bjoernager/rust
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Make #[repr(Rust)] and #[repr(C)] incompatible with one another

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This commit is contained in:
León Orell Valerian Liehr 2023-10-17 03:06:52 +02:00
parent 1bc0463b18
commit d0b99e3efe
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GPG key ID: D17A07215F68E713
4 changed files with 80 additions and 4 deletions
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13
compiler/rustc_passes/src/check_attr.rs
View file

@ -1767,6 +1767,7 @@ impl CheckAttrVisitor<'_> {
.collect();
let mut int_reprs = 0;
let mut is_explicit_rust = false;
let mut is_c = false;
let mut is_simd = false;
let mut is_transparent = false;
@ -1778,7 +1779,9 @@ impl CheckAttrVisitor<'_> {
}
match hint.name_or_empty() {
sym::Rust => {}
sym::Rust => {
is_explicit_rust = true;
}
sym::C => {
is_c = true;
match target {
@ -1888,12 +1891,16 @@ impl CheckAttrVisitor<'_> {
// Error on repr(transparent, <anything else>).
if is_transparent && hints.len() > 1 {
let hint_spans: Vec<_> = hint_spans.clone().collect();
let hint_spans = hint_spans.clone().collect();
self.tcx.sess.emit_err(errors::TransparentIncompatible {
hint_spans,
target: target.to_string(),
});
}
if is_explicit_rust && (int_reprs > 0 || is_c || is_simd) {
let hint_spans = hint_spans.clone().collect();
self.tcx.sess.emit_err(errors::ReprConflicting { hint_spans });
}
// Warn on repr(u8, u16), repr(C, simd), and c-like-enum-repr(C, u8)
if (int_reprs > 1)
|| (is_simd && is_c)
@ -1910,7 +1917,7 @@ impl CheckAttrVisitor<'_> {
CONFLICTING_REPR_HINTS,
hir_id,
hint_spans.collect::<Vec<Span>>(),
errors::ReprConflicting,
errors::ReprConflictingLint,
);
}
}

9
compiler/rustc_passes/src/errors.rs
View file

@ -558,9 +558,16 @@ pub struct ReprIdent {
pub span: Span,
}
#[derive(Diagnostic)]
#[diag(passes_repr_conflicting, code = "E0566")]
pub struct ReprConflicting {
#[primary_span]
pub hint_spans: Vec<Span>,
}
#[derive(LintDiagnostic)]
#[diag(passes_repr_conflicting, code = "E0566")]
pub struct ReprConflicting;
pub struct ReprConflictingLint;
#[derive(Diagnostic)]
#[diag(passes_used_static)]