bjoernager/rust
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support creating mutable allocations from byte slices

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This commit is contained in:
Ralf Jung 2021-05-23 12:03:39 +02:00
parent c3005e85da
commit 585141b219
8 changed files with 30 additions and 15 deletions
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4
compiler/rustc_mir_build/src/thir/constant.rs
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@ -25,14 +25,14 @@ crate fn lit_to_const<'tcx>(
let lit = match (lit, &ty.kind()) {
(ast::LitKind::Str(s, _), ty::Ref(_, inner_ty, _)) if inner_ty.is_str() => {
let s = s.as_str();
let allocation = Allocation::from_byte_aligned_bytes(s.as_bytes());
let allocation = Allocation::from_bytes_byte_aligned_immutable(s.as_bytes());
let allocation = tcx.intern_const_alloc(allocation);
ConstValue::Slice { data: allocation, start: 0, end: s.len() }
}
(ast::LitKind::ByteStr(data), ty::Ref(_, inner_ty, _))
if matches!(inner_ty.kind(), ty::Slice(_)) =>
{
let allocation = Allocation::from_byte_aligned_bytes(data as &[u8]);
let allocation = Allocation::from_bytes_byte_aligned_immutable(data as &[u8]);
let allocation = tcx.intern_const_alloc(allocation);
ConstValue::Slice { data: allocation, start: 0, end: data.len() }
}