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Rollup merge of #104786 - WaffleLapkin:amp-mut-help, r=compiler-errors

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Use the power of adding helper function to simplify code w/ `Mutability`

r? `@compiler-errors`
This commit is contained in:
Guillaume Gomez 2022-11-26 17:47:23 +01:00 • committed by GitHub
commit a2e485c25c
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28 changed files with 144 additions and 218 deletions
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4
compiler/rustc_lint/src/builtin.rs
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@ -1268,10 +1268,10 @@ declare_lint_pass!(MutableTransmutes => [MUTABLE_TRANSMUTES]);
impl<'tcx> LateLintPass<'tcx> for MutableTransmutes {
fn check_expr(&mut self, cx: &LateContext<'_>, expr: &hir::Expr<'_>) {
if let Some((&ty::Ref(_, _, from_mt), &ty::Ref(_, _, to_mt))) =
if let Some((&ty::Ref(_, _, from_mutbl), &ty::Ref(_, _, to_mutbl))) =
get_transmute_from_to(cx, expr).map(|(ty1, ty2)| (ty1.kind(), ty2.kind()))
{
if to_mt == hir::Mutability::Mut && from_mt == hir::Mutability::Not {
if from_mutbl < to_mutbl {
cx.struct_span_lint(
MUTABLE_TRANSMUTES,
expr.span,