bjoernager/rust
bjoernager/rust
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add eq constraints on associated constants

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kadmin 2021-07-30 08:56:45 +00:00
parent a34c079752
commit 0765999622
23 changed files with 195 additions and 113 deletions
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14
compiler/rustc_ast/src/ast.rs
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@ -224,7 +224,7 @@ pub enum AngleBracketedArg {
/// Argument for a generic parameter.
Arg(GenericArg),
/// Constraint for an associated item.
Constraint(AssocTyConstraint),
Constraint(AssocConstraint),
}
impl AngleBracketedArg {
@ -1843,19 +1843,21 @@ impl UintTy {
/// A constraint on an associated type (e.g., `A = Bar` in `Foo<A = Bar>` or
/// `A: TraitA + TraitB` in `Foo<A: TraitA + TraitB>`).
#[derive(Clone, Encodable, Decodable, Debug)]
pub struct AssocTyConstraint {
pub struct AssocConstraint {
pub id: NodeId,
pub ident: Ident,
pub gen_args: Option<GenericArgs>,
pub kind: AssocTyConstraintKind,
pub kind: AssocConstraintKind,
pub span: Span,
}
/// The kinds of an `AssocTyConstraint`.
/// The kinds of an `AssocConstraint`.
#[derive(Clone, Encodable, Decodable, Debug)]
pub enum AssocTyConstraintKind {
/// E.g., `A = Bar` in `Foo<A = Bar>`.
pub enum AssocConstraintKind {
/// E.g., `A = Bar` in `Foo<A = Bar>` where A is an associated type.
Equality { ty: P<Ty> },
/// E.g., `A = 3` in `Foo<N = 3>` where N is an associated const.
ConstEquality { c: AnonConst },
/// E.g. `A: TraitA + TraitB` in `Foo<A: TraitA + TraitB>`.
Bound { bounds: GenericBounds },
}