bjoernager/rust
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Implement mut ref/mut ref mut

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This commit is contained in:
Jules Bertholet 2024-03-23 21:04:45 -04:00
parent 10a7aa14fe
commit e0da13f25f
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51 changed files with 442 additions and 378 deletions
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19
compiler/rustc_ast/src/ast.rs
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@ -702,19 +702,10 @@ pub struct PatField {
#[derive(Clone, Copy, Debug, Eq, PartialEq)]
#[derive(Encodable, Decodable, HashStable_Generic)]
pub enum ByRef {
Yes,
Yes(Mutability),
No,
}
impl From<bool> for ByRef {
fn from(b: bool) -> ByRef {
match b {
false => ByRef::No,
true => ByRef::Yes,
}
}
}
/// Explicit binding annotations given in the HIR for a binding. Note
/// that this is not the final binding *mode* that we infer after type
/// inference.
@ -724,9 +715,11 @@ pub struct BindingAnnotation(pub ByRef, pub Mutability);
impl BindingAnnotation {
pub const NONE: Self = Self(ByRef::No, Mutability::Not);
pub const REF: Self = Self(ByRef::Yes, Mutability::Not);
pub const REF: Self = Self(ByRef::Yes(Mutability::Not), Mutability::Not);
pub const MUT: Self = Self(ByRef::No, Mutability::Mut);
pub const REF_MUT: Self = Self(ByRef::Yes, Mutability::Mut);
pub const REF_MUT: Self = Self(ByRef::Yes(Mutability::Mut), Mutability::Not);
pub const MUT_REF: Self = Self(ByRef::Yes(Mutability::Not), Mutability::Mut);
pub const MUT_REF_MUT: Self = Self(ByRef::Yes(Mutability::Mut), Mutability::Mut);
pub fn prefix_str(self) -> &'static str {
match self {
@ -734,6 +727,8 @@ impl BindingAnnotation {
Self::REF => "ref ",
Self::MUT => "mut ",
Self::REF_MUT => "ref mut ",
Self::MUT_REF => "mut ref ",
Self::MUT_REF_MUT => "mut ref mut ",
}
}
}