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Simplify SymbolMangler::print_type.

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`Bound`/`Placeholder`/`Infer`/`Error` shouldn't occur, so we can handle
them in the second exhaustive `match`, and ignore them in the first
non-exhaustive `match`.
This commit is contained in:
Nicholas Nethercote 2025-08-01 13:10:35 +10:00
parent 1698c8e322
commit 03bc1be8dd
1 changed files with 4 additions and 7 deletions
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11
compiler/rustc_symbol_mangling/src/v0.rs
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@ -425,7 +425,6 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
ty::Bool => "b",
ty::Char => "c",
ty::Str => "e",
ty::Tuple(_) if ty.is_unit() => "u",
ty::Int(IntTy::I8) => "a",
ty::Int(IntTy::I16) => "s",
ty::Int(IntTy::I32) => "l",
@ -444,12 +443,12 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
ty::Float(FloatTy::F128) => "C4f128",
ty::Never => "z",
ty::Tuple(_) if ty.is_unit() => "u",
// Should only be encountered within the identity-substituted
// impl header of an item nested within an impl item.
ty::Param(_) => "p",
ty::Bound(..) | ty::Placeholder(_) | ty::Infer(_) | ty::Error(_) => bug!(),
_ => "",
};
if !basic_type.is_empty() {
@ -468,11 +467,9 @@ impl<'tcx> Printer<'tcx> for SymbolMangler<'tcx> {
unreachable!()
}
ty::Tuple(_) if ty.is_unit() => unreachable!(),
ty::Param(_) => unreachable!(),
// Placeholders, also handled as part of basic types.
ty::Param(_) | ty::Bound(..) | ty::Placeholder(_) | ty::Infer(_) | ty::Error(_) => {
unreachable!()
}
ty::Bound(..) | ty::Placeholder(_) | ty::Infer(_) | ty::Error(_) => bug!(),
ty::Ref(r, ty, mutbl) => {
self.push(match mutbl {