Simplify RefTokenTreeCursor::look_ahead.

nnethercote · nnethercote · commit 5c200c225514 · 2024-12-18T10:31:39.000+11:00
It's only ever used with a lookahead of 0, so this commit removes the
lookahead and renames it `peek`.
diff --git a/clippy_lints/src/crate_in_macro_def.rs b/clippy_lints/src/crate_in_macro_def.rs
@@ -86,7 +86,7 @@ fn contains_unhygienic_crate_reference(tts: &TokenStream) -> Option<Span> {
     while let Some(curr) = cursor.next() {
         if !prev_is_dollar
             && let Some(span) = is_crate_keyword(curr)
-            && let Some(next) = cursor.look_ahead(0)
+            && let Some(next) = cursor.peek()
             && is_token(next, &TokenKind::PathSep)
         {
             return Some(span);

Original file line number	Diff line number	Diff line change
`@@ -86,7 +86,7 @@ fn contains_unhygienic_crate_reference(tts: &TokenStream) -> Option<Span> {`
`86`	`86`	`while let Some(curr) = cursor.next() {`
`87`	`87`	`if !prev_is_dollar`
`88`	`88`	`&& let Some(span) = is_crate_keyword(curr)`
`89`		`- && let Some(next) = cursor.look_ahead(0)`
	`89`	`+ && let Some(next) = cursor.peek()`
`90`	`90`	`&& is_token(next, &TokenKind::PathSep)`
`91`	`91`	`{`
`92`	`92`	`return Some(span);`