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Avoid Ty to String conversions #100012

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Aug 1, 2022
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Avoid Ty to String conversions #100012

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9 changes: 4 additions & 5 deletions compiler/rustc_trait_selection/src/traits/error_reporting/on_unimplemented.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -223,8 +223,7 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
if let Some(def) = aty.ty_adt_def() {
// We also want to be able to select the slice's type's original
// signature with no type arguments resolved
let type_string = self.tcx.type_of(def.did()).to_string();
flags.push((sym::_Self, Some(format!("[{type_string}]"))));
flags.push((sym::_Self, Some(format!("[{}]", self.tcx.type_of(def.did())))));
}
if aty.is_integral() {
flags.push((sym::_Self, Some("[{integral}]".to_string())));
Expand All @@ -242,10 +241,10 @@ impl<'a, 'tcx> InferCtxtExt<'tcx> for InferCtxt<'a, 'tcx> {
if let Some(def) = aty.ty_adt_def() {
// We also want to be able to select the array's type's original
// signature with no type arguments resolved
let type_string = self.tcx.type_of(def.did()).to_string();
flags.push((sym::_Self, Some(format!("[{type_string}; _]"))));
let def_ty = self.tcx.type_of(def.did());
flags.push((sym::_Self, Some(format!("[{def_ty}; _]"))));
if let Some(n) = len {
flags.push((sym::_Self, Some(format!("[{type_string}; {n}]"))));
flags.push((sym::_Self, Some(format!("[{def_ty}; {n}]"))));
}
}
if aty.is_integral() {
Expand Down