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Diffstat (limited to 'vendor/syn/tests/test_round_trip.rs')
| -rw-r--r-- | vendor/syn/tests/test_round_trip.rs | 239 |
1 files changed, 0 insertions, 239 deletions
diff --git a/vendor/syn/tests/test_round_trip.rs b/vendor/syn/tests/test_round_trip.rs deleted file mode 100644 index a673fff..0000000 --- a/vendor/syn/tests/test_round_trip.rs +++ /dev/null @@ -1,239 +0,0 @@ -#![cfg(not(syn_disable_nightly_tests))] -#![cfg(not(miri))] -#![recursion_limit = "1024"] -#![feature(rustc_private)] -#![allow( - clippy::blocks_in_conditions, - clippy::manual_assert, - clippy::manual_let_else, - clippy::match_like_matches_macro, - clippy::uninlined_format_args -)] - -extern crate rustc_ast; -extern crate rustc_ast_pretty; -extern crate rustc_data_structures; -extern crate rustc_driver; -extern crate rustc_error_messages; -extern crate rustc_errors; -extern crate rustc_expand; -extern crate rustc_parse as parse; -extern crate rustc_session; -extern crate rustc_span; - -use crate::common::eq::SpanlessEq; -use quote::quote; -use rustc_ast::ast::{ - AngleBracketedArg, AngleBracketedArgs, Crate, GenericArg, GenericParamKind, Generics, - WhereClause, -}; -use rustc_ast::mut_visit::{self, MutVisitor}; -use rustc_ast_pretty::pprust; -use rustc_error_messages::{DiagnosticMessage, LazyFallbackBundle}; -use rustc_errors::{translation, Diagnostic, PResult}; -use rustc_session::parse::ParseSess; -use rustc_span::source_map::FilePathMapping; -use rustc_span::FileName; -use std::borrow::Cow; -use std::fs; -use std::panic; -use std::path::Path; -use std::process; -use std::sync::atomic::{AtomicUsize, Ordering}; -use std::time::Instant; - -#[macro_use] -mod macros; - -#[allow(dead_code)] -mod common; - -mod repo; - -#[test] -fn test_round_trip() { - common::rayon_init(); - repo::clone_rust(); - let abort_after = common::abort_after(); - if abort_after == 0 { - panic!("Skipping all round_trip tests"); - } - - let failed = AtomicUsize::new(0); - - repo::for_each_rust_file(|path| test(path, &failed, abort_after)); - - let failed = failed.load(Ordering::Relaxed); - if failed > 0 { - panic!("{} failures", failed); - } -} - -fn test(path: &Path, failed: &AtomicUsize, abort_after: usize) { - let content = fs::read_to_string(path).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::Relaxed); - if prev_failed + 1 >= abort_after { - process::exit(1); - } - return; - } - }; - let back = quote!(#krate).to_string(); - let edition = repo::edition(path).parse().unwrap(); - - rustc_span::create_session_if_not_set_then(edition, |_| { - let equal = match panic::catch_unwind(|| { - let locale_resources = rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(); - let file_path_mapping = FilePathMapping::empty(); - let sess = ParseSess::new(locale_resources, file_path_mapping); - let before = match librustc_parse(content, &sess) { - Ok(before) => before, - Err(diagnostic) => { - errorf!( - "=== {}: ignore - librustc failed to parse original content: {}\n", - path.display(), - translate_message(&diagnostic), - ); - diagnostic.cancel(); - return Err(true); - } - }; - let after = match librustc_parse(back, &sess) { - Ok(after) => after, - Err(mut diagnostic) => { - errorf!("=== {}: librustc failed to parse", path.display()); - diagnostic.emit(); - return Err(false); - } - }; - Ok((before, after)) - }) { - Err(_) => { - errorf!("=== {}: ignoring librustc panic\n", path.display()); - true - } - Ok(Err(equal)) => equal, - Ok(Ok((mut before, mut after))) => { - normalize(&mut before); - normalize(&mut after); - 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\n{}\n!=\n{}\n", - path.display(), - pprust::crate_to_string_for_macros(&before), - pprust::crate_to_string_for_macros(&after), - ); - false - } - } - }; - if !equal { - let prev_failed = failed.fetch_add(1, Ordering::Relaxed); - if prev_failed + 1 >= abort_after { - process::exit(1); - } - } - }); -} - -fn librustc_parse(content: String, sess: &ParseSess) -> PResult<Crate> { - static COUNTER: AtomicUsize = AtomicUsize::new(0); - let counter = COUNTER.fetch_add(1, Ordering::Relaxed); - let name = FileName::Custom(format!("test_round_trip{}", counter)); - parse::parse_crate_from_source_str(name, content, sess) -} - -fn translate_message(diagnostic: &Diagnostic) -> Cow<'static, str> { - thread_local! { - static FLUENT_BUNDLE: LazyFallbackBundle = { - let locale_resources = rustc_driver::DEFAULT_LOCALE_RESOURCES.to_vec(); - let with_directionality_markers = false; - rustc_error_messages::fallback_fluent_bundle(locale_resources, with_directionality_markers) - }; - } - - let message = &diagnostic.messages[0].0; - let args = translation::to_fluent_args(diagnostic.args()); - - let (identifier, attr) = match message { - DiagnosticMessage::Str(msg) | DiagnosticMessage::Eager(msg) => return msg.clone(), - DiagnosticMessage::FluentIdentifier(identifier, attr) => (identifier, attr), - }; - - FLUENT_BUNDLE.with(|fluent_bundle| { - let message = fluent_bundle - .get_message(identifier) - .expect("missing diagnostic in fluent bundle"); - let value = match attr { - Some(attr) => message - .get_attribute(attr) - .expect("missing attribute in fluent message") - .value(), - None => message.value().expect("missing value in fluent message"), - }; - - let mut err = Vec::new(); - let translated = fluent_bundle.format_pattern(value, Some(&args), &mut err); - assert!(err.is_empty()); - Cow::Owned(translated.into_owned()) - }) -} - -fn normalize(krate: &mut Crate) { - struct NormalizeVisitor; - - impl MutVisitor for NormalizeVisitor { - fn visit_angle_bracketed_parameter_data(&mut self, e: &mut AngleBracketedArgs) { - #[derive(Ord, PartialOrd, Eq, PartialEq)] - enum Group { - Lifetimes, - TypesAndConsts, - Constraints, - } - e.args.sort_by_key(|arg| match arg { - AngleBracketedArg::Arg(arg) => match arg { - GenericArg::Lifetime(_) => Group::Lifetimes, - GenericArg::Type(_) | GenericArg::Const(_) => Group::TypesAndConsts, - }, - AngleBracketedArg::Constraint(_) => Group::Constraints, - }); - mut_visit::noop_visit_angle_bracketed_parameter_data(e, self); - } - - fn visit_generics(&mut self, e: &mut Generics) { - #[derive(Ord, PartialOrd, Eq, PartialEq)] - enum Group { - Lifetimes, - TypesAndConsts, - } - e.params.sort_by_key(|param| match param.kind { - GenericParamKind::Lifetime => Group::Lifetimes, - GenericParamKind::Type { .. } | GenericParamKind::Const { .. } => { - Group::TypesAndConsts - } - }); - mut_visit::noop_visit_generics(e, self); - } - - fn visit_where_clause(&mut self, e: &mut WhereClause) { - if e.predicates.is_empty() { - e.has_where_token = false; - } - } - } - - NormalizeVisitor.visit_crate(krate); -} |