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Lower fully qualified associated type paths

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I.e. `<T as Trait>::Foo`.
This commit is contained in:
Florian Diebold 2019-08-05 22:42:38 +02:00
parent 6cfdfdecba
commit 22724f37f3
5 changed files with 128 additions and 23 deletions
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10
crates/ra_syntax/src/ast/extensions.rs
View file

@ -91,6 +91,7 @@ impl ast::Attr {
#[derive(Debug, Clone, PartialEq, Eq)]
pub enum PathSegmentKind {
Name(ast::NameRef),
Type { type_ref: Option<ast::TypeRef>, trait_ref: Option<ast::PathType> },
SelfKw,
SuperKw,
CrateKw,
@ -112,6 +113,15 @@ impl ast::PathSegment {
T![self] => PathSegmentKind::SelfKw,
T![super] => PathSegmentKind::SuperKw,
T![crate] => PathSegmentKind::CrateKw,
T![<] => {
// <T> or <T as Trait>
// T is any TypeRef, Trait has to be a PathType
let mut type_refs =
self.syntax().children().filter(|node| ast::TypeRef::can_cast(node.kind()));
let type_ref = type_refs.next().and_then(ast::TypeRef::cast);
let trait_ref = type_refs.next().and_then(ast::PathType::cast);
PathSegmentKind::Type { type_ref, trait_ref }
}
_ => return None,
}
};