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Introduce AttrKind

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This commit is contained in:
Kirill Bulatov 2020-02-12 16:44:52 +02:00
parent 1596b31698
commit 848c576266
3 changed files with 16 additions and 8 deletions
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15
crates/ra_syntax/src/ast/extensions.rs
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@ -37,6 +37,12 @@ fn text_of_first_token(node: &SyntaxNode) -> &SmolStr {
node.green().children().next().and_then(|it| it.into_token()).unwrap().text()
}
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum AttrKind {
Inner,
Outer,
}
impl ast::Attr {
pub fn as_simple_atom(&self) -> Option<SmolStr> {
match self.input() {
@ -72,13 +78,16 @@ impl ast::Attr {
}
}
pub fn is_inner_attribute(&self) -> bool {
pub fn kind(&self) -> AttrKind {
let first_token = self.syntax().first_token();
let first_token_kind = first_token.as_ref().map(SyntaxToken::kind);
let second_token_kind =
first_token.and_then(|token| token.next_token()).as_ref().map(SyntaxToken::kind);
return first_token_kind == Some(SyntaxKind::POUND)
&& second_token_kind == Some(SyntaxKind::EXCL);
match (first_token_kind, second_token_kind) {
(Some(SyntaxKind::POUND), Some(SyntaxKind::EXCL)) => AttrKind::Inner,
_ => AttrKind::Outer,
}
}
}