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Clean up NestedAttributesExt trait/implementation

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Roc Yu 2021-12-22 15:37:49 -05:00
parent c09a9529c5
commit 91fe2d0ed7
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1 changed files with 15 additions and 10 deletions
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25
src/librustdoc/clean/types.rs
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@ -879,20 +879,25 @@ impl AttributesExt for [ast::Attribute] {
}
crate trait NestedAttributesExt {
/// Returns `true` if the attribute list contains a specific `Word`
fn has_word(self, word: Symbol) -> bool;
/// Returns `true` if the attribute list contains a specific `word`
fn has_word(self, word: Symbol) -> bool
where
Self: std::marker::Sized,
{
<Self as NestedAttributesExt>::get_word_attr(self, word).is_some()
}
/// Returns `Some(attr)` if the attribute list contains 'attr'
/// corresponding to a specific `word`
fn get_word_attr(self, word: Symbol) -> Option<ast::NestedMetaItem>;
}
impl<I: Iterator<Item = ast::NestedMetaItem> + IntoIterator<Item = ast::NestedMetaItem>>
NestedAttributesExt for I
impl<I> NestedAttributesExt for I
where
I: IntoIterator<Item = ast::NestedMetaItem>,
{
fn has_word(self, word: Symbol) -> bool {
self.into_iter().any(|attr| attr.is_word() && attr.has_name(word))
}
fn get_word_attr(mut self, word: Symbol) -> Option<ast::NestedMetaItem> {
self.find(|attr| attr.is_word() && attr.has_name(word))
fn get_word_attr(self, word: Symbol) -> Option<ast::NestedMetaItem> {
self.into_iter().find(|attr| attr.is_word() && attr.has_name(word))
}
}