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Add note to the docs on is_from_proc_macro

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This commit is contained in:
Jason Newcomb 2022-04-24 10:04:33 -04:00
parent 670efd5720
commit 8dda974a27
1 changed files with 4 additions and 1 deletions
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5
clippy_utils/src/check_proc_macro.rs
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@ -271,7 +271,10 @@ impl_with_search_pat!(LateContext: ImplItem with impl_item_search_pat);
impl_with_search_pat!(LateContext: FieldDef with field_def_search_pat);
impl_with_search_pat!(LateContext: Variant with variant_search_pat);
/// Checks if the item likely came from a proc-macro
/// Checks if the item likely came from a proc-macro.
///
/// This should be called after `in_external_macro` and the initial pattern matching of the ast as
/// it is significantly slower than both of those.
pub fn is_from_proc_macro<T: WithSearchPat>(cx: &T::Context, item: &T) -> bool {
let (start_pat, end_pat) = item.search_pat(cx);
!span_matches_pat(cx.sess(), item.span(), start_pat, end_pat)