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Diffstat (limited to 'crates/hir-def/src/path.rs')
| -rw-r--r-- | crates/hir-def/src/path.rs | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/crates/hir-def/src/path.rs b/crates/hir-def/src/path.rs index 713e738973..8f170fb983 100644 --- a/crates/hir-def/src/path.rs +++ b/crates/hir-def/src/path.rs @@ -79,6 +79,19 @@ thin_vec_with_header_struct! { } } +#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash)] +pub enum GenericArgsParentheses { + No, + /// Bounds of the form `Type::method(..): Send` or `impl Trait<method(..): Send>`, + /// aka. Return Type Notation or RTN. + ReturnTypeNotation, + /// `Fn`-family parenthesized traits, e.g. `impl Fn(u32) -> String`. + /// + /// This is desugared into one generic argument containing a tuple of all arguments, + /// and an associated type binding for `Output` for the return type. + ParenSugar, +} + /// Generic arguments to a path segment (e.g. the `i32` in `Option<i32>`). This /// also includes bindings of associated types, like in `Iterator<Item = Foo>`. #[derive(Debug, Clone, PartialEq, Eq, Hash)] @@ -92,9 +105,8 @@ pub struct GenericArgs { pub has_self_type: bool, /// Associated type bindings like in `Iterator<Item = T>`. pub bindings: Box<[AssociatedTypeBinding]>, - /// Whether these generic args were desugared from `Trait(Arg) -> Output` - /// parenthesis notation typically used for the `Fn` traits. - pub desugared_from_fn: bool, + /// Whether these generic args were written with parentheses and how. + pub parenthesized: GenericArgsParentheses, } /// An associated type binding like in `Iterator<Item = T>`. @@ -326,7 +338,16 @@ impl GenericArgs { args: Box::default(), has_self_type: false, bindings: Box::default(), - desugared_from_fn: false, + parenthesized: GenericArgsParentheses::No, + } + } + + pub(crate) fn return_type_notation() -> GenericArgs { + GenericArgs { + args: Box::default(), + has_self_type: false, + bindings: Box::default(), + parenthesized: GenericArgsParentheses::ReturnTypeNotation, } } } |