71 lines
1.9 KiB
Rust
71 lines
1.9 KiB
Rust
#![cfg(not(miri))]
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#![recursion_limit = "1024"]
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#![feature(rustc_private)]
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#![allow(
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clippy::elidable_lifetime_names,
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clippy::manual_assert,
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clippy::match_like_matches_macro,
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clippy::needless_lifetimes,
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clippy::uninlined_format_args
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)]
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use crate::common::visit::{AsIfPrinted, FlattenParens};
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use quote::ToTokens as _;
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use std::fs;
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use std::panic;
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use std::path::Path;
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use std::sync::atomic::{AtomicUsize, Ordering};
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use syn::visit_mut::VisitMut as _;
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#[macro_use]
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mod macros;
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mod common;
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mod repo;
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#[test]
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fn test_unparenthesize() {
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repo::rayon_init();
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repo::clone_rust();
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let failed = AtomicUsize::new(0);
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repo::for_each_rust_file(|path| test(path, &failed));
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let failed = failed.into_inner();
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if failed > 0 {
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panic!("{} failures", failed);
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}
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}
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fn test(path: &Path, failed: &AtomicUsize) {
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let content = fs::read_to_string(path).unwrap();
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match panic::catch_unwind(|| -> syn::Result<()> {
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let mut before = syn::parse_file(&content)?;
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FlattenParens::discard_attrs().visit_file_mut(&mut before);
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let printed = before.to_token_stream();
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let mut after = syn::parse2::<syn::File>(printed.clone())?;
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FlattenParens::discard_attrs().visit_file_mut(&mut after);
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// Normalize features that we expect Syn not to print.
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AsIfPrinted.visit_file_mut(&mut before);
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if before != after {
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errorf!("=== {}\n", path.display());
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if failed.fetch_add(1, Ordering::Relaxed) == 0 {
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errorf!("BEFORE:\n{:#?}\nAFTER:\n{:#?}\n", before, after);
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}
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}
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Ok(())
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}) {
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Err(_) => {
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errorf!("=== {}: syn panic\n", path.display());
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failed.fetch_add(1, Ordering::Relaxed);
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}
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Ok(Err(msg)) => {
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errorf!("=== {}: syn failed to parse\n{:?}\n", path.display(), msg);
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failed.fetch_add(1, Ordering::Relaxed);
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}
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Ok(Ok(())) => {}
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}
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}
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