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Vendor dependencies for 0.3.0 release

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Robert Garrett
2025-09-27 10:29:08 -05:00
parent 0c8d39d483
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To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "{}"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright {yyyy} {name of copyright owner}
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

19
vendor/toml_parser/LICENSE-MIT vendored Normal file
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Copyright (c) Individual contributors
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.

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# toml_parser
[![Build Status](https://github.com/toml-rs/toml/workflows/Continuous%20integration/badge.svg)](https://github.com/toml-rs/toml/actions)
[![codecov](https://codecov.io/gh/toml-rs/toml/branch/master/graph/badge.svg)](https://codecov.io/gh/toml-rs/toml)
[![crates.io](https://img.shields.io/crates/v/toml_parser.svg)](https://crates.io/crates/toml_parser)
[![docs](https://docs.rs/toml_parser/badge.svg)](https://docs.rs/toml_parser)
[![Join the chat at https://gitter.im/toml_parser/Lobby](https://badges.gitter.im/a.svg)](https://gitter.im/toml_parser/Lobby)
Zero-copy parsing of TOML
## License
Licensed under either of
* Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or <https://www.apache.org/licenses/LICENSE-2.0>)
* MIT license ([LICENSE-MIT](LICENSE-MIT) or <https://opensource.org/license/mit>)
at your option.
### Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.

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use crate::decoder::Encoding;
use crate::ErrorSink;
use crate::Span;
pub(crate) struct DebugDepth(core::sync::atomic::AtomicUsize);
impl DebugDepth {
pub(crate) fn enter_unchecked(&self) -> usize {
self.0.fetch_add(1, core::sync::atomic::Ordering::SeqCst)
}
pub(crate) fn exit_unchecked(&self) {
let _ = self.0.fetch_sub(1, core::sync::atomic::Ordering::SeqCst);
}
pub(crate) fn depth(&self) -> usize {
self.0.load(core::sync::atomic::Ordering::SeqCst)
}
}
static DEBUG_DEPTH: DebugDepth = DebugDepth(core::sync::atomic::AtomicUsize::new(0));
fn render_event(span: impl Into<Option<Span>>, text: &str, style: anstyle::Style) {
#![allow(unexpected_cfgs)] // HACK: fixed in newer versions
let span = span.into();
let depth = DEBUG_DEPTH.depth().min(20);
anstream::eprintln!("{:depth$}{style}{text}: {span:?}{style:#}", "");
}
pub(crate) struct DebugErrorSink<'s> {
sink: &'s mut dyn ErrorSink,
}
impl<'s> DebugErrorSink<'s> {
pub(crate) fn new(sink: &'s mut dyn ErrorSink) -> Self {
Self { sink }
}
}
impl ErrorSink for DebugErrorSink<'_> {
fn report_error(&mut self, error: crate::ParseError) {
render_event(
error.unexpected(),
&format!("{error:?}"),
anstyle::AnsiColor::Red.on_default(),
);
self.sink.report_error(error);
}
}
pub(crate) struct DebugEventReceiver<'r> {
receiver: &'r mut dyn crate::parser::EventReceiver,
}
impl<'r> DebugEventReceiver<'r> {
pub(crate) fn new(receiver: &'r mut dyn crate::parser::EventReceiver) -> Self {
Self { receiver }
}
}
impl crate::parser::EventReceiver for DebugEventReceiver<'_> {
fn std_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.std_table_open(span, error);
render_event(span, "[", anstyle::Style::new() | anstyle::Effects::DIMMED);
DEBUG_DEPTH.enter_unchecked();
}
fn std_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.std_table_close(span, error);
DEBUG_DEPTH.exit_unchecked();
render_event(span, "]", anstyle::Style::new() | anstyle::Effects::DIMMED);
}
fn array_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_table_open(span, error);
render_event(span, "[[", anstyle::Style::new() | anstyle::Effects::DIMMED);
DEBUG_DEPTH.enter_unchecked();
}
fn array_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_table_close(span, error);
DEBUG_DEPTH.exit_unchecked();
render_event(span, "]]", anstyle::Style::new() | anstyle::Effects::DIMMED);
}
fn inline_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) -> bool {
let allowed = self.receiver.inline_table_open(span, error);
render_event(span, "{", anstyle::Style::new() | anstyle::Effects::DIMMED);
DEBUG_DEPTH.enter_unchecked();
allowed
}
fn inline_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.inline_table_close(span, error);
DEBUG_DEPTH.exit_unchecked();
render_event(span, "}", anstyle::Style::new() | anstyle::Effects::DIMMED);
}
fn array_open(&mut self, span: Span, error: &mut dyn ErrorSink) -> bool {
let allowed = self.receiver.array_open(span, error);
render_event(span, "[", anstyle::Style::new() | anstyle::Effects::DIMMED);
DEBUG_DEPTH.enter_unchecked();
allowed
}
fn array_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_close(span, error);
DEBUG_DEPTH.exit_unchecked();
render_event(span, "]", anstyle::Style::new() | anstyle::Effects::DIMMED);
}
fn simple_key(&mut self, span: Span, encoding: Option<Encoding>, error: &mut dyn ErrorSink) {
self.receiver.simple_key(span, encoding, error);
render_event(span, "<key>", anstyle::AnsiColor::Magenta.on_default());
}
fn key_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.key_sep(span, error);
render_event(span, ".", anstyle::Style::new() | anstyle::Effects::DIMMED);
}
fn key_val_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.key_val_sep(span, error);
render_event(span, "=", anstyle::Style::new() | anstyle::Effects::DIMMED);
}
fn scalar(&mut self, span: Span, encoding: Option<Encoding>, error: &mut dyn ErrorSink) {
self.receiver.scalar(span, encoding, error);
render_event(span, "<scalar>", anstyle::AnsiColor::Green.on_default());
}
fn value_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.value_sep(span, error);
render_event(span, ",", anstyle::Style::new() | anstyle::Effects::DIMMED);
}
fn whitespace(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.whitespace(span, error);
render_event(span, "<whitespace>", anstyle::AnsiColor::Cyan.on_default());
}
fn comment(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.comment(span, error);
render_event(span, "<comment>", anstyle::AnsiColor::Cyan.on_default());
}
fn newline(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.newline(span, error);
render_event(span, "<newline>", anstyle::AnsiColor::Cyan.on_default());
}
fn error(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.error(span, error);
render_event(span, "<error>", anstyle::AnsiColor::Red.on_default());
}
}

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//! Decode [raw][crate::Raw] TOML values into Rust native types
//!
//! See
//! - [`Raw::decode_key`][crate::Raw::decode_key]
//! - [`Raw::decode_scalar`][crate::Raw::decode_scalar]
//! - [`Raw::decode_whitespace`][crate::Raw::decode_whitespace]
//! - [`Raw::decode_comment`][crate::Raw::decode_comment]
//! - [`Raw::decode_newline`][crate::Raw::decode_newline]
#[cfg(feature = "alloc")]
use alloc::borrow::Cow;
#[cfg(feature = "alloc")]
use alloc::string::String;
pub(crate) mod scalar;
pub(crate) mod string;
pub(crate) mod ws;
pub use scalar::IntegerRadix;
pub use scalar::ScalarKind;
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[repr(u8)]
pub enum Encoding {
LiteralString = crate::lexer::APOSTROPHE,
BasicString = crate::lexer::QUOTATION_MARK,
MlLiteralString = 1,
MlBasicString,
}
impl Encoding {
pub const fn description(&self) -> &'static str {
match self {
Self::LiteralString => crate::lexer::TokenKind::LiteralString.description(),
Self::BasicString => crate::lexer::TokenKind::BasicString.description(),
Self::MlLiteralString => crate::lexer::TokenKind::MlLiteralString.description(),
Self::MlBasicString => crate::lexer::TokenKind::MlBasicString.description(),
}
}
}
pub trait StringBuilder<'s> {
fn clear(&mut self);
#[must_use]
fn push_str(&mut self, append: &'s str) -> bool;
#[must_use]
fn push_char(&mut self, append: char) -> bool;
}
impl<'s> StringBuilder<'s> for () {
fn clear(&mut self) {}
fn push_str(&mut self, _append: &'s str) -> bool {
true
}
fn push_char(&mut self, _append: char) -> bool {
true
}
}
impl<'s> StringBuilder<'s> for &'s str {
fn clear(&mut self) {
*self = &self[0..0];
}
fn push_str(&mut self, append: &'s str) -> bool {
if self.is_empty() {
*self = append;
true
} else {
false
}
}
fn push_char(&mut self, _append: char) -> bool {
false
}
}
#[cfg(feature = "alloc")]
impl<'s> StringBuilder<'s> for Cow<'s, str> {
fn clear(&mut self) {
match self {
Cow::Borrowed(s) => {
s.clear();
}
Cow::Owned(s) => s.clear(),
}
}
fn push_str(&mut self, append: &'s str) -> bool {
match self {
Cow::Borrowed(s) => {
if !s.push_str(append) {
self.to_mut().push_str(append);
}
}
Cow::Owned(s) => s.push_str(append),
}
true
}
fn push_char(&mut self, append: char) -> bool {
self.to_mut().push(append);
true
}
}
#[cfg(feature = "alloc")]
impl<'s> StringBuilder<'s> for String {
fn clear(&mut self) {
self.clear();
}
fn push_str(&mut self, append: &'s str) -> bool {
self.push_str(append);
true
}
fn push_char(&mut self, append: char) -> bool {
self.push(append);
true
}
}

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use winnow::stream::ContainsToken as _;
use winnow::stream::FindSlice as _;
use winnow::stream::Offset as _;
use winnow::stream::Stream as _;
use crate::decoder::StringBuilder;
use crate::ErrorSink;
use crate::Expected;
use crate::ParseError;
use crate::Raw;
use crate::Span;
const ALLOCATION_ERROR: &str = "could not allocate for string";
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub enum ScalarKind {
String,
Boolean(bool),
DateTime,
Float,
Integer(IntegerRadix),
}
impl ScalarKind {
pub fn description(&self) -> &'static str {
match self {
Self::String => "string",
Self::Boolean(_) => "boolean",
Self::DateTime => "date-time",
Self::Float => "float",
Self::Integer(radix) => radix.description(),
}
}
pub fn invalid_description(&self) -> &'static str {
match self {
Self::String => "invalid string",
Self::Boolean(_) => "invalid boolean",
Self::DateTime => "invalid date-time",
Self::Float => "invalid float",
Self::Integer(radix) => radix.invalid_description(),
}
}
}
#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub enum IntegerRadix {
#[default]
Dec,
Hex,
Oct,
Bin,
}
impl IntegerRadix {
pub fn description(&self) -> &'static str {
match self {
Self::Dec => "integer",
Self::Hex => "hexadecimal",
Self::Oct => "octal",
Self::Bin => "binary",
}
}
pub fn value(&self) -> u32 {
match self {
Self::Dec => 10,
Self::Hex => 16,
Self::Oct => 8,
Self::Bin => 2,
}
}
pub fn invalid_description(&self) -> &'static str {
match self {
Self::Dec => "invalid integer number",
Self::Hex => "invalid hexadecimal number",
Self::Oct => "invalid octal number",
Self::Bin => "invalid binary number",
}
}
fn validator(&self) -> fn(char) -> bool {
match self {
Self::Dec => |c| c.is_ascii_digit(),
Self::Hex => |c| c.is_ascii_hexdigit(),
Self::Oct => |c| matches!(c, '0'..='7'),
Self::Bin => |c| matches!(c, '0'..='1'),
}
}
}
pub(crate) fn decode_unquoted_scalar<'i>(
raw: Raw<'i>,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
let s = raw.as_str();
let Some(first) = s.as_bytes().first() else {
return decode_invalid(raw, output, error);
};
match first {
// number starts
b'+' | b'-' => {
let value = &raw.as_str()[1..];
decode_sign_prefix(raw, value, output, error)
}
// Report as if they were numbers because its most likely a typo
b'_' => decode_datetime_or_float_or_integer(raw.as_str(), raw, output, error),
// Date/number starts
b'0' => decode_zero_prefix(raw.as_str(), false, raw, output, error),
b'1'..=b'9' => decode_datetime_or_float_or_integer(raw.as_str(), raw, output, error),
// Report as if they were numbers because its most likely a typo
b'.' => {
let kind = ScalarKind::Float;
let stream = raw.as_str();
ensure_float(stream, raw, error);
decode_float_or_integer(stream, raw, kind, output, error)
}
b't' | b'T' => {
const SYMBOL: &str = "true";
let kind = ScalarKind::Boolean(true);
let expected = &[Expected::Literal(SYMBOL)];
decode_symbol(raw, SYMBOL, kind, expected, output, error)
}
b'f' | b'F' => {
const SYMBOL: &str = "false";
let kind = ScalarKind::Boolean(false);
let expected = &[Expected::Literal(SYMBOL)];
decode_symbol(raw, SYMBOL, kind, expected, output, error)
}
b'i' | b'I' => {
const SYMBOL: &str = "inf";
let kind = ScalarKind::Float;
let expected = &[Expected::Literal(SYMBOL)];
decode_symbol(raw, SYMBOL, kind, expected, output, error)
}
b'n' | b'N' => {
const SYMBOL: &str = "nan";
let kind = ScalarKind::Float;
let expected = &[Expected::Literal(SYMBOL)];
decode_symbol(raw, SYMBOL, kind, expected, output, error)
}
_ => decode_invalid(raw, output, error),
}
}
pub(crate) fn decode_sign_prefix<'i>(
raw: Raw<'i>,
value: &'i str,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
let Some(first) = value.as_bytes().first() else {
return decode_invalid(raw, output, error);
};
match first {
// number starts
b'+' | b'-' => {
let start = value.offset_from(&raw.as_str());
let end = start + 1;
error.report_error(
ParseError::new("redundant numeric sign")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(start, end)),
);
let value = &value[1..];
decode_sign_prefix(raw, value, output, error)
}
// Report as if they were numbers because its most likely a typo
b'_' => decode_datetime_or_float_or_integer(value, raw, output, error),
// Date/number starts
b'0' => decode_zero_prefix(value, true, raw, output, error),
b'1'..=b'9' => decode_datetime_or_float_or_integer(value, raw, output, error),
// Report as if they were numbers because its most likely a typo
b'.' => {
let kind = ScalarKind::Float;
let stream = raw.as_str();
ensure_float(stream, raw, error);
decode_float_or_integer(stream, raw, kind, output, error)
}
b'i' | b'I' => {
const SYMBOL: &str = "inf";
let kind = ScalarKind::Float;
if value != SYMBOL {
let expected = &[Expected::Literal(SYMBOL)];
let start = value.offset_from(&raw.as_str());
let end = start + value.len();
error.report_error(
ParseError::new(kind.invalid_description())
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(expected)
.with_unexpected(Span::new_unchecked(start, end)),
);
decode_as(raw, SYMBOL, kind, output, error)
} else {
decode_as_is(raw, kind, output, error)
}
}
b'n' | b'N' => {
const SYMBOL: &str = "nan";
let kind = ScalarKind::Float;
if value != SYMBOL {
let expected = &[Expected::Literal(SYMBOL)];
let start = value.offset_from(&raw.as_str());
let end = start + value.len();
error.report_error(
ParseError::new(kind.invalid_description())
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(expected)
.with_unexpected(Span::new_unchecked(start, end)),
);
decode_as(raw, SYMBOL, kind, output, error)
} else {
decode_as_is(raw, kind, output, error)
}
}
_ => decode_invalid(raw, output, error),
}
}
pub(crate) fn decode_zero_prefix<'i>(
value: &'i str,
signed: bool,
raw: Raw<'i>,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
debug_assert_eq!(value.as_bytes()[0], b'0');
if value.len() == 1 {
let kind = ScalarKind::Integer(IntegerRadix::Dec);
// No extra validation needed
decode_float_or_integer(raw.as_str(), raw, kind, output, error)
} else {
let radix = value.as_bytes()[1];
match radix {
b'x' | b'X' => {
if signed {
error.report_error(
ParseError::new("integers with a radix cannot be signed")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(0, 1)),
);
}
if radix == b'X' {
let start = value.offset_from(&raw.as_str());
let end = start + 2;
error.report_error(
ParseError::new("radix must be lowercase")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal("0x")])
.with_unexpected(Span::new_unchecked(start, end)),
);
}
let radix = IntegerRadix::Hex;
let kind = ScalarKind::Integer(radix);
let stream = &value[2..];
ensure_radixed_value(stream, raw, radix, error);
decode_float_or_integer(stream, raw, kind, output, error)
}
b'o' | b'O' => {
if signed {
error.report_error(
ParseError::new("integers with a radix cannot be signed")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(0, 1)),
);
}
if radix == b'O' {
let start = value.offset_from(&raw.as_str());
let end = start + 2;
error.report_error(
ParseError::new("radix must be lowercase")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal("0o")])
.with_unexpected(Span::new_unchecked(start, end)),
);
}
let radix = IntegerRadix::Oct;
let kind = ScalarKind::Integer(radix);
let stream = &value[2..];
ensure_radixed_value(stream, raw, radix, error);
decode_float_or_integer(stream, raw, kind, output, error)
}
b'b' | b'B' => {
if signed {
error.report_error(
ParseError::new("integers with a radix cannot be signed")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(0, 1)),
);
}
if radix == b'B' {
let start = value.offset_from(&raw.as_str());
let end = start + 2;
error.report_error(
ParseError::new("radix must be lowercase")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal("0b")])
.with_unexpected(Span::new_unchecked(start, end)),
);
}
let radix = IntegerRadix::Bin;
let kind = ScalarKind::Integer(radix);
let stream = &value[2..];
ensure_radixed_value(stream, raw, radix, error);
decode_float_or_integer(stream, raw, kind, output, error)
}
b'd' | b'D' => {
if signed {
error.report_error(
ParseError::new("integers with a radix cannot be signed")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(0, 1)),
);
}
let radix = IntegerRadix::Dec;
let kind = ScalarKind::Integer(radix);
let stream = &value[2..];
error.report_error(
ParseError::new("redundant integer number prefix")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(0, 2)),
);
ensure_radixed_value(stream, raw, radix, error);
decode_float_or_integer(stream, raw, kind, output, error)
}
_ => decode_datetime_or_float_or_integer(value, raw, output, error),
}
}
}
pub(crate) fn decode_datetime_or_float_or_integer<'i>(
value: &'i str,
raw: Raw<'i>,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
let Some(digit_end) = value
.as_bytes()
.offset_for(|b| !(b'0'..=b'9').contains_token(b))
else {
let kind = ScalarKind::Integer(IntegerRadix::Dec);
let stream = raw.as_str();
ensure_no_leading_zero(value, raw, error);
return decode_float_or_integer(stream, raw, kind, output, error);
};
#[cfg(feature = "unsafe")] // SAFETY: ascii digits ensures UTF-8 boundary
let rest = unsafe { &value.get_unchecked(digit_end..) };
#[cfg(not(feature = "unsafe"))]
let rest = &value[digit_end..];
if rest.starts_with("-") || rest.starts_with(":") {
decode_as_is(raw, ScalarKind::DateTime, output, error)
} else if rest.contains(" ") {
decode_invalid(raw, output, error)
} else if is_float(rest) {
let kind = ScalarKind::Float;
let stream = raw.as_str();
ensure_float(value, raw, error);
decode_float_or_integer(stream, raw, kind, output, error)
} else if rest.starts_with("_") {
let kind = ScalarKind::Integer(IntegerRadix::Dec);
let stream = raw.as_str();
ensure_no_leading_zero(value, raw, error);
decode_float_or_integer(stream, raw, kind, output, error)
} else {
decode_invalid(raw, output, error)
}
}
/// ```abnf
/// float = float-int-part ( exp / frac [ exp ] )
///
/// float-int-part = dec-int
/// frac = decimal-point zero-prefixable-int
/// decimal-point = %x2E ; .
/// zero-prefixable-int = DIGIT *( DIGIT / underscore DIGIT )
///
/// exp = "e" float-exp-part
/// float-exp-part = [ minus / plus ] zero-prefixable-int
/// ```
pub(crate) fn ensure_float<'i>(mut value: &'i str, raw: Raw<'i>, error: &mut dyn ErrorSink) {
ensure_dec_uint(&mut value, raw, false, "invalid mantissa", error);
if value.starts_with(".") {
let _ = value.next_token();
ensure_dec_uint(&mut value, raw, true, "invalid fraction", error);
}
if value.starts_with(['e', 'E']) {
let _ = value.next_token();
if value.starts_with(['+', '-']) {
let _ = value.next_token();
}
ensure_dec_uint(&mut value, raw, true, "invalid exponent", error);
}
if !value.is_empty() {
let start = value.offset_from(&raw.as_str());
let end = raw.len();
error.report_error(
ParseError::new(ScalarKind::Float.invalid_description())
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(start, end)),
);
}
}
pub(crate) fn ensure_dec_uint<'i>(
value: &mut &'i str,
raw: Raw<'i>,
zero_prefix: bool,
invalid_description: &'static str,
error: &mut dyn ErrorSink,
) {
let start = *value;
let mut digit_count = 0;
while let Some(current) = value.chars().next() {
if current.is_ascii_digit() {
digit_count += 1;
} else if current == '_' {
} else {
break;
}
let _ = value.next_token();
}
match digit_count {
0 => {
let start = start.offset_from(&raw.as_str());
let end = start;
error.report_error(
ParseError::new(invalid_description)
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Description("digits")])
.with_unexpected(Span::new_unchecked(start, end)),
);
}
1 => {}
_ if start.starts_with("0") && !zero_prefix => {
let start = start.offset_from(&raw.as_str());
let end = start + 1;
error.report_error(
ParseError::new("unexpected leading zero")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(start, end)),
);
}
_ => {}
}
}
pub(crate) fn ensure_no_leading_zero<'i>(value: &'i str, raw: Raw<'i>, error: &mut dyn ErrorSink) {
if value.starts_with("0") {
let start = value.offset_from(&raw.as_str());
let end = start + 1;
error.report_error(
ParseError::new("unexpected leading zero")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(start, end)),
);
}
}
pub(crate) fn ensure_radixed_value(
value: &str,
raw: Raw<'_>,
radix: IntegerRadix,
error: &mut dyn ErrorSink,
) {
let invalid = ['+', '-'];
let value = if let Some(value) = value.strip_prefix(invalid) {
let pos = raw.as_str().find(invalid).unwrap();
error.report_error(
ParseError::new("unexpected sign")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(pos, pos + 1)),
);
value
} else {
value
};
let valid = radix.validator();
for (index, c) in value.char_indices() {
if !valid(c) && c != '_' {
let pos = value.offset_from(&raw.as_str()) + index;
error.report_error(
ParseError::new(radix.invalid_description())
.with_context(Span::new_unchecked(0, raw.len()))
.with_unexpected(Span::new_unchecked(pos, pos)),
);
}
}
}
pub(crate) fn decode_float_or_integer<'i>(
stream: &'i str,
raw: Raw<'i>,
kind: ScalarKind,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
output.clear();
let underscore = "_";
if has_underscore(stream) {
if stream.starts_with(underscore) {
error.report_error(
ParseError::new("`_` may only go between digits")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(0, underscore.len())),
);
}
if 1 < stream.len() && stream.ends_with(underscore) {
let start = stream.offset_from(&raw.as_str());
let end = start + stream.len();
error.report_error(
ParseError::new("`_` may only go between digits")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[])
.with_unexpected(Span::new_unchecked(end - underscore.len(), end)),
);
}
for part in stream.split(underscore) {
let part_start = part.offset_from(&raw.as_str());
let part_end = part_start + part.len();
if 0 < part_start {
let first = part.as_bytes().first().copied().unwrap_or(b'0');
if !is_any_digit(first, kind) {
let start = part_start - 1;
let end = part_start;
debug_assert_eq!(&raw.as_str()[start..end], underscore);
error.report_error(
ParseError::new("`_` may only go between digits")
.with_context(Span::new_unchecked(0, raw.len()))
.with_unexpected(Span::new_unchecked(start, end)),
);
}
}
if 1 < part.len() && part_end < raw.len() {
let last = part.as_bytes().last().copied().unwrap_or(b'0');
if !is_any_digit(last, kind) {
let start = part_end;
let end = start + underscore.len();
debug_assert_eq!(&raw.as_str()[start..end], underscore);
error.report_error(
ParseError::new("`_` may only go between digits")
.with_context(Span::new_unchecked(0, raw.len()))
.with_unexpected(Span::new_unchecked(start, end)),
);
}
}
if part.is_empty() && part_start != 0 && part_end != raw.len() {
let start = part_start;
let end = start + 1;
error.report_error(
ParseError::new("`_` may only go between digits")
.with_context(Span::new_unchecked(0, raw.len()))
.with_unexpected(Span::new_unchecked(start, end)),
);
}
if !part.is_empty() && !output.push_str(part) {
error.report_error(
ParseError::new(ALLOCATION_ERROR)
.with_unexpected(Span::new_unchecked(part_start, part_end)),
);
}
}
} else {
if !output.push_str(stream) {
error.report_error(
ParseError::new(ALLOCATION_ERROR)
.with_unexpected(Span::new_unchecked(0, raw.len())),
);
}
}
kind
}
fn is_any_digit(b: u8, kind: ScalarKind) -> bool {
if kind == ScalarKind::Float {
is_dec_integer_digit(b)
} else {
is_any_integer_digit(b)
}
}
fn is_any_integer_digit(b: u8) -> bool {
(b'0'..=b'9', b'a'..=b'f', b'A'..=b'F').contains_token(b)
}
fn is_dec_integer_digit(b: u8) -> bool {
(b'0'..=b'9').contains_token(b)
}
fn has_underscore(raw: &str) -> bool {
raw.as_bytes().find_slice(b'_').is_some()
}
fn is_float(raw: &str) -> bool {
raw.as_bytes().find_slice((b'.', b'e', b'E')).is_some()
}
pub(crate) fn decode_as_is<'i>(
raw: Raw<'i>,
kind: ScalarKind,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
let kind = decode_as(raw, raw.as_str(), kind, output, error);
kind
}
pub(crate) fn decode_as<'i>(
raw: Raw<'i>,
symbol: &'i str,
kind: ScalarKind,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
output.clear();
if !output.push_str(symbol) {
error.report_error(
ParseError::new(ALLOCATION_ERROR).with_unexpected(Span::new_unchecked(0, raw.len())),
);
}
kind
}
pub(crate) fn decode_symbol<'i>(
raw: Raw<'i>,
symbol: &'static str,
kind: ScalarKind,
expected: &'static [Expected],
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
if raw.as_str() != symbol {
if raw.as_str().contains(" ") {
return decode_invalid(raw, output, error);
} else {
error.report_error(
ParseError::new(kind.invalid_description())
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(expected)
.with_unexpected(Span::new_unchecked(0, raw.len())),
);
}
}
decode_as(raw, symbol, kind, output, error)
}
pub(crate) fn decode_invalid<'i>(
raw: Raw<'i>,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> ScalarKind {
if raw.as_str().ends_with("'''") {
error.report_error(
ParseError::new("missing opening quote")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal(r#"'''"#)])
.with_unexpected(Span::new_unchecked(0, 0)),
);
} else if raw.as_str().ends_with(r#"""""#) {
error.report_error(
ParseError::new("missing opening quote")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Description("multi-line basic string")])
.with_expected(&[Expected::Literal(r#"""""#)])
.with_unexpected(Span::new_unchecked(0, 0)),
);
} else if raw.as_str().ends_with("'") {
error.report_error(
ParseError::new("missing opening quote")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal(r#"'"#)])
.with_unexpected(Span::new_unchecked(0, 0)),
);
} else if raw.as_str().ends_with(r#"""#) {
error.report_error(
ParseError::new("missing opening quote")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal(r#"""#)])
.with_unexpected(Span::new_unchecked(0, 0)),
);
} else {
error.report_error(
ParseError::new("string values must be quoted")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Description("literal string")])
.with_unexpected(Span::new_unchecked(0, raw.len())),
);
}
output.clear();
if !output.push_str(raw.as_str()) {
error.report_error(
ParseError::new(ALLOCATION_ERROR).with_unexpected(Span::new_unchecked(0, raw.len())),
);
}
ScalarKind::String
}

1265
vendor/toml_parser/src/decoder/string.rs vendored Normal file
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76
vendor/toml_parser/src/decoder/ws.rs vendored Normal file
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use core::ops::RangeInclusive;
use winnow::stream::ContainsToken as _;
use crate::lexer::COMMENT_START_SYMBOL;
use crate::ErrorSink;
use crate::Expected;
use crate::ParseError;
use crate::Raw;
use crate::Span;
/// Parse comment
///
/// ```bnf
/// ;; Comment
///
/// comment-start-symbol = %x23 ; #
/// non-ascii = %x80-D7FF / %xE000-10FFFF
/// non-eol = %x09 / %x20-7F / non-ascii
///
/// comment = comment-start-symbol *non-eol
/// ```
pub(crate) fn decode_comment(raw: Raw<'_>, error: &mut dyn ErrorSink) {
let s = raw.as_bytes();
if s.first() != Some(&COMMENT_START_SYMBOL) {
error.report_error(
ParseError::new("missing comment start")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal("#")])
.with_unexpected(Span::new_unchecked(0, 0)),
);
}
for (i, b) in s.iter().copied().enumerate() {
if !NON_EOL.contains_token(b) {
error.report_error(
ParseError::new("invalid comment character")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Description("printable characters")])
.with_unexpected(Span::new_unchecked(i, i)),
);
}
}
}
// non-ascii = %x80-D7FF / %xE000-10FFFF
// - ASCII is 0xxxxxxx
// - First byte for UTF-8 is 11xxxxxx
// - Subsequent UTF-8 bytes are 10xxxxxx
pub(crate) const NON_ASCII: RangeInclusive<u8> = 0x80..=0xff;
// non-eol = %x09 / %x20-7E / non-ascii
pub(crate) const NON_EOL: (u8, RangeInclusive<u8>, RangeInclusive<u8>) =
(0x09, 0x20..=0x7E, NON_ASCII);
/// Parse newline
///
/// ```bnf
///;; Newline
///
/// newline = %x0A ; LF
/// newline =/ %x0D.0A ; CRLF
/// ```
pub(crate) fn decode_newline(raw: Raw<'_>, error: &mut dyn ErrorSink) {
let s = raw.as_str();
if s == "\r" {
error.report_error(
ParseError::new("carriage return must be followed by newline")
.with_context(Span::new_unchecked(0, raw.len()))
.with_expected(&[Expected::Literal("\n")])
.with_unexpected(Span::new_unchecked(raw.len(), raw.len())),
);
}
}

102
vendor/toml_parser/src/error.rs vendored Normal file
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use crate::Span;
pub trait ErrorSink {
fn report_error(&mut self, error: ParseError);
}
impl<F> ErrorSink for F
where
F: FnMut(ParseError),
{
fn report_error(&mut self, error: ParseError) {
(self)(error);
}
}
impl ErrorSink for () {
fn report_error(&mut self, _error: ParseError) {}
}
impl ErrorSink for Option<ParseError> {
fn report_error(&mut self, error: ParseError) {
self.get_or_insert(error);
}
}
#[cfg(feature = "alloc")]
#[allow(unused_qualifications)]
impl ErrorSink for alloc::vec::Vec<ParseError> {
fn report_error(&mut self, error: ParseError) {
self.push(error);
}
}
#[derive(Clone, PartialEq, Eq, Debug)]
#[non_exhaustive]
pub struct ParseError {
context: Option<Span>,
description: ErrorStr,
expected: Option<&'static [Expected]>,
unexpected: Option<Span>,
}
impl ParseError {
pub fn new(description: impl Into<ErrorStr>) -> Self {
Self {
context: None,
description: description.into(),
expected: None,
unexpected: None,
}
}
pub fn with_context(mut self, context: Span) -> Self {
self.context = Some(context);
self
}
pub fn with_expected(mut self, expected: &'static [Expected]) -> Self {
self.expected = Some(expected);
self
}
pub fn with_unexpected(mut self, unexpected: Span) -> Self {
self.unexpected = Some(unexpected);
self
}
pub fn context(&self) -> Option<Span> {
self.context
}
pub fn description(&self) -> &str {
&self.description
}
pub fn expected(&self) -> Option<&'static [Expected]> {
self.expected
}
pub fn unexpected(&self) -> Option<Span> {
self.unexpected
}
pub(crate) fn rebase_spans(mut self, offset: usize) -> Self {
if let Some(context) = self.context.as_mut() {
*context += offset;
}
if let Some(unexpected) = self.unexpected.as_mut() {
*unexpected += offset;
}
self
}
}
#[cfg(feature = "alloc")]
type ErrorStr = alloc::borrow::Cow<'static, str>;
#[cfg(not(feature = "alloc"))]
type ErrorStr = &'static str;
#[derive(Copy, Clone, PartialEq, Eq, Debug)]
#[non_exhaustive]
pub enum Expected {
Literal(&'static str),
Description(&'static str),
}

627
vendor/toml_parser/src/lexer/mod.rs vendored Normal file
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//! Lex TOML tokens
//!
//! To get started, see [`Source::lex`][crate::Source::lex]
#[cfg(test)]
#[cfg(feature = "std")]
mod test;
mod token;
#[cfg(feature = "alloc")]
use alloc::vec::Vec;
use winnow::stream::AsBStr as _;
use winnow::stream::ContainsToken as _;
use winnow::stream::FindSlice as _;
use winnow::stream::Location;
use winnow::stream::Stream as _;
use crate::Span;
pub use token::Token;
pub use token::TokenKind;
/// Lex TOML [tokens][Token]
///
/// To get started, see [`Source::lex`][crate::Source::lex]
pub struct Lexer<'i> {
stream: Stream<'i>,
eof: bool,
}
impl<'i> Lexer<'i> {
pub(crate) fn new(input: &'i str) -> Self {
let mut stream = Stream::new(input);
if input.as_bytes().starts_with(BOM) {
let offset = BOM.len();
#[cfg(feature = "unsafe")] // SAFETY: only called when next character is ASCII
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
}
Lexer { stream, eof: false }
}
#[cfg(feature = "alloc")]
pub fn into_vec(self) -> Vec<Token> {
#![allow(unused_qualifications)] // due to MSRV of 1.66
let capacity = core::cmp::min(
self.stream.len(),
usize::MAX / core::mem::size_of::<Token>(),
);
let mut vec = Vec::with_capacity(capacity);
vec.extend(self);
vec
}
}
impl Iterator for Lexer<'_> {
type Item = Token;
fn next(&mut self) -> Option<Self::Item> {
let Some(peek_byte) = self.stream.as_bstr().first() else {
if self.eof {
return None;
} else {
self.eof = true;
let start = self.stream.current_token_start();
let span = Span::new_unchecked(start, start);
return Some(Token::new(TokenKind::Eof, span));
}
};
Some(process_token(*peek_byte, &mut self.stream))
}
}
const BOM: &[u8] = b"\xEF\xBB\xBF";
pub(crate) type Stream<'i> = winnow::stream::LocatingSlice<&'i str>;
fn process_token(peek_byte: u8, stream: &mut Stream<'_>) -> Token {
let token = match peek_byte {
b'.' => lex_ascii_char(stream, TokenKind::Dot),
b'=' => lex_ascii_char(stream, TokenKind::Equals),
b',' => lex_ascii_char(stream, TokenKind::Comma),
b'[' => lex_ascii_char(stream, TokenKind::LeftSquareBracket),
b']' => lex_ascii_char(stream, TokenKind::RightSquareBracket),
b'{' => lex_ascii_char(stream, TokenKind::LeftCurlyBracket),
b'}' => lex_ascii_char(stream, TokenKind::RightCurlyBracket),
b' ' => lex_whitespace(stream),
b'\t' => lex_whitespace(stream),
b'#' => lex_comment(stream),
b'\r' => lex_crlf(stream),
b'\n' => lex_ascii_char(stream, TokenKind::Newline),
b'\'' => {
if stream.starts_with(ML_LITERAL_STRING_DELIM) {
lex_ml_literal_string(stream)
} else {
lex_literal_string(stream)
}
}
b'"' => {
if stream.starts_with(ML_BASIC_STRING_DELIM) {
lex_ml_basic_string(stream)
} else {
lex_basic_string(stream)
}
}
_ => lex_atom(stream),
};
token
}
/// Process an ASCII character token
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream` must be non-empty
/// - `stream[0]` must be ASCII
fn lex_ascii_char(stream: &mut Stream<'_>, kind: TokenKind) -> Token {
debug_assert!(!stream.is_empty());
let start = stream.current_token_start();
let offset = 1; // an ascii character
#[cfg(feature = "unsafe")] // SAFETY: only called when next character is ASCII
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(kind, span)
}
/// Process Whitespace
///
/// ```bnf
/// ;; Whitespace
///
/// ws = *wschar
/// wschar = %x20 ; Space
/// wschar =/ %x09 ; Horizontal tab
/// ```
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream` must be non-empty
fn lex_whitespace(stream: &mut Stream<'_>) -> Token {
debug_assert!(!stream.is_empty());
let start = stream.current_token_start();
let offset = stream
.as_bstr()
.offset_for(|b| !WSCHAR.contains_token(b))
.unwrap_or(stream.eof_offset());
#[cfg(feature = "unsafe")] // SAFETY: WSCHAR ensures `offset` will be at UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::Whitespace, span)
}
/// ```bnf
/// wschar = %x20 ; Space
/// wschar =/ %x09 ; Horizontal tab
/// ```
pub(crate) const WSCHAR: (u8, u8) = (b' ', b'\t');
/// Process Comment
///
/// ```bnf
/// ;; Comment
///
/// comment-start-symbol = %x23 ; #
/// non-ascii = %x80-D7FF / %xE000-10FFFF
/// non-eol = %x09 / %x20-7F / non-ascii
///
/// comment = comment-start-symbol *non-eol
/// ```
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream[0] == b'#'`
fn lex_comment(stream: &mut Stream<'_>) -> Token {
let start = stream.current_token_start();
let offset = stream
.as_bytes()
.find_slice((b'\r', b'\n'))
.map(|s| s.start)
.unwrap_or_else(|| stream.eof_offset());
#[cfg(feature = "unsafe")] // SAFETY: newlines ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::Comment, span)
}
/// `comment-start-symbol = %x23 ; #`
pub(crate) const COMMENT_START_SYMBOL: u8 = b'#';
/// Process Newline
///
/// ```bnf
/// ;; Newline
///
/// newline = %x0A ; LF
/// newline =/ %x0D.0A ; CRLF
/// ```
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream[0] == b'\r'`
fn lex_crlf(stream: &mut Stream<'_>) -> Token {
let start = stream.current_token_start();
let mut offset = '\r'.len_utf8();
let has_lf = stream.as_bstr().get(1) == Some(&b'\n');
if has_lf {
offset += '\n'.len_utf8();
}
#[cfg(feature = "unsafe")] // SAFETY: newlines ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::Newline, span)
}
/// Process literal string
///
/// ```bnf
/// ;; Literal String
///
/// literal-string = apostrophe *literal-char apostrophe
///
/// apostrophe = %x27 ; ' apostrophe
///
/// literal-char = %x09 / %x20-26 / %x28-7E / non-ascii
/// ```
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream[0] == b'\''`
fn lex_literal_string(stream: &mut Stream<'_>) -> Token {
let start = stream.current_token_start();
let offset = 1; // APOSTROPHE
#[cfg(feature = "unsafe")] // SAFETY: only called when next character is ASCII
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let offset = match stream.as_bstr().find_slice((APOSTROPHE, b'\n')) {
Some(span) => {
if stream.as_bstr()[span.start] == APOSTROPHE {
span.end
} else {
span.start
}
}
None => stream.eof_offset(),
};
#[cfg(feature = "unsafe")]
// SAFETY: `APOSTROPHE`/newline ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::LiteralString, span)
}
/// `apostrophe = %x27 ; ' apostrophe`
pub(crate) const APOSTROPHE: u8 = b'\'';
/// Process multi-line literal string
///
/// ```bnf
/// ;; Multiline Literal String
///
/// ml-literal-string = ml-literal-string-delim [ newline ] ml-literal-body
/// ml-literal-string-delim
/// ml-literal-string-delim = 3apostrophe
/// ml-literal-body = *mll-content *( mll-quotes 1*mll-content ) [ mll-quotes ]
///
/// mll-content = mll-char / newline
/// mll-char = %x09 / %x20-26 / %x28-7E / non-ascii
/// mll-quotes = 1*2apostrophe
/// ```
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream.starts_with(ML_LITERAL_STRING_DELIM)`
fn lex_ml_literal_string(stream: &mut Stream<'_>) -> Token {
let start = stream.current_token_start();
let offset = ML_LITERAL_STRING_DELIM.len();
#[cfg(feature = "unsafe")] // SAFETY: only called when next character is ASCII
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let offset = match stream.as_bstr().find_slice(ML_LITERAL_STRING_DELIM) {
Some(span) => span.end,
None => stream.eof_offset(),
};
#[cfg(feature = "unsafe")]
// SAFETY: `ML_LITERAL_STRING_DELIM` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
if stream.as_bstr().peek_token() == Some(APOSTROPHE) {
let offset = 1;
#[cfg(feature = "unsafe")] // SAFETY: `APOSTROPHE` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
if stream.as_bstr().peek_token() == Some(APOSTROPHE) {
let offset = 1;
#[cfg(feature = "unsafe")]
// SAFETY: `APOSTROPHE` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
}
}
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::MlLiteralString, span)
}
/// `ml-literal-string-delim = 3apostrophe`
pub(crate) const ML_LITERAL_STRING_DELIM: &str = "'''";
/// Process basic string
///
/// ```bnf
/// ;; Basic String
///
/// basic-string = quotation-mark *basic-char quotation-mark
///
/// quotation-mark = %x22 ; "
///
/// basic-char = basic-unescaped / escaped
/// basic-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
/// escaped = escape escape-seq-char
///
/// escape = %x5C ; \
/// escape-seq-char = %x22 ; " quotation mark U+0022
/// escape-seq-char =/ %x5C ; \ reverse solidus U+005C
/// escape-seq-char =/ %x62 ; b backspace U+0008
/// escape-seq-char =/ %x66 ; f form feed U+000C
/// escape-seq-char =/ %x6E ; n line feed U+000A
/// escape-seq-char =/ %x72 ; r carriage return U+000D
/// escape-seq-char =/ %x74 ; t tab U+0009
/// escape-seq-char =/ %x75 4HEXDIG ; uXXXX U+XXXX
/// escape-seq-char =/ %x55 8HEXDIG ; UXXXXXXXX U+XXXXXXXX
/// ```
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream[0] == b'"'`
fn lex_basic_string(stream: &mut Stream<'_>) -> Token {
let start = stream.current_token_start();
let offset = 1; // QUOTATION_MARK
#[cfg(feature = "unsafe")] // SAFETY: only called when next character is ASCII
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
loop {
// newline is present for error recovery
match stream.as_bstr().find_slice((QUOTATION_MARK, ESCAPE, b'\n')) {
Some(span) => {
let found = stream.as_bstr()[span.start];
if found == QUOTATION_MARK {
let offset = span.end;
#[cfg(feature = "unsafe")]
// SAFETY: `QUOTATION_MARK` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
break;
} else if found == ESCAPE {
let offset = span.end;
#[cfg(feature = "unsafe")]
// SAFETY: `ESCAPE` / newline ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let peek = stream.as_bstr().peek_token();
match peek {
Some(ESCAPE) | Some(QUOTATION_MARK) => {
let offset = 1; // ESCAPE / QUOTATION_MARK
#[cfg(feature = "unsafe")]
#[cfg(feature = "unsafe")]
// SAFETY: `ESCAPE` / newline ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
}
_ => {}
}
continue;
} else if found == b'\n' {
let offset = span.start;
#[cfg(feature = "unsafe")]
// SAFETY: newline ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
break;
} else {
unreachable!("found `{found}`");
}
}
None => {
stream.finish();
break;
}
}
}
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::BasicString, span)
}
/// `quotation-mark = %x22 ; "`
pub(crate) const QUOTATION_MARK: u8 = b'"';
/// `escape = %x5C ; \`
pub(crate) const ESCAPE: u8 = b'\\';
/// Process multi-line basic string
///
/// ```bnf
/// ;; Multiline Basic String
///
/// ml-basic-string = ml-basic-string-delim [ newline ] ml-basic-body
/// ml-basic-string-delim
/// ml-basic-string-delim = 3quotation-mark
/// ml-basic-body = *mlb-content *( mlb-quotes 1*mlb-content ) [ mlb-quotes ]
///
/// mlb-content = mlb-char / newline / mlb-escaped-nl
/// mlb-char = mlb-unescaped / escaped
/// mlb-quotes = 1*2quotation-mark
/// mlb-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
/// mlb-escaped-nl = escape ws newline *( wschar / newline )
/// ```
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream.starts_with(ML_BASIC_STRING_DELIM)`
fn lex_ml_basic_string(stream: &mut Stream<'_>) -> Token {
let start = stream.current_token_start();
let offset = ML_BASIC_STRING_DELIM.len();
#[cfg(feature = "unsafe")] // SAFETY: only called when next character is ASCII
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
loop {
// newline is present for error recovery
match stream.as_bstr().find_slice((ML_BASIC_STRING_DELIM, "\\")) {
Some(span) => {
let found = stream.as_bstr()[span.start];
if found == QUOTATION_MARK {
let offset = span.end;
#[cfg(feature = "unsafe")]
// SAFETY: `QUOTATION_MARK` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
break;
} else if found == ESCAPE {
let offset = span.end;
#[cfg(feature = "unsafe")]
// SAFETY: `ESCAPE` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let peek = stream.as_bstr().peek_token();
match peek {
Some(ESCAPE) | Some(QUOTATION_MARK) => {
let offset = 1; // ESCAPE / QUOTATION_MARK
#[cfg(feature = "unsafe")]
// SAFETY: `QUOTATION_MARK`/`ESCAPE` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
}
_ => {}
}
continue;
} else {
unreachable!("found `{found}`");
}
}
None => {
stream.finish();
break;
}
}
}
if stream.as_bstr().peek_token() == Some(QUOTATION_MARK) {
let offset = 1;
#[cfg(feature = "unsafe")]
// SAFETY: `QUOTATION_MARK` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
if stream.as_bstr().peek_token() == Some(QUOTATION_MARK) {
let offset = 1;
#[cfg(feature = "unsafe")]
// SAFETY: `QUOTATION_MARK` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
}
}
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::MlBasicString, span)
}
/// `ml-basic-string-delim = 3quotation-mark`
pub(crate) const ML_BASIC_STRING_DELIM: &str = "\"\"\"";
/// Process Atom
///
/// This is everything else
///
/// # Safety
///
/// - `stream` must be UTF-8
/// - `stream` must be non-empty
fn lex_atom(stream: &mut Stream<'_>) -> Token {
let start = stream.current_token_start();
// Intentionally leaves off quotes in case the opening quote was missing
const TOKEN_START: &[u8] = b".=,[]{} \t#\r\n";
let offset = stream
.as_bstr()
.offset_for(|b| TOKEN_START.contains_token(b))
.unwrap_or_else(|| stream.eof_offset());
#[cfg(feature = "unsafe")] // SAFETY: `TOKEN_START` ensure `offset` is along UTF-8 boundary
unsafe {
stream.next_slice_unchecked(offset)
};
#[cfg(not(feature = "unsafe"))]
stream.next_slice(offset);
let end = stream.previous_token_end();
let span = Span::new_unchecked(start, end);
Token::new(TokenKind::Atom, span)
}

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vendor/toml_parser/src/lexer/test.rs vendored Normal file
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//! Lexed TOML tokens
use super::Span;
use super::APOSTROPHE;
use super::COMMENT_START_SYMBOL;
use super::QUOTATION_MARK;
use super::WSCHAR;
use crate::decoder::Encoding;
/// An unvalidated TOML Token
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct Token {
pub(super) kind: TokenKind,
pub(super) span: Span,
}
impl Token {
pub(super) fn new(kind: TokenKind, span: Span) -> Self {
Self { kind, span }
}
#[inline(always)]
pub fn kind(&self) -> TokenKind {
self.kind
}
#[inline(always)]
pub fn span(&self) -> Span {
self.span
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
#[repr(u8)]
pub enum TokenKind {
/// Either for dotted-key or float
Dot = b'.',
/// Key-value separator
Equals = b'=',
/// Value separator
Comma = b',',
/// Either array or standard-table start
LeftSquareBracket = b'[',
/// Either array or standard-table end
RightSquareBracket = b']',
/// Inline table start
LeftCurlyBracket = b'{',
/// Inline table end
RightCurlyBracket = b'}',
Whitespace = WSCHAR.0,
Comment = COMMENT_START_SYMBOL,
Newline = b'\n',
LiteralString = APOSTROPHE,
BasicString = QUOTATION_MARK,
MlLiteralString = 1,
MlBasicString,
/// Anything else
Atom,
Eof,
}
impl TokenKind {
pub const fn description(&self) -> &'static str {
match self {
Self::Dot => "`.`",
Self::Equals => "`=`",
Self::Comma => "`,`",
Self::LeftSquareBracket => "`[`",
Self::RightSquareBracket => "`]`",
Self::LeftCurlyBracket => "`{`",
Self::RightCurlyBracket => "`}`",
Self::Whitespace => "whitespace",
Self::Comment => "comment",
Self::Newline => "newline",
Self::LiteralString => "literal string",
Self::BasicString => "basic string",
Self::MlLiteralString => "multi-line literal string",
Self::MlBasicString => "multi-line basic string",
Self::Atom => "token",
Self::Eof => "end-of-input",
}
}
pub fn encoding(&self) -> Option<Encoding> {
match self {
Self::LiteralString => Some(Encoding::LiteralString),
Self::BasicString => Some(Encoding::BasicString),
Self::MlLiteralString => Some(Encoding::MlLiteralString),
Self::MlBasicString => Some(Encoding::MlBasicString),
Self::Atom
| Self::LeftSquareBracket
| Self::RightSquareBracket
| Self::Dot
| Self::Equals
| Self::Comma
| Self::RightCurlyBracket
| Self::LeftCurlyBracket
| Self::Whitespace
| Self::Newline
| Self::Comment
| Self::Eof => None,
}
}
}

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//! TOML lexer and parser
//!
//! Characteristics:
//! - Error recovery
//! - Lazy validation
//! - `forbid(unsafe)` by default, requiring the `unsafe` feature otherwise
//! - `no_std` support, including putting users in charge of allocation choices (including not
//! allocating)
//!
//! Full parsing is broken into three phases:
//! 1. [Lexing tokens][lexer]
//! 2. [Parsing tokens][parser] (push parser)
//! 3. Organizing the physical layout into the logical layout,
//! including [decoding keys and values][decoder]
#![cfg_attr(all(not(feature = "std"), not(test)), no_std)]
#![cfg_attr(docsrs, feature(doc_auto_cfg))]
#![cfg_attr(not(feature = "unsafe"), forbid(unsafe_code))]
#![warn(clippy::std_instead_of_core)]
#![warn(clippy::std_instead_of_alloc)]
#![warn(clippy::print_stderr)]
#![warn(clippy::print_stdout)]
#[cfg(feature = "alloc")]
extern crate alloc;
#[macro_use]
mod macros;
#[cfg(feature = "debug")]
pub(crate) mod debug;
mod error;
mod source;
pub mod decoder;
pub mod lexer;
pub mod parser;
pub use error::ErrorSink;
pub use error::Expected;
pub use error::ParseError;
pub use source::Raw;
pub use source::Source;
pub use source::SourceIndex;
pub use source::Span;
#[doc = include_str!("../README.md")]
#[cfg(doctest)]
pub struct ReadmeDoctests;

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543
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use crate::decoder::Encoding;
use crate::ErrorSink;
use crate::ParseError;
use crate::Source;
use crate::Span;
pub trait EventReceiver {
fn std_table_open(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn std_table_close(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn array_table_open(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn array_table_close(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
/// Returns if entering the inline table is allowed
#[must_use]
fn inline_table_open(&mut self, _span: Span, _error: &mut dyn ErrorSink) -> bool {
true
}
fn inline_table_close(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
/// Returns if entering the array is allowed
#[must_use]
fn array_open(&mut self, _span: Span, _error: &mut dyn ErrorSink) -> bool {
true
}
fn array_close(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn simple_key(&mut self, _span: Span, _kind: Option<Encoding>, _error: &mut dyn ErrorSink) {}
fn key_sep(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn key_val_sep(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn scalar(&mut self, _span: Span, _kind: Option<Encoding>, _error: &mut dyn ErrorSink) {}
fn value_sep(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn whitespace(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn comment(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn newline(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
fn error(&mut self, _span: Span, _error: &mut dyn ErrorSink) {}
}
impl<F> EventReceiver for F
where
F: FnMut(Event),
{
fn std_table_open(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::StdTableOpen,
encoding: None,
span,
});
}
fn std_table_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::StdTableClose,
encoding: None,
span,
});
}
fn array_table_open(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::ArrayTableOpen,
encoding: None,
span,
});
}
fn array_table_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::ArrayTableClose,
encoding: None,
span,
});
}
fn inline_table_open(&mut self, span: Span, _error: &mut dyn ErrorSink) -> bool {
(self)(Event {
kind: EventKind::InlineTableOpen,
encoding: None,
span,
});
true
}
fn inline_table_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::InlineTableClose,
encoding: None,
span,
});
}
fn array_open(&mut self, span: Span, _error: &mut dyn ErrorSink) -> bool {
(self)(Event {
kind: EventKind::ArrayOpen,
encoding: None,
span,
});
true
}
fn array_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::ArrayClose,
encoding: None,
span,
});
}
fn simple_key(&mut self, span: Span, encoding: Option<Encoding>, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::SimpleKey,
encoding,
span,
});
}
fn key_sep(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::KeySep,
encoding: None,
span,
});
}
fn key_val_sep(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::KeyValSep,
encoding: None,
span,
});
}
fn scalar(&mut self, span: Span, encoding: Option<Encoding>, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::Scalar,
encoding,
span,
});
}
fn value_sep(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::ValueSep,
encoding: None,
span,
});
}
fn whitespace(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::Whitespace,
encoding: None,
span,
});
}
fn comment(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::Comment,
encoding: None,
span,
});
}
fn newline(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::Newline,
encoding: None,
span,
});
}
fn error(&mut self, span: Span, _error: &mut dyn ErrorSink) {
(self)(Event {
kind: EventKind::Error,
encoding: None,
span,
});
}
}
#[cfg(feature = "alloc")]
#[allow(unused_qualifications)]
impl EventReceiver for alloc::vec::Vec<Event> {
fn std_table_open(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::StdTableOpen,
encoding: None,
span,
});
}
fn std_table_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::StdTableClose,
encoding: None,
span,
});
}
fn array_table_open(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::ArrayTableOpen,
encoding: None,
span,
});
}
fn array_table_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::ArrayTableClose,
encoding: None,
span,
});
}
fn inline_table_open(&mut self, span: Span, _error: &mut dyn ErrorSink) -> bool {
self.push(Event {
kind: EventKind::InlineTableOpen,
encoding: None,
span,
});
true
}
fn inline_table_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::InlineTableClose,
encoding: None,
span,
});
}
fn array_open(&mut self, span: Span, _error: &mut dyn ErrorSink) -> bool {
self.push(Event {
kind: EventKind::ArrayOpen,
encoding: None,
span,
});
true
}
fn array_close(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::ArrayClose,
encoding: None,
span,
});
}
fn simple_key(&mut self, span: Span, encoding: Option<Encoding>, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::SimpleKey,
encoding,
span,
});
}
fn key_sep(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::KeySep,
encoding: None,
span,
});
}
fn key_val_sep(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::KeyValSep,
encoding: None,
span,
});
}
fn scalar(&mut self, span: Span, encoding: Option<Encoding>, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::Scalar,
encoding,
span,
});
}
fn value_sep(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::ValueSep,
encoding: None,
span,
});
}
fn whitespace(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::Whitespace,
encoding: None,
span,
});
}
fn comment(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::Comment,
encoding: None,
span,
});
}
fn newline(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::Newline,
encoding: None,
span,
});
}
fn error(&mut self, span: Span, _error: &mut dyn ErrorSink) {
self.push(Event {
kind: EventKind::Error,
encoding: None,
span,
});
}
}
impl EventReceiver for () {}
/// Centralize validation for all whitespace-like content
pub struct ValidateWhitespace<'r, 's> {
receiver: &'r mut dyn EventReceiver,
source: Source<'s>,
}
impl<'r, 's> ValidateWhitespace<'r, 's> {
pub fn new(receiver: &'r mut dyn EventReceiver, source: Source<'s>) -> Self {
Self { receiver, source }
}
}
impl EventReceiver for ValidateWhitespace<'_, '_> {
fn std_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.std_table_open(span, error);
}
fn std_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.std_table_close(span, error);
}
fn array_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_table_open(span, error);
}
fn array_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_table_close(span, error);
}
fn inline_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) -> bool {
self.receiver.inline_table_open(span, error)
}
fn inline_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.inline_table_close(span, error);
}
fn array_open(&mut self, span: Span, error: &mut dyn ErrorSink) -> bool {
self.receiver.array_open(span, error)
}
fn array_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_close(span, error);
}
fn simple_key(&mut self, span: Span, encoding: Option<Encoding>, error: &mut dyn ErrorSink) {
self.receiver.simple_key(span, encoding, error);
}
fn key_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.key_sep(span, error);
}
fn key_val_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.key_val_sep(span, error);
}
fn scalar(&mut self, span: Span, encoding: Option<Encoding>, error: &mut dyn ErrorSink) {
self.receiver.scalar(span, encoding, error);
}
fn value_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.value_sep(span, error);
}
fn whitespace(&mut self, span: Span, error: &mut dyn ErrorSink) {
#[cfg(feature = "unsafe")] // SAFETY: callers must use valid span
let raw = unsafe { self.source.get_unchecked(span) };
#[cfg(not(feature = "unsafe"))]
let raw = self.source.get(span).expect("token spans are valid");
raw.decode_whitespace(error);
self.receiver.whitespace(span, error);
}
fn comment(&mut self, span: Span, error: &mut dyn ErrorSink) {
#[cfg(feature = "unsafe")] // SAFETY: callers must use valid span
let raw = unsafe { self.source.get_unchecked(span) };
#[cfg(not(feature = "unsafe"))]
let raw = self.source.get(span).expect("token spans are valid");
raw.decode_comment(error);
self.receiver.comment(span, error);
}
fn newline(&mut self, span: Span, error: &mut dyn ErrorSink) {
#[cfg(feature = "unsafe")] // SAFETY: callers must use valid span
let raw = unsafe { self.source.get_unchecked(span) };
#[cfg(not(feature = "unsafe"))]
let raw = self.source.get(span).expect("token spans are valid");
raw.decode_newline(error);
self.receiver.newline(span, error);
}
fn error(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.error(span, error);
}
}
pub struct RecursionGuard<'r> {
receiver: &'r mut dyn EventReceiver,
max_depth: u32,
depth: i64,
}
impl<'r> RecursionGuard<'r> {
pub fn new(receiver: &'r mut dyn EventReceiver, max_depth: u32) -> Self {
Self {
receiver,
max_depth,
depth: 0,
}
}
fn within_depth(&self) -> bool {
self.depth <= self.max_depth as i64
}
}
impl EventReceiver for RecursionGuard<'_> {
fn std_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.std_table_open(span, error);
}
fn std_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.std_table_close(span, error);
}
fn array_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_table_open(span, error);
}
fn array_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.array_table_close(span, error);
}
fn inline_table_open(&mut self, span: Span, error: &mut dyn ErrorSink) -> bool {
let allowed = self.receiver.inline_table_open(span, error);
self.depth += 1;
let within_depth = self.within_depth();
if allowed && !within_depth {
error.report_error(
ParseError::new("cannot recurse further; max recursion depth met")
.with_unexpected(span),
);
}
allowed && within_depth
}
fn inline_table_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.depth -= 1;
self.receiver.inline_table_close(span, error);
}
fn array_open(&mut self, span: Span, error: &mut dyn ErrorSink) -> bool {
let allowed = self.receiver.array_open(span, error);
self.depth += 1;
let within_depth = self.within_depth();
if allowed && !within_depth {
error.report_error(
ParseError::new("cannot recurse further; max recursion depth met")
.with_unexpected(span),
);
}
allowed && within_depth
}
fn array_close(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.depth -= 1;
self.receiver.array_close(span, error);
}
fn simple_key(&mut self, span: Span, encoding: Option<Encoding>, error: &mut dyn ErrorSink) {
self.receiver.simple_key(span, encoding, error);
}
fn key_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.key_sep(span, error);
}
fn key_val_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.key_val_sep(span, error);
}
fn scalar(&mut self, span: Span, encoding: Option<Encoding>, error: &mut dyn ErrorSink) {
self.receiver.scalar(span, encoding, error);
}
fn value_sep(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.value_sep(span, error);
}
fn whitespace(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.whitespace(span, error);
}
fn comment(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.comment(span, error);
}
fn newline(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.newline(span, error);
}
fn error(&mut self, span: Span, error: &mut dyn ErrorSink) {
self.receiver.error(span, error);
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub struct Event {
kind: EventKind,
encoding: Option<Encoding>,
span: Span,
}
impl Event {
pub fn new_unchecked(kind: EventKind, encoding: Option<Encoding>, span: Span) -> Self {
Self {
kind,
encoding,
span,
}
}
#[inline(always)]
pub fn kind(&self) -> EventKind {
self.kind
}
#[inline(always)]
pub fn encoding(&self) -> Option<Encoding> {
self.encoding
}
#[inline(always)]
pub fn span(&self) -> Span {
self.span
}
}
#[derive(Copy, Clone, PartialEq, Eq, PartialOrd, Ord, Hash, Debug)]
pub enum EventKind {
StdTableOpen,
StdTableClose,
ArrayTableOpen,
ArrayTableClose,
InlineTableOpen,
InlineTableClose,
ArrayOpen,
ArrayClose,
SimpleKey,
KeySep,
KeyValSep,
Scalar,
ValueSep,
Whitespace,
Comment,
Newline,
Error,
}
impl EventKind {
pub const fn description(&self) -> &'static str {
match self {
Self::StdTableOpen => "std-table open",
Self::StdTableClose => "std-table close",
Self::ArrayTableOpen => "array-table open",
Self::ArrayTableClose => "array-table close",
Self::InlineTableOpen => "inline-table open",
Self::InlineTableClose => "inline-table close",
Self::ArrayOpen => "array open",
Self::ArrayClose => "array close",
Self::SimpleKey => "key",
Self::KeySep => "key separator",
Self::KeyValSep => "key-value separator",
Self::Scalar => "value",
Self::ValueSep => "value separator",
Self::Whitespace => "whitespace",
Self::Comment => "comment",
Self::Newline => "newline",
Self::Error => "error",
}
}
}

16
vendor/toml_parser/src/parser/mod.rs vendored Normal file
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@@ -0,0 +1,16 @@
//! A TOML push [parser][parse_document]
//!
//! This takes TOML [tokens][crate::lexer::Token] and [emits][EventReceiver] [events][Event].
mod document;
mod event;
pub use document::parse_document;
pub use document::parse_key;
pub use document::parse_simple_key;
pub use document::parse_value;
pub use event::Event;
pub use event::EventKind;
pub use event::EventReceiver;
pub use event::RecursionGuard;
pub use event::ValidateWhitespace;

394
vendor/toml_parser/src/source.rs vendored Normal file
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@@ -0,0 +1,394 @@
use crate::decoder::Encoding;
use crate::decoder::StringBuilder;
use crate::lexer::Lexer;
use crate::ErrorSink;
use crate::Expected;
/// Data encoded as TOML
#[derive(Copy, Clone, Debug, PartialEq, Eq)]
pub struct Source<'i> {
input: &'i str,
}
impl<'i> Source<'i> {
pub fn new(input: &'i str) -> Self {
Self { input }
}
/// Start lexing the TOML encoded data
pub fn lex(&self) -> Lexer<'i> {
Lexer::new(self.input)
}
/// Access the TOML encoded `&str`
pub fn input(&self) -> &'i str {
self.input
}
/// Return a subslice of the input
pub fn get(&self, span: impl SourceIndex) -> Option<Raw<'i>> {
span.get(self)
}
/// Return an unchecked subslice of the input
///
/// ## Safety
///
/// Callers of this function are responsible that these preconditions are satisfied:
/// - The starting index must not exceed the ending index;
/// - Indexes must be within bounds of the original slice;
/// - Indexes must lie on UTF-8 sequence boundaries.
///
/// Or one of:
/// - `span` came from [`Source::lex`]
///
/// Failing any of those, the returned string slice may reference invalid memory or violate the invariants communicated by `str` type.
#[cfg(feature = "unsafe")]
pub unsafe fn get_unchecked(&self, span: impl SourceIndex) -> Raw<'i> {
// SAFETY: Same safety guarantees are required
unsafe { span.get_unchecked(self) }
}
/// Return a subslice of the input
fn get_raw_str(&self, span: Span) -> Option<&'i str> {
let index = span.start()..span.end();
self.input.get(index)
}
/// Return an unchecked subslice of the input
///
/// ## Safety
///
/// Callers of this function are responsible that these preconditions are satisfied:
/// - The starting index must not exceed the ending index;
/// - Indexes must be within bounds of the original slice;
/// - Indexes must lie on UTF-8 sequence boundaries.
///
/// Or one of:
/// - `span` came from [`Source::lex`]
///
/// Failing any of those, the returned string slice may reference invalid memory or violate the invariants communicated by `str` type.
#[cfg(feature = "unsafe")]
unsafe fn get_raw_str_unchecked(&self, span: Span) -> &'i str {
let index = span.start()..span.end();
// SAFETY: Same safety guarantees are required
unsafe { self.input.get_unchecked(index) }
}
}
/// A slice of [`Source`]
#[derive(Copy, Clone, Debug)]
pub struct Raw<'i> {
raw: &'i str,
encoding: Option<Encoding>,
span: Span,
}
impl<'i> Raw<'i> {
pub fn new_unchecked(raw: &'i str, encoding: Option<Encoding>, span: Span) -> Self {
Self {
raw,
encoding,
span,
}
}
pub fn decode_key(&self, output: &mut dyn StringBuilder<'i>, error: &mut dyn ErrorSink) {
let mut error = |err: crate::ParseError| {
error.report_error(err.rebase_spans(self.span.start));
};
match self.encoding {
Some(Encoding::LiteralString) => {
crate::decoder::string::decode_literal_string(*self, output, &mut error);
}
Some(Encoding::BasicString) => {
crate::decoder::string::decode_basic_string(*self, output, &mut error);
}
Some(Encoding::MlLiteralString) => {
error.report_error(
crate::ParseError::new("keys cannot be multi-line literal strings")
.with_expected(&[
Expected::Description("basic string"),
Expected::Description("literal string"),
])
.with_unexpected(Span::new_unchecked(0, self.len())),
);
crate::decoder::string::decode_ml_literal_string(*self, output, &mut error);
}
Some(Encoding::MlBasicString) => {
error.report_error(
crate::ParseError::new("keys cannot be multi-line basic strings")
.with_expected(&[
Expected::Description("basic string"),
Expected::Description("literal string"),
])
.with_unexpected(Span::new_unchecked(0, self.len())),
);
crate::decoder::string::decode_ml_basic_string(*self, output, &mut error);
}
None => crate::decoder::string::decode_unquoted_key(*self, output, &mut error),
}
}
#[must_use]
pub fn decode_scalar(
&self,
output: &mut dyn StringBuilder<'i>,
error: &mut dyn ErrorSink,
) -> crate::decoder::scalar::ScalarKind {
let mut error = |err: crate::ParseError| {
error.report_error(err.rebase_spans(self.span.start));
};
match self.encoding {
Some(Encoding::LiteralString) => {
crate::decoder::string::decode_literal_string(*self, output, &mut error);
crate::decoder::scalar::ScalarKind::String
}
Some(Encoding::BasicString) => {
crate::decoder::string::decode_basic_string(*self, output, &mut error);
crate::decoder::scalar::ScalarKind::String
}
Some(Encoding::MlLiteralString) => {
crate::decoder::string::decode_ml_literal_string(*self, output, &mut error);
crate::decoder::scalar::ScalarKind::String
}
Some(Encoding::MlBasicString) => {
crate::decoder::string::decode_ml_basic_string(*self, output, &mut error);
crate::decoder::scalar::ScalarKind::String
}
None => crate::decoder::scalar::decode_unquoted_scalar(*self, output, &mut error),
}
}
pub fn decode_whitespace(&self, _error: &mut dyn ErrorSink) {
// whitespace is always valid
}
pub fn decode_comment(&self, error: &mut dyn ErrorSink) {
let mut error = |err: crate::ParseError| {
error.report_error(err.rebase_spans(self.span.start));
};
crate::decoder::ws::decode_comment(*self, &mut error);
}
pub fn decode_newline(&self, error: &mut dyn ErrorSink) {
let mut error = |err: crate::ParseError| {
error.report_error(err.rebase_spans(self.span.start));
};
crate::decoder::ws::decode_newline(*self, &mut error);
}
pub fn as_str(&self) -> &'i str {
self.raw
}
pub fn as_bytes(&self) -> &'i [u8] {
self.raw.as_bytes()
}
pub fn len(&self) -> usize {
self.raw.len()
}
pub fn is_empty(&self) -> bool {
self.raw.is_empty()
}
}
/// Location within the [`Source`]
#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, Hash)]
pub struct Span {
start: usize,
end: usize,
}
impl Span {
pub fn new_unchecked(start: usize, end: usize) -> Self {
Self { start, end }
}
pub fn is_empty(&self) -> bool {
self.end <= self.start
}
pub fn len(&self) -> usize {
self.end - self.start
}
pub fn start(&self) -> usize {
self.start
}
pub fn end(&self) -> usize {
self.end
}
pub fn before(&self) -> Self {
Self::new_unchecked(self.start, self.start)
}
pub fn after(&self) -> Self {
Self::new_unchecked(self.end, self.end)
}
/// Extend this `Raw` to the end of `after`
#[must_use]
pub fn append(&self, after: Self) -> Self {
Self::new_unchecked(self.start, after.end)
}
}
impl core::fmt::Debug for Span {
fn fmt(&self, f: &mut core::fmt::Formatter<'_>) -> core::fmt::Result {
(self.start..self.end).fmt(f)
}
}
impl core::ops::Add<usize> for Span {
type Output = Self;
fn add(self, offset: usize) -> Self::Output {
Self::Output {
start: self.start + offset,
end: self.end + offset,
}
}
}
impl core::ops::Add<Span> for usize {
type Output = Span;
fn add(self, span: Span) -> Self::Output {
Self::Output {
start: span.start + self,
end: span.end + self,
}
}
}
impl core::ops::AddAssign<usize> for Span {
fn add_assign(&mut self, rhs: usize) {
self.start += rhs;
self.end += rhs;
}
}
/// A helper trait used for indexing operations on [`Source`]
pub trait SourceIndex: sealed::Sealed {
/// Return a subslice of the input
fn get<'i>(self, source: &Source<'i>) -> Option<Raw<'i>>;
/// Return an unchecked subslice of the input
///
/// ## Safety
///
/// Callers of this function are responsible that these preconditions are satisfied:
/// - The starting index must not exceed the ending index;
/// - Indexes must be within bounds of the original slice;
/// - Indexes must lie on UTF-8 sequence boundaries.
///
/// Or one of:
/// - `span` came from [`Source::lex`]
///
/// Failing any of those, the returned string slice may reference invalid memory or violate the invariants communicated by `str` type.
#[cfg(feature = "unsafe")]
unsafe fn get_unchecked<'i>(self, source: &Source<'i>) -> Raw<'i>;
}
impl SourceIndex for Span {
fn get<'i>(self, source: &Source<'i>) -> Option<Raw<'i>> {
(&self).get(source)
}
#[cfg(feature = "unsafe")]
unsafe fn get_unchecked<'i>(self, source: &Source<'i>) -> Raw<'i> {
// SAFETY: Same safety guarantees are required
unsafe { (&self).get_unchecked(source) }
}
}
impl SourceIndex for &Span {
fn get<'i>(self, source: &Source<'i>) -> Option<Raw<'i>> {
let encoding = None;
source
.get_raw_str(*self)
.map(|s| Raw::new_unchecked(s, encoding, *self))
}
#[cfg(feature = "unsafe")]
unsafe fn get_unchecked<'i>(self, source: &Source<'i>) -> Raw<'i> {
let encoding = None;
// SAFETY: Same safety guarantees are required
let raw = unsafe { source.get_raw_str_unchecked(*self) };
Raw::new_unchecked(raw, encoding, *self)
}
}
impl SourceIndex for crate::lexer::Token {
fn get<'i>(self, source: &Source<'i>) -> Option<Raw<'i>> {
(&self).get(source)
}
#[cfg(feature = "unsafe")]
unsafe fn get_unchecked<'i>(self, source: &Source<'i>) -> Raw<'i> {
// SAFETY: Same safety guarantees are required
unsafe { (&self).get_unchecked(source) }
}
}
impl SourceIndex for &crate::lexer::Token {
fn get<'i>(self, source: &Source<'i>) -> Option<Raw<'i>> {
let encoding = self.kind().encoding();
source
.get_raw_str(self.span())
.map(|s| Raw::new_unchecked(s, encoding, self.span()))
}
#[cfg(feature = "unsafe")]
unsafe fn get_unchecked<'i>(self, source: &Source<'i>) -> Raw<'i> {
let encoding = self.kind().encoding();
// SAFETY: Same safety guarantees are required
let raw = unsafe { source.get_raw_str_unchecked(self.span()) };
Raw::new_unchecked(raw, encoding, self.span())
}
}
impl SourceIndex for crate::parser::Event {
fn get<'i>(self, source: &Source<'i>) -> Option<Raw<'i>> {
(&self).get(source)
}
#[cfg(feature = "unsafe")]
unsafe fn get_unchecked<'i>(self, source: &Source<'i>) -> Raw<'i> {
// SAFETY: Same safety guarantees are required
unsafe { (&self).get_unchecked(source) }
}
}
impl SourceIndex for &crate::parser::Event {
fn get<'i>(self, source: &Source<'i>) -> Option<Raw<'i>> {
let encoding = self.encoding();
source
.get_raw_str(self.span())
.map(|s| Raw::new_unchecked(s, encoding, self.span()))
}
#[cfg(feature = "unsafe")]
unsafe fn get_unchecked<'i>(self, source: &Source<'i>) -> Raw<'i> {
let encoding = self.encoding();
// SAFETY: Same safety guarantees are required
let raw = unsafe { source.get_raw_str_unchecked(self.span()) };
Raw::new_unchecked(raw, encoding, self.span())
}
}
mod sealed {
pub trait Sealed {}
impl Sealed for crate::Span {}
impl Sealed for &crate::Span {}
impl Sealed for crate::lexer::Token {}
impl Sealed for &crate::lexer::Token {}
impl Sealed for crate::parser::Event {}
impl Sealed for &crate::parser::Event {}
}