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#![cfg(not(syn_disable_nightly_tests))]
#![recursion_limit = "1024"]
#![feature(rustc_private)]
extern crate rustc_expand;
extern crate rustc_parse as parse;
extern crate rustc_span;
extern crate syntax;
mod features;
use quote::quote;
use rayon::iter::{IntoParallelIterator, ParallelIterator};
use rustc_span::edition::Edition;
use rustc_span::FileName;
use syntax::ast;
use syntax::errors::PResult;
use syntax::sess::ParseSess;
use syntax::source_map::FilePathMapping;
use walkdir::{DirEntry, WalkDir};
use std::fs::File;
use std::io::Read;
use std::panic;
use std::process;
use std::sync::atomic::{AtomicUsize, Ordering};
use std::time::Instant;
#[macro_use]
mod macros;
#[allow(dead_code)]
mod common;
mod repo;
use common::eq::SpanlessEq;
#[test]
fn test_round_trip() {
repo::clone_rust();
let abort_after = common::abort_after();
if abort_after == 0 {
panic!("Skipping all round_trip tests");
}
let failed = AtomicUsize::new(0);
WalkDir::new("tests/rust")
.sort_by(|a, b| a.file_name().cmp(b.file_name()))
.into_iter()
.filter_entry(repo::base_dir_filter)
.collect::<Result<Vec<DirEntry>, walkdir::Error>>()
.unwrap()
.into_par_iter()
.for_each(|entry| {
let path = entry.path();
if path.is_dir() {
return;
}
let mut file = File::open(path).unwrap();
let mut content = String::new();
file.read_to_string(&mut content).unwrap();
let start = Instant::now();
let (krate, elapsed) = match syn::parse_file(&content) {
Ok(krate) => (krate, start.elapsed()),
Err(msg) => {
errorf!("=== {}: syn failed to parse\n{:?}\n", path.display(), msg);
let prev_failed = failed.fetch_add(1, Ordering::SeqCst);
if prev_failed + 1 >= abort_after {
process::exit(1);
}
return;
}
};
let back = quote!(#krate).to_string();
let equal = panic::catch_unwind(|| {
syntax::with_globals(Edition::Edition2018, || {
let sess = ParseSess::new(FilePathMapping::empty());
let before = match libsyntax_parse(content, &sess) {
Ok(before) => before,
Err(mut diagnostic) => {
diagnostic.cancel();
if diagnostic
.message()
.starts_with("file not found for module")
{
errorf!("=== {}: ignore\n", path.display());
} else {
errorf!(
"=== {}: ignore - libsyntax failed to parse original content: {}\n",
path.display(),
diagnostic.message()
);
}
return true;
}
};
let after = match libsyntax_parse(back, &sess) {
Ok(after) => after,
Err(mut diagnostic) => {
errorf!("=== {}: libsyntax failed to parse", path.display());
diagnostic.emit();
return false;
}
};
if SpanlessEq::eq(&before, &after) {
errorf!(
"=== {}: pass in {}ms\n",
path.display(),
elapsed.as_secs() * 1000
+ u64::from(elapsed.subsec_nanos()) / 1_000_000
);
true
} else {
errorf!(
"=== {}: FAIL\nbefore: {:#?}\nafter: {:#?}\n",
path.display(),
before,
after,
);
false
}
})
});
match equal {
Err(_) => errorf!("=== {}: ignoring libsyntax panic\n", path.display()),
Ok(true) => {}
Ok(false) => {
let prev_failed = failed.fetch_add(1, Ordering::SeqCst);
if prev_failed + 1 >= abort_after {
process::exit(1);
}
}
}
});
let failed = failed.load(Ordering::SeqCst);
if failed > 0 {
panic!("{} failures", failed);
}
}
fn libsyntax_parse(content: String, sess: &ParseSess) -> PResult<ast::Crate> {
let name = FileName::Custom("test_round_trip".to_string());
parse::parse_crate_from_source_str(name, content, sess)
}
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