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More chalk work

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This commit is contained in:
Jack Huey
2020-08-04 22:28:59 -04:00
parent d66452c3e5
commit 76c728901e
4 changed files with 492 additions and 345 deletions
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38
compiler/rustc_middle/src/traits/chalk.rs
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@@ -109,6 +109,44 @@ impl<'tcx> chalk_ir::interner::Interner for RustInterner<'tcx> {
application_ty: &chalk_ir::ApplicationTy<Self>,
fmt: &mut fmt::Formatter<'_>,
) -> Option<fmt::Result> {
match application_ty.name {
chalk_ir::TypeName::Ref(mutbl) => {
let data = application_ty.substitution.interned();
let lifetime = match &**data[0].interned() {
chalk_ir::GenericArgData::Lifetime(t) => t,
_ => unreachable!(),
};
let ty = match &**data[1].interned() {
chalk_ir::GenericArgData::Ty(t) => t,
_ => unreachable!(),
};
return Some(match mutbl {
chalk_ir::Mutability::Not => write!(fmt, "(&{:?} {:?})", lifetime, ty),
chalk_ir::Mutability::Mut => write!(fmt, "(&{:?} mut {:?})", lifetime, ty),
});
}
chalk_ir::TypeName::Array => {
let data = application_ty.substitution.interned();
let ty = match &**data[0].interned() {
chalk_ir::GenericArgData::Ty(t) => t,
_ => unreachable!(),
};
let len = match &**data[1].interned() {
chalk_ir::GenericArgData::Const(t) => t,
_ => unreachable!(),
};
return Some(write!(fmt, "[{:?}; {:?}]", ty, len));
}
chalk_ir::TypeName::Slice => {
let data = application_ty.substitution.interned();
let ty = match &**data[0].interned() {
chalk_ir::GenericArgData::Ty(t) => t,
_ => unreachable!(),
};
return Some(write!(fmt, "[{:?}]", ty));
}
_ => {}
}
let chalk_ir::ApplicationTy { name, substitution } = application_ty;
Some(write!(fmt, "{:?}{:?}", name, chalk_ir::debug::Angle(substitution.interned())))
}