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Make `Comments::next` consume a comment. 

This avoids the need for a clone, fixing a FIXME comment.
This commit is contained in:
Nicholas Nethercote 2024-05-13 10:06:27 +10:00
parent 5e7a80b2d2
commit 74e1b46ab2
1 changed files with 7 additions and 9 deletions
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16
compiler/rustc_ast_pretty/src/pprust/state.rs
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@ -55,8 +55,8 @@ impl PpAnn for NoAnn {}
pub struct Comments<'a> {
sm: &'a SourceMap,
comments: Vec<Comment>,
current: usize,
// Stored in reverse order so we can consume them by popping.
reversed_comments: Vec<Comment>,
}
/// Returns `None` if the first `col` chars of `s` contain a non-whitespace char.
@ -182,19 +182,17 @@ fn gather_comments(sm: &SourceMap, path: FileName, src: String) -> Vec<Comment>
impl<'a> Comments<'a> {
pub fn new(sm: &'a SourceMap, filename: FileName, input: String) -> Comments<'a> {
let comments = gather_comments(sm, filename, input);
Comments { sm, comments, current: 0 }
let mut comments = gather_comments(sm, filename, input);
comments.reverse();
Comments { sm, reversed_comments: comments }
}
fn peek(&self) -> Option<&Comment> {
self.comments.get(self.current)
self.reversed_comments.last()
}
// FIXME: This shouldn't probably clone lmao
fn next(&mut self) -> Option<Comment> {
let cmnt = self.comments.get(self.current).cloned();
self.current += 1;
cmnt
self.reversed_comments.pop()
}
fn trailing_comment(