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Make top-level rustc_parse functions fallible.

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Currently we have an awkward mix of fallible and infallible functions:
```
       new_parser_from_source_str
 maybe_new_parser_from_source_str
       new_parser_from_file
(maybe_new_parser_from_file)        // missing
      (new_parser_from_source_file) // missing
 maybe_new_parser_from_source_file
       source_str_to_stream
 maybe_source_file_to_stream
```
We could add the two missing functions, but instead this commit removes
of all the infallible ones and renames the fallible ones leaving us with
these which are all fallible:
```
new_parser_from_source_str
new_parser_from_file
new_parser_from_source_file
source_str_to_stream
source_file_to_stream
```
This requires making `unwrap_or_emit_fatal` public so callers of
formerly infallible functions can still work.

This does make some of the call sites slightly more verbose, but I think
it's worth it for the simpler API. Also, there are two `catch_unwind`
calls and one `catch_fatal_errors` call in this diff that become
removable thanks this change. (I will do that in a follow-up PR.)
This commit is contained in:
Nicholas Nethercote 2024-05-31 15:43:18 +10:00
parent 9f4a2dd147
commit e8d02fe1cb
1 changed files with 2 additions and 2 deletions
Download patch file Download diff file Expand all files Collapse all files

4
clippy_lints/src/doc/needless_doctest_main.rs
View file

@ -8,7 +8,7 @@ use rustc_data_structures::sync::Lrc;
use rustc_errors::emitter::HumanEmitter;
use rustc_errors::{Diag, DiagCtxt};
use rustc_lint::LateContext;
use rustc_parse::maybe_new_parser_from_source_str;
use rustc_parse::new_parser_from_source_str;
use rustc_parse::parser::ForceCollect;
use rustc_session::parse::ParseSess;
use rustc_span::edition::Edition;
@ -50,7 +50,7 @@ pub fn check(
let sm = Lrc::new(SourceMap::new(FilePathMapping::empty()));
let psess = ParseSess::with_dcx(dcx, sm);
let mut parser = match maybe_new_parser_from_source_str(&psess, filename, code) {
let mut parser = match new_parser_from_source_str(&psess, filename, code) {
Ok(p) => p,
Err(errs) => {
errs.into_iter().for_each(Diag::cancel);