
if field.attrs.skip_deserializing() {
continue;
}
if let Default::None = field.attrs.default() {
if let Some(first) = first_default_index {
cx.error_spanned_by(
field.ty,
format!("field must have #[serde(default)] because previous field {} has #[serde(default)]", first),
);
}
continue;
}
if first_default_index.is_none() {
first_default_index = Some(i);
}
}
}
}
}
// Remote derive definition type must have either all of the generics of the
// remote type:
//
// #[serde(remote = "Generic")]
// struct Generic<T> {…}
//
// or none of them, i.e. defining impls for one concrete instantiation of the
// remote type only:
//
// #[serde(remote = "Generic<T>")]
// struct ConcreteDef {…}
//
fn check_remote_generic(cx: &Ctxt, cont: &Container) {
if let Some(remote) = cont.attrs.remote() {
let local_has_generic = !cont.generics.params.is_empty();
let remote_has_generic = !remote.segments.last().unwrap().arguments.is_none();
if local_has_generic && remote_has_generic {
cx.error_spanned_by(remote, "remove generic parameters from this path");
}
}
}
// Getters are only allowed inside structs (not enums) with the `remote`
// attribute.
fn check_getter(cx: &Ctxt, cont: &Container) {
match cont.data {
Data::Enum(_) => {
if cont.data.has_getter() {
cx.error_spanned_by(
cont.original,
"#[serde(getter = \"...\")] is not allowed in an enum",
);
}
}
Data::Struct(_, _) => {
if cont.data.has_getter() && cont.attrs.remote().is_none() {
cx.error_spanned_by(
cont.original,
"#[serde(getter = \"...\")] can only be used in structs that have #[serde(remote = \"...\")]",
);
}
}
}
}
// Flattening has some restrictions we can test.
fn check_flatten(cx: &Ctxt, cont: &Container) {
match &cont.data {
Data::Enum(variants) => {
for variant in variants {
for field in &variant.fields {
check_flatten_field(cx, variant.style, field);
}
}
}
Data::Struct(style, fields) => {
for field in fields {
check_flatten_field(cx, *style, field);
}
}
}
}
fn check_flatten_field(cx: &Ctxt, style: Style, field: &Field) {
if !field.attrs.flatten() {
return;
}
match style {
Style::Tuple => {
cx.error_spanned_by(
field.original,
"#[serde(flatten)] cannot be used on tuple structs",
);
}
Style::Newtype => {
cx.error_spanned_by(
field.original,
"#[serde(flatten)] cannot be used on newtype structs",
);
}
_ => {}
}
}
// The `other` attribute must be used at most once and it must be the last
// variant of an enum.
//
// Inside a `variant_identifier` all variants must be unit variants. Inside a
// `field_identifier` all but possibly one variant must be unit variants. The
// last variant may be a newtype variant which is an implicit "other" case.
fn check_identifier(cx: &Ctxt, cont: &Container) {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => return,
};
for (i, variant) in variants.iter().enumerate() {
match (
variant.style,
cont.attrs.identifier(),
variant.attrs.other(),
cont.attrs.tag(),
) {
// The `other` attribute may not be used in a variant_identifier.
(_, Identifier::Variant, true, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(other)] may not be used on a variant identifier",
);
}
// Variant with `other` attribute cannot appear in untagged enum
(_, Identifier::No, true, &TagType::None) => {
cx.error_spanned_by(
variant.original,
"#[serde(other)] cannot appear on untagged enum",
);
}
// Variant with `other` attribute must be the last one.
(Style::Unit, Identifier::Field, true, _) | (Style::Unit, Identifier::No, true, _) => {
if i < variants.len() - 1 {
cx.error_spanned_by(
variant.original,
"#[serde(other)] must be on the last variant",
);
}
}
// Variant with `other` attribute must be a unit variant.
(_, Identifier::Field, true, _) | (_, Identifier::No, true, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(other)] must be on a unit variant",
);
}
// Any sort of variant is allowed if this is not an identifier.
(_, Identifier::No, false, _) => {}
// Unit variant without `other` attribute is always fine.
(Style::Unit, _, false, _) => {}
// The last field is allowed to be a newtype catch-all.
(Style::Newtype, Identifier::Field, false, _) => {
if i < variants.len() - 1 {
cx.error_spanned_by(
variant.original,
format!("`{}` must be the last variant", variant.ident),
);
}
}
(_, Identifier::Field, false, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(field_identifier)] may only contain unit variants",
);
}
(_, Identifier::Variant, false, _) => {
cx.error_spanned_by(
variant.original,
"#[serde(variant_identifier)] may only contain unit variants",
);
}
}
}
}
// Skip-(de)serializing attributes are not allowed on variants marked
// (de)serialize_with.
fn check_variant_skip_attrs(cx: &Ctxt, cont: &Container) {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => return,
};
for variant in variants {
if variant.attrs.serialize_with().is_some() {
if variant.attrs.skip_serializing() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(serialize_with)] and #[serde(skip_serializing)]",
variant.ident
),
);
}
for field in &variant.fields {
let member = member_message(&field.member);
if field.attrs.skip_serializing() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(serialize_with)] and a field {} marked with #[serde(skip_serializing)]",
variant.ident, member
),
);
}
if field.attrs.skip_serializing_if().is_some() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(serialize_with)] and a field {} marked with #[serde(skip_serializing_if)]",
variant.ident, member
),
);
}
}
}
if variant.attrs.deserialize_with().is_some() {
if variant.attrs.skip_deserializing() {
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(deserialize_with)] and #[serde(skip_deserializing)]",
variant.ident
),
);
}
for field in &variant.fields {
if field.attrs.skip_deserializing() {
let member = member_message(&field.member);
cx.error_spanned_by(
variant.original,
format!(
"variant `{}` cannot have both #[serde(deserialize_with)] and a field {} marked with #[serde(skip_deserializing)]",
variant.ident, member
),
);
}
}
}
}
}
// The tag of an internally-tagged struct variant must not be the same as either
// one of its fields, as this would result in duplicate keys in the serialized
// output and/or ambiguity in the to-be-deserialized input.
fn check_internal_tag_field_name_conflict(cx: &Ctxt, cont: &Container) {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => return,
};
let tag = match cont.attrs.tag() {
TagType::Internal { tag } => tag.as_str(),
TagType::External | TagType::Adjacent { .. } | TagType::None => return,
};
let diagnose_conflict = || {
cx.error_spanned_by(
cont.original,
format!("variant field name `{}` conflicts with internal tag", tag),
);
};
for variant in variants {
match variant.style {
Style::Struct => {
if variant.attrs.untagged() {
continue;
}
for field in &variant.fields {
let check_ser =
!(field.attrs.skip_serializing() || variant.attrs.skip_serializing());
let check_de =
!(field.attrs.skip_deserializing() || variant.attrs.skip_deserializing());
let name = field.attrs.name();
let ser_name = name.serialize_name();
if check_ser && ser_name.value == tag {
diagnose_conflict();
return;
}
for de_name in field.attrs.aliases() {
if check_de && de_name.value == tag {
diagnose_conflict();
return;
}
}
}
}
Style::Unit | Style::Newtype | Style::Tuple => {}
}
}
}
// In the case of adjacently-tagged enums, the type and the contents tag must
// differ, for the same reason.
fn check_adjacent_tag_conflict(cx: &Ctxt, cont: &Container) {
let (type_tag, content_tag) = match cont.attrs.tag() {
TagType::Adjacent { tag, content } => (tag, content),
TagType::Internal { .. } | TagType::External | TagType::None => return,
};
if type_tag == content_tag {
cx.error_spanned_by(
cont.original,
format!(
"enum tags `{}` for type and content conflict with each other",
type_tag
),
);
}
}
// Enums and unit structs cannot be transparent.
fn check_transparent(cx: &Ctxt, cont: &mut Container, derive: Derive) {
if !cont.attrs.transparent() {
return;
}
if cont.attrs.type_from().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed with #[serde(from = \"...\")]",
);
}
if cont.attrs.type_try_from().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed with #[serde(try_from = \"...\")]",
);
}
if cont.attrs.type_into().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed with #[serde(into = \"...\")]",
);
}
let fields = match &mut cont.data {
Data::Enum(_) => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed on an enum",
);
return;
}
Data::Struct(Style::Unit, _) => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] is not allowed on a unit struct",
);
return;
}
Data::Struct(_, fields) => fields,
};
let mut transparent_field = None;
for field in fields {
if allow_transparent(field, derive) {
if transparent_field.is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] requires struct to have at most one transparent field",
);
return;
}
transparent_field = Some(field);
}
}
match transparent_field {
Some(transparent_field) => transparent_field.attrs.mark_transparent(),
None => match derive {
Derive::Serialize => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] requires at least one field that is not skipped",
);
}
Derive::Deserialize => {
cx.error_spanned_by(
cont.original,
"#[serde(transparent)] requires at least one field that is neither skipped nor has a default",
);
}
},
}
}
fn member_message(member: &Member) -> String {
match member {
Member::Named(ident) => format!("`{}`", ident),
Member::Unnamed(i) => format!("#{}", i.index),
}
}
fn allow_transparent(field: &Field, derive: Derive) -> bool {
if let Type::Path(ty) = ungroup(field.ty) {
if let Some(seg) = ty.path.segments.last() {
if seg.ident == "PhantomData" {
return false;
}
}
}
match derive {
Derive::Serialize => !field.attrs.skip_serializing(),
Derive::Deserialize => !field.attrs.skip_deserializing() && field.attrs.default().is_none(),
}
}
fn check_from_and_try_from(cx: &Ctxt, cont: &mut Container) {
if cont.attrs.type_from().is_some() && cont.attrs.type_try_from().is_some() {
cx.error_spanned_by(
cont.original,
"#[serde(from = \"...\")] and #[serde(try_from = \"...\")] conflict with each other",
);
}
}

68
vendor/serde_derive/src/internals/ctxt.rs vendored Normal file
View File

@@ -0,0 +1,68 @@
use quote::ToTokens;
use std::cell::RefCell;
use std::fmt::Display;
use std::thread;
/// A type to collect errors together and format them.
///
/// Dropping this object will cause a panic. It must be consumed using `check`.
///
/// References can be shared since this type uses run-time exclusive mut checking.
#[derive(Default)]
pub struct Ctxt {
// The contents will be set to `None` during checking. This is so that checking can be
// enforced.
errors: RefCell<Option<Vec<syn::Error>>>,
}
impl Ctxt {
/// Create a new context object.
///
/// This object contains no errors, but will still trigger a panic if it is not `check`ed.
pub fn new() -> Self {
Ctxt {
errors: RefCell::new(Some(Vec::new())),
}
}
/// Add an error to the context object with a tokenenizable object.
///
/// The object is used for spanning in error messages.
pub fn error_spanned_by<A: ToTokens, T: Display>(&self, obj: A, msg: T) {
self.errors
.borrow_mut()
.as_mut()
.unwrap()
// Curb monomorphization from generating too many identical methods.
.push(syn::Error::new_spanned(obj.into_token_stream(), msg));
}
/// Add one of Syn's parse errors.
pub fn syn_error(&self, err: syn::Error) {
self.errors.borrow_mut().as_mut().unwrap().push(err);
}
/// Consume this object, producing a formatted error string if there are errors.
pub fn check(self) -> syn::Result<()> {
let mut errors = self.errors.borrow_mut().take().unwrap().into_iter();
let mut combined = match errors.next() {
Some(first) => first,
None => return Ok(()),
};
for rest in errors {
combined.combine(rest);
}
Err(combined)
}
}
impl Drop for Ctxt {
fn drop(&mut self) {
if !thread::panicking() && self.errors.borrow().is_some() {
panic!("forgot to check for errors");
}
}
}

28
vendor/serde_derive/src/internals/mod.rs vendored Normal file
View File

@@ -0,0 +1,28 @@
pub mod ast;
pub mod attr;
pub mod name;
mod case;
mod check;
mod ctxt;
mod receiver;
mod respan;
mod symbol;
use syn::Type;
pub use self::ctxt::Ctxt;
pub use self::receiver::replace_receiver;
#[derive(Copy, Clone)]
pub enum Derive {
Serialize,
Deserialize,
}
pub fn ungroup(mut ty: &Type) -> &Type {
while let Type::Group(group) = ty {
ty = &group.elem;
}
ty
}

113
vendor/serde_derive/src/internals/name.rs vendored Normal file
View File

@@ -0,0 +1,113 @@
use crate::internals::attr::{Attr, VecAttr};
use proc_macro2::{Ident, Span, TokenStream};
use quote::ToTokens;
use std::cmp::Ordering;
use std::collections::BTreeSet;
use std::fmt::{self, Display};
use syn::LitStr;
pub struct MultiName {
pub(crate) serialize: Name,
pub(crate) serialize_renamed: bool,
pub(crate) deserialize: Name,
pub(crate) deserialize_renamed: bool,
pub(crate) deserialize_aliases: BTreeSet<Name>,
}
impl MultiName {
pub(crate) fn from_attrs(
source_name: Name,
ser_name: Attr<Name>,
de_name: Attr<Name>,
de_aliases: Option<VecAttr<Name>>,
) -> Self {
let mut alias_set = BTreeSet::new();
if let Some(de_aliases) = de_aliases {
for alias_name in de_aliases.get() {
alias_set.insert(alias_name);
}
}
let ser_name = ser_name.get();
let ser_renamed = ser_name.is_some();
let de_name = de_name.get();
let de_renamed = de_name.is_some();
MultiName {
serialize: ser_name.unwrap_or_else(|| source_name.clone()),
serialize_renamed: ser_renamed,
deserialize: de_name.unwrap_or(source_name),
deserialize_renamed: de_renamed,
deserialize_aliases: alias_set,
}
}
/// Return the container name for the container when serializing.
pub fn serialize_name(&self) -> &Name {
&self.serialize
}
/// Return the container name for the container when deserializing.
pub fn deserialize_name(&self) -> &Name {
&self.deserialize
}
pub(crate) fn deserialize_aliases(&self) -> &BTreeSet<Name> {
&self.deserialize_aliases
}
}
#[derive(Clone)]
pub struct Name {
pub value: String,
pub span: Span,
}
impl ToTokens for Name {
fn to_tokens(&self, tokens: &mut TokenStream) {
LitStr::new(&self.value, self.span).to_tokens(tokens);
}
}
impl Ord for Name {
fn cmp(&self, other: &Self) -> Ordering {
Ord::cmp(&self.value, &other.value)
}
}
impl PartialOrd for Name {
fn partial_cmp(&self, other: &Self) -> Option<Ordering> {
Some(Ord::cmp(self, other))
}
}
impl Eq for Name {}
impl PartialEq for Name {
fn eq(&self, other: &Self) -> bool {
self.value == other.value
}
}
impl From<&Ident> for Name {
fn from(ident: &Ident) -> Self {
Name {
value: ident.to_string(),
span: ident.span(),
}
}
}
impl From<&LitStr> for Name {
fn from(lit: &LitStr) -> Self {
Name {
value: lit.value(),
span: lit.span(),
}
}
}
impl Display for Name {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
Display::fmt(&self.value, formatter)
}
}

293
vendor/serde_derive/src/internals/receiver.rs vendored Normal file
View File

@@ -0,0 +1,293 @@
use crate::internals::respan::respan;
use proc_macro2::Span;
use quote::ToTokens;
use std::mem;
use syn::{
parse_quote, Data, DeriveInput, Expr, ExprPath, GenericArgument, GenericParam, Generics, Macro,
Path, PathArguments, QSelf, ReturnType, Token, Type, TypeParamBound, TypePath, WherePredicate,
};
pub fn replace_receiver(input: &mut DeriveInput) {
let self_ty = {
let ident = &input.ident;
let ty_generics = input.generics.split_for_impl().1;
parse_quote!(#ident #ty_generics)
};
let mut visitor = ReplaceReceiver(&self_ty);
visitor.visit_generics_mut(&mut input.generics);
visitor.visit_data_mut(&mut input.data);
}
struct ReplaceReceiver<'a>(&'a TypePath);
impl ReplaceReceiver<'_> {
fn self_ty(&self, span: Span) -> TypePath {
let tokens = self.0.to_token_stream();
let respanned = respan(tokens, span);
syn::parse2(respanned).unwrap()
}
fn self_to_qself(&self, qself: &mut Option<QSelf>, path: &mut Path) {
if path.leading_colon.is_some() || path.segments[0].ident != "Self" {
return;
}
if path.segments.len() == 1 {
self.self_to_expr_path(path);
return;
}
let span = path.segments[0].ident.span();
*qself = Some(QSelf {
lt_token: Token![<](span),
ty: Box::new(Type::Path(self.self_ty(span))),
position: 0,
as_token: None,
gt_token: Token![>](span),
});
path.leading_colon = Some(**path.segments.pairs().next().unwrap().punct().unwrap());
let segments = mem::take(&mut path.segments);
path.segments = segments.into_pairs().skip(1).collect();
}
fn self_to_expr_path(&self, path: &mut Path) {
let self_ty = self.self_ty(path.segments[0].ident.span());
let variant = mem::replace(path, self_ty.path);
for segment in &mut path.segments {
if let PathArguments::AngleBracketed(bracketed) = &mut segment.arguments {
if bracketed.colon2_token.is_none() && !bracketed.args.is_empty() {
bracketed.colon2_token = Some(<Token![::]>::default());
}
}
}
if variant.segments.len() > 1 {
path.segments.push_punct(<Token![::]>::default());
path.segments.extend(variant.segments.into_pairs().skip(1));
}
}
}
impl ReplaceReceiver<'_> {
// `Self` -> `Receiver`
fn visit_type_mut(&mut self, ty: &mut Type) {
let span = if let Type::Path(node) = ty {
if node.qself.is_none() && node.path.is_ident("Self") {
node.path.segments[0].ident.span()
} else {
self.visit_type_path_mut(node);
return;
}
} else {
self.visit_type_mut_impl(ty);
return;
};
*ty = Type::Path(self.self_ty(span));
}
// `Self::Assoc` -> `<Receiver>::Assoc`
fn visit_type_path_mut(&mut self, ty: &mut TypePath) {
if ty.qself.is_none() {
self.self_to_qself(&mut ty.qself, &mut ty.path);
}
self.visit_type_path_mut_impl(ty);
}
// `Self::method` -> `<Receiver>::method`
fn visit_expr_path_mut(&mut self, expr: &mut ExprPath) {
if expr.qself.is_none() {
self.self_to_qself(&mut expr.qself, &mut expr.path);
}
self.visit_expr_path_mut_impl(expr);
}
// Everything below is simply traversing the syntax tree.
fn visit_type_mut_impl(&mut self, ty: &mut Type) {
match ty {
#![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
Type::Array(ty) => {
self.visit_type_mut(&mut ty.elem);
self.visit_expr_mut(&mut ty.len);
}
Type::BareFn(ty) => {
for arg in &mut ty.inputs {
self.visit_type_mut(&mut arg.ty);
}
self.visit_return_type_mut(&mut ty.output);
}
Type::Group(ty) => self.visit_type_mut(&mut ty.elem),
Type::ImplTrait(ty) => {
for bound in &mut ty.bounds {
self.visit_type_param_bound_mut(bound);
}
}
Type::Macro(ty) => self.visit_macro_mut(&mut ty.mac),
Type::Paren(ty) => self.visit_type_mut(&mut ty.elem),
Type::Path(ty) => {
if let Some(qself) = &mut ty.qself {
self.visit_type_mut(&mut qself.ty);
}
self.visit_path_mut(&mut ty.path);
}
Type::Ptr(ty) => self.visit_type_mut(&mut ty.elem),
Type::Reference(ty) => self.visit_type_mut(&mut ty.elem),
Type::Slice(ty) => self.visit_type_mut(&mut ty.elem),
Type::TraitObject(ty) => {
for bound in &mut ty.bounds {
self.visit_type_param_bound_mut(bound);
}
}
Type::Tuple(ty) => {
for elem in &mut ty.elems {
self.visit_type_mut(elem);
}
}
Type::Infer(_) | Type::Never(_) | Type::Verbatim(_) => {}
_ => {}
}
}
fn visit_type_path_mut_impl(&mut self, ty: &mut TypePath) {
if let Some(qself) = &mut ty.qself {
self.visit_type_mut(&mut qself.ty);
}
self.visit_path_mut(&mut ty.path);
}
fn visit_expr_path_mut_impl(&mut self, expr: &mut ExprPath) {
if let Some(qself) = &mut expr.qself {
self.visit_type_mut(&mut qself.ty);
}
self.visit_path_mut(&mut expr.path);
}
fn visit_path_mut(&mut self, path: &mut Path) {
for segment in &mut path.segments {
self.visit_path_arguments_mut(&mut segment.arguments);
}
}
fn visit_path_arguments_mut(&mut self, arguments: &mut PathArguments) {
match arguments {
PathArguments::None => {}
PathArguments::AngleBracketed(arguments) => {
for arg in &mut arguments.args {
match arg {
#![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
GenericArgument::Type(arg) => self.visit_type_mut(arg),
GenericArgument::AssocType(arg) => self.visit_type_mut(&mut arg.ty),
GenericArgument::Lifetime(_)
| GenericArgument::Const(_)
| GenericArgument::AssocConst(_)
| GenericArgument::Constraint(_) => {}
_ => {}
}
}
}
PathArguments::Parenthesized(arguments) => {
for argument in &mut arguments.inputs {
self.visit_type_mut(argument);
}
self.visit_return_type_mut(&mut arguments.output);
}
}
}
fn visit_return_type_mut(&mut self, return_type: &mut ReturnType) {
match return_type {
ReturnType::Default => {}
ReturnType::Type(_, output) => self.visit_type_mut(output),
}
}
fn visit_type_param_bound_mut(&mut self, bound: &mut TypeParamBound) {
match bound {
#![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
TypeParamBound::Trait(bound) => self.visit_path_mut(&mut bound.path),
TypeParamBound::Lifetime(_)
| TypeParamBound::PreciseCapture(_)
| TypeParamBound::Verbatim(_) => {}
_ => {}
}
}
fn visit_generics_mut(&mut self, generics: &mut Generics) {
for param in &mut generics.params {
match param {
GenericParam::Type(param) => {
for bound in &mut param.bounds {
self.visit_type_param_bound_mut(bound);
}
}
GenericParam::Lifetime(_) | GenericParam::Const(_) => {}
}
}
if let Some(where_clause) = &mut generics.where_clause {
for predicate in &mut where_clause.predicates {
match predicate {
#![cfg_attr(all(test, exhaustive), deny(non_exhaustive_omitted_patterns))]
WherePredicate::Type(predicate) => {
self.visit_type_mut(&mut predicate.bounded_ty);
for bound in &mut predicate.bounds {
self.visit_type_param_bound_mut(bound);
}
}
WherePredicate::Lifetime(_) => {}
_ => {}
}
}
}
}
fn visit_data_mut(&mut self, data: &mut Data) {
match data {
Data::Struct(data) => {
for field in &mut data.fields {
self.visit_type_mut(&mut field.ty);
}
}
Data::Enum(data) => {
for variant in &mut data.variants {
for field in &mut variant.fields {
self.visit_type_mut(&mut field.ty);
}
}
}
Data::Union(_) => {}
}
}
fn visit_expr_mut(&mut self, expr: &mut Expr) {
match expr {
Expr::Binary(expr) => {
self.visit_expr_mut(&mut expr.left);
self.visit_expr_mut(&mut expr.right);
}
Expr::Call(expr) => {
self.visit_expr_mut(&mut expr.func);
for arg in &mut expr.args {
self.visit_expr_mut(arg);
}
}
Expr::Cast(expr) => {
self.visit_expr_mut(&mut expr.expr);
self.visit_type_mut(&mut expr.ty);
}
Expr::Field(expr) => self.visit_expr_mut(&mut expr.base),
Expr::Index(expr) => {
self.visit_expr_mut(&mut expr.expr);
self.visit_expr_mut(&mut expr.index);
}
Expr::Paren(expr) => self.visit_expr_mut(&mut expr.expr),
Expr::Path(expr) => self.visit_expr_path_mut(expr),
Expr::Unary(expr) => self.visit_expr_mut(&mut expr.expr),
_ => {}
}
}
fn visit_macro_mut(&mut self, _mac: &mut Macro) {}
}

16
vendor/serde_derive/src/internals/respan.rs vendored Normal file
View File

@@ -0,0 +1,16 @@
use proc_macro2::{Group, Span, TokenStream, TokenTree};
pub(crate) fn respan(stream: TokenStream, span: Span) -> TokenStream {
stream
.into_iter()
.map(|token| respan_token(token, span))
.collect()
}
fn respan_token(mut token: TokenTree, span: Span) -> TokenTree {
if let TokenTree::Group(g) = &mut token {
*g = Group::new(g.delimiter(), respan(g.stream(), span));
}
token.set_span(span);
token
}

71
vendor/serde_derive/src/internals/symbol.rs vendored Normal file
View File

@@ -0,0 +1,71 @@
use std::fmt::{self, Display};
use syn::{Ident, Path};
#[derive(Copy, Clone)]
pub struct Symbol(&'static str);
pub const ALIAS: Symbol = Symbol("alias");
pub const BORROW: Symbol = Symbol("borrow");
pub const BOUND: Symbol = Symbol("bound");
pub const CONTENT: Symbol = Symbol("content");
pub const CRATE: Symbol = Symbol("crate");
pub const DEFAULT: Symbol = Symbol("default");
pub const DENY_UNKNOWN_FIELDS: Symbol = Symbol("deny_unknown_fields");
pub const DESERIALIZE: Symbol = Symbol("deserialize");
pub const DESERIALIZE_WITH: Symbol = Symbol("deserialize_with");
pub const EXPECTING: Symbol = Symbol("expecting");
pub const FIELD_IDENTIFIER: Symbol = Symbol("field_identifier");
pub const FLATTEN: Symbol = Symbol("flatten");
pub const FROM: Symbol = Symbol("from");
pub const GETTER: Symbol = Symbol("getter");
pub const INTO: Symbol = Symbol("into");
pub const NON_EXHAUSTIVE: Symbol = Symbol("non_exhaustive");
pub const OTHER: Symbol = Symbol("other");
pub const REMOTE: Symbol = Symbol("remote");
pub const RENAME: Symbol = Symbol("rename");
pub const RENAME_ALL: Symbol = Symbol("rename_all");
pub const RENAME_ALL_FIELDS: Symbol = Symbol("rename_all_fields");
pub const REPR: Symbol = Symbol("repr");
pub const SERDE: Symbol = Symbol("serde");
pub const SERIALIZE: Symbol = Symbol("serialize");
pub const SERIALIZE_WITH: Symbol = Symbol("serialize_with");
pub const SKIP: Symbol = Symbol("skip");
pub const SKIP_DESERIALIZING: Symbol = Symbol("skip_deserializing");
pub const SKIP_SERIALIZING: Symbol = Symbol("skip_serializing");
pub const SKIP_SERIALIZING_IF: Symbol = Symbol("skip_serializing_if");
pub const TAG: Symbol = Symbol("tag");
pub const TRANSPARENT: Symbol = Symbol("transparent");
pub const TRY_FROM: Symbol = Symbol("try_from");
pub const UNTAGGED: Symbol = Symbol("untagged");
pub const VARIANT_IDENTIFIER: Symbol = Symbol("variant_identifier");
pub const WITH: Symbol = Symbol("with");
impl PartialEq<Symbol> for Ident {
fn eq(&self, word: &Symbol) -> bool {
self == word.0
}
}
impl PartialEq<Symbol> for &Ident {
fn eq(&self, word: &Symbol) -> bool {
*self == word.0
}
}
impl PartialEq<Symbol> for Path {
fn eq(&self, word: &Symbol) -> bool {
self.is_ident(word.0)
}
}
impl PartialEq<Symbol> for &Path {
fn eq(&self, word: &Symbol) -> bool {
self.is_ident(word.0)
}
}
impl Display for Symbol {
fn fmt(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str(self.0)
}
}

127
vendor/serde_derive/src/lib.rs vendored Normal file
View File

@@ -0,0 +1,127 @@
//! This crate provides Serde's two derive macros.
//!
//! ```edition2021
//! # use serde_derive::{Deserialize, Serialize};
//! #
//! #[derive(Serialize, Deserialize)]
//! # struct S;
//! #
//! # fn main() {}
//! ```
//!
//! Please refer to [https://serde.rs/derive.html] for how to set this up.
//!
//! [https://serde.rs/derive.html]: https://serde.rs/derive.html
#![doc(html_root_url = "https://docs.rs/serde_derive/1.0.227")]
#![cfg_attr(not(check_cfg), allow(unexpected_cfgs))]
// Ignored clippy lints
#![allow(
// clippy false positive: https://github.com/rust-lang/rust-clippy/issues/7054
clippy::branches_sharing_code,
clippy::cognitive_complexity,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/7575
clippy::collapsible_match,
clippy::derive_partial_eq_without_eq,
clippy::enum_variant_names,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/6797
clippy::manual_map,
clippy::match_like_matches_macro,
clippy::needless_lifetimes,
clippy::needless_pass_by_value,
clippy::too_many_arguments,
clippy::trivially_copy_pass_by_ref,
clippy::used_underscore_binding,
clippy::wildcard_in_or_patterns,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
clippy::unnested_or_patterns,
)]
// Ignored clippy_pedantic lints
#![allow(
clippy::cast_possible_truncation,
clippy::checked_conversions,
clippy::doc_markdown,
clippy::elidable_lifetime_names,
clippy::enum_glob_use,
clippy::indexing_slicing,
clippy::items_after_statements,
clippy::let_underscore_untyped,
clippy::manual_assert,
clippy::map_err_ignore,
clippy::match_same_arms,
// clippy bug: https://github.com/rust-lang/rust-clippy/issues/6984
clippy::match_wildcard_for_single_variants,
clippy::module_name_repetitions,
clippy::must_use_candidate,
clippy::similar_names,
clippy::single_match_else,
clippy::struct_excessive_bools,
clippy::too_many_lines,
clippy::uninlined_format_args,
clippy::unseparated_literal_suffix,
clippy::unused_self,
clippy::use_self,
clippy::wildcard_imports
)]
#![cfg_attr(all(test, exhaustive), feature(non_exhaustive_omitted_patterns_lint))]
#![allow(unknown_lints, mismatched_lifetime_syntaxes)]
extern crate proc_macro2;
extern crate quote;
extern crate syn;
extern crate proc_macro;
mod internals;
use proc_macro::TokenStream;
use proc_macro2::{Ident, Span};
use quote::{ToTokens, TokenStreamExt as _};
use syn::parse_macro_input;
use syn::DeriveInput;
#[macro_use]
mod bound;
#[macro_use]
mod fragment;
mod de;
mod deprecated;
mod dummy;
mod pretend;
mod ser;
mod this;
#[allow(non_camel_case_types)]
struct private;
impl private {
fn ident(&self) -> Ident {
Ident::new(
concat!("__private", env!("CARGO_PKG_VERSION_PATCH")),
Span::call_site(),
)
}
}
impl ToTokens for private {
fn to_tokens(&self, tokens: &mut proc_macro2::TokenStream) {
tokens.append(self.ident());
}
}
#[proc_macro_derive(Serialize, attributes(serde))]
pub fn derive_serialize(input: TokenStream) -> TokenStream {
let mut input = parse_macro_input!(input as DeriveInput);
ser::expand_derive_serialize(&mut input)
.unwrap_or_else(syn::Error::into_compile_error)
.into()
}
#[proc_macro_derive(Deserialize, attributes(serde))]
pub fn derive_deserialize(input: TokenStream) -> TokenStream {
let mut input = parse_macro_input!(input as DeriveInput);
de::expand_derive_deserialize(&mut input)
.unwrap_or_else(syn::Error::into_compile_error)
.into()
}

188
vendor/serde_derive/src/pretend.rs vendored Normal file
View File

@@ -0,0 +1,188 @@
use crate::internals::ast::{Container, Data, Field, Style, Variant};
use crate::private;
use proc_macro2::TokenStream;
use quote::{format_ident, quote};
// Suppress dead_code warnings that would otherwise appear when using a remote
// derive. Other than this pretend code, a struct annotated with remote derive
// never has its fields referenced and an enum annotated with remote derive
// never has its variants constructed.
//
// warning: field is never used: `i`
// --> src/main.rs:4:20
// |
// 4 | struct StructDef { i: i32 }
// | ^^^^^^
//
// warning: variant is never constructed: `V`
// --> src/main.rs:8:16
// |
// 8 | enum EnumDef { V }
// | ^
//
pub fn pretend_used(cont: &Container, is_packed: bool) -> TokenStream {
let pretend_fields = pretend_fields_used(cont, is_packed);
let pretend_variants = pretend_variants_used(cont);
quote! {
#pretend_fields
#pretend_variants
}
}
// For structs with named fields, expands to:
//
// match None::<&T> {
// Some(T { a: __v0, b: __v1 }) => {}
// _ => {}
// }
//
// For packed structs on sufficiently new rustc, expands to:
//
// match None::<&T> {
// Some(__v @ T { a: _, b: _ }) => {
// let _ = addr_of!(__v.a);
// let _ = addr_of!(__v.b);
// }
// _ => {}
// }
//
// For packed structs on older rustc, we assume Sized and !Drop, and expand to:
//
// match None::<T> {
// Some(T { a: __v0, b: __v1 }) => {}
// _ => {}
// }
//
// For enums, expands to the following but only including struct variants:
//
// match None::<&T> {
// Some(T::A { a: __v0 }) => {}
// Some(T::B { b: __v0 }) => {}
// _ => {}
// }
//
fn pretend_fields_used(cont: &Container, is_packed: bool) -> TokenStream {
match &cont.data {
Data::Enum(variants) => pretend_fields_used_enum(cont, variants),
Data::Struct(Style::Struct | Style::Tuple | Style::Newtype, fields) => {
if is_packed {
pretend_fields_used_struct_packed(cont, fields)
} else {
pretend_fields_used_struct(cont, fields)
}
}
Data::Struct(Style::Unit, _) => quote!(),
}
}
fn pretend_fields_used_struct(cont: &Container, fields: &[Field]) -> TokenStream {
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let members = fields.iter().map(|field| &field.member);
let placeholders = (0usize..).map(|i| format_ident!("__v{}", i));
quote! {
match _serde::#private::None::<&#type_ident #ty_generics> {
_serde::#private::Some(#type_ident { #(#members: #placeholders),* }) => {}
_ => {}
}
}
}
fn pretend_fields_used_struct_packed(cont: &Container, fields: &[Field]) -> TokenStream {
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let members = fields.iter().map(|field| &field.member).collect::<Vec<_>>();
let private2 = private;
quote! {
match _serde::#private::None::<&#type_ident #ty_generics> {
_serde::#private::Some(__v @ #type_ident { #(#members: _),* }) => {
#(
let _ = _serde::#private2::ptr::addr_of!(__v.#members);
)*
}
_ => {}
}
}
}
fn pretend_fields_used_enum(cont: &Container, variants: &[Variant]) -> TokenStream {
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let patterns = variants
.iter()
.filter_map(|variant| match variant.style {
Style::Struct | Style::Tuple | Style::Newtype => {
let variant_ident = &variant.ident;
let members = variant.fields.iter().map(|field| &field.member);
let placeholders = (0usize..).map(|i| format_ident!("__v{}", i));
Some(quote!(#type_ident::#variant_ident { #(#members: #placeholders),* }))
}
Style::Unit => None,
})
.collect::<Vec<_>>();
let private2 = private;
quote! {
match _serde::#private::None::<&#type_ident #ty_generics> {
#(
_serde::#private2::Some(#patterns) => {}
)*
_ => {}
}
}
}
// Expands to one of these per enum variant:
//
// match None {
// Some((__v0, __v1,)) => {
// let _ = E::V { a: __v0, b: __v1 };
// }
// _ => {}
// }
//
fn pretend_variants_used(cont: &Container) -> TokenStream {
let variants = match &cont.data {
Data::Enum(variants) => variants,
Data::Struct(_, _) => {
return quote!();
}
};
let type_ident = &cont.ident;
let (_, ty_generics, _) = cont.generics.split_for_impl();
let turbofish = ty_generics.as_turbofish();
let cases = variants.iter().map(|variant| {
let variant_ident = &variant.ident;
let placeholders = &(0..variant.fields.len())
.map(|i| format_ident!("__v{}", i))
.collect::<Vec<_>>();
let pat = match variant.style {
Style::Struct => {
let members = variant.fields.iter().map(|field| &field.member);
quote!({ #(#members: #placeholders),* })
}
Style::Tuple | Style::Newtype => quote!(( #(#placeholders),* )),
Style::Unit => quote!(),
};
quote! {
match _serde::#private::None {
_serde::#private::Some((#(#placeholders,)*)) => {
let _ = #type_ident::#variant_ident #turbofish #pat;
}
_ => {}
}
}
});
quote!(#(#cases)*)
}

1369
vendor/serde_derive/src/ser.rs vendored Normal file
View File

File diff suppressed because it is too large Load Diff

32
vendor/serde_derive/src/this.rs vendored Normal file
View File

@@ -0,0 +1,32 @@
use crate::internals::ast::Container;
use syn::{Path, PathArguments, Token};
pub fn this_type(cont: &Container) -> Path {
if let Some(remote) = cont.attrs.remote() {
let mut this = remote.clone();
for segment in &mut this.segments {
if let PathArguments::AngleBracketed(arguments) = &mut segment.arguments {
arguments.colon2_token = None;
}
}
this
} else {
Path::from(cont.ident.clone())
}
}
pub fn this_value(cont: &Container) -> Path {
if let Some(remote) = cont.attrs.remote() {
let mut this = remote.clone();
for segment in &mut this.segments {
if let PathArguments::AngleBracketed(arguments) = &mut segment.arguments {
if arguments.colon2_token.is_none() {
arguments.colon2_token = Some(Token![::](arguments.lt_token.span));
}
}
}
this
} else {
Path::from(cont.ident.clone())
}
}