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interpret: refactor projection code to work on a common trait, and use that for visitors

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This commit is contained in:
Ralf Jung
2023-07-24 11:44:58 +02:00
parent a593de4fab
commit a2bcafa500
44 changed files with 863 additions and 1210 deletions
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4
compiler/rustc_const_eval/src/const_eval/mod.rs
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@@ -102,7 +102,7 @@ pub(crate) fn try_destructure_mir_constant_for_diagnostics<'tcx>(
}
ty::Adt(def, _) => {
let variant = ecx.read_discriminant(&op).ok()?.1;
let down = ecx.operand_downcast(&op, variant).ok()?;
let down = ecx.project_downcast(&op, variant).ok()?;
(def.variants()[variant].fields.len(), Some(variant), down)
}
ty::Tuple(args) => (args.len(), None, op),
@@ -111,7 +111,7 @@ pub(crate) fn try_destructure_mir_constant_for_diagnostics<'tcx>(
let fields_iter = (0..field_count)
.map(|i| {
let field_op = ecx.operand_field(&down, i).ok()?;
let field_op = ecx.project_field(&down, i).ok()?;
let val = op_to_const(&ecx, &field_op);
Some((val, field_op.layout.ty))
})