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Auto merge of #78779 - LeSeulArtichaut:ty-visitor-return, r=oli-obk

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Introduce `TypeVisitor::BreakTy`

Implements MCP rust-lang/compiler-team#383.
r? `@ghost`
cc `@lcnr` `@oli-obk`

~~Blocked on FCP in rust-lang/compiler-team#383.~~
This commit is contained in:
bors 2020-11-17 12:24:34 +00:00
commit e0ef0fc392
32 changed files with 232 additions and 213 deletions
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2
compiler/rustc_macros/src/type_foldable.rs
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@ -35,7 +35,7 @@ pub fn type_foldable_derive(mut s: synstructure::Structure<'_>) -> proc_macro2::
fn super_visit_with<__F: ::rustc_middle::ty::fold::TypeVisitor<'tcx>>(
&self,
__folder: &mut __F
) -> ::std::ops::ControlFlow<()> {
) -> ::std::ops::ControlFlow<__F::BreakTy> {
match *self { #body_visit }
::std::ops::ControlFlow::CONTINUE
}