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Merge #1227

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1227: Add `default_type` method in `TypeParam` Node r=matklad a=edwin0cheng

This PR add a `default_type` method in `TypeParam` Node which allow future PR to handle #1099 case.

Co-authored-by: Edwin Cheng <edwin0cheng@gmail.com>
This commit is contained in:
bors[bot] 2019-05-03 13:06:55 +00:00
commit b29f442c8b
3 changed files with 8 additions and 1 deletions
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1
crates/ra_syntax/src/ast/generated.rs
View File

@ -4038,6 +4038,7 @@ impl ToOwned for TypeParam {
impl ast::NameOwner for TypeParam {}
impl ast::AttrsOwner for TypeParam {}
impl ast::TypeBoundsOwner for TypeParam {}
impl ast::DefaultTypeParamOwner for TypeParam {}
impl TypeParam {}
// TypeParamList

6
crates/ra_syntax/src/ast/traits.rs
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@ -152,3 +152,9 @@ impl<'a> Iterator for CommentIter<'a> {
self.iter.by_ref().find_map(|el| el.as_token().and_then(ast::Comment::cast))
}
}
pub trait DefaultTypeParamOwner: AstNode {
fn default_type(&self) -> Option<&ast::PathType> {
child_opt(self)
}
}

2
crates/ra_syntax/src/grammar.ron
View File

@ -563,7 +563,7 @@ Grammar(
["lifetime_params", "LifetimeParam" ],
]
),
"TypeParam": ( traits: ["NameOwner", "AttrsOwner", "TypeBoundsOwner"] ),
"TypeParam": ( traits: ["NameOwner", "AttrsOwner", "TypeBoundsOwner", "DefaultTypeParamOwner"] ),
"LifetimeParam": (
traits: ["AttrsOwner"],
),