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Begin generating semantic reprs for records

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Ayaz Hafiz 2023-05-10 15:38:25 -05:00
parent 6714a6fd92
commit c06ffc434b
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4 changed files with 40 additions and 12 deletions
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2
crates/compiler/mono/src/layout/intern.rs
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@ -127,7 +127,7 @@ impl<'a> Layout<'a> {
field_layouts: &[],
field_order_hash: FieldOrderHash::ZERO_FIELD_HASH,
},
semantic: SemanticRepr::None,
semantic: SemanticRepr::EMPTY_RECORD,
};
pub const fn float_width(w: FloatWidth) -> InLayout<'static> {

24
crates/compiler/mono/src/layout/semantic.rs Normal file
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@ -0,0 +1,24 @@
//! Semantic representations of memory layouts for the purposes of specialization.
/// A semantic representation of a memory layout.
/// Semantic representations describe the shape of a type a [Layout][super::Layout] is generated
/// for. Semantic representations disambiguate types that have the same runtime memory layout, but
/// different shapes.
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub enum SemanticRepr<'a> {
None,
Record(SemaRecord<'a>),
}
impl<'a> SemanticRepr<'a> {
pub(super) const EMPTY_RECORD: Self = Self::Record(SemaRecord { fields: &[] });
pub(super) fn record(fields: &'a [&'a str]) -> Self {
Self::Record(SemaRecord { fields })
}
}
#[derive(Clone, Copy, Debug, PartialEq, Eq, Hash, PartialOrd, Ord)]
pub struct SemaRecord<'a> {
pub fields: &'a [&'a str],
}