tree bbfaf3093c4a894726e09107b8d385225c40795e
parent 85ed21e83c9f42203cfe06d41eab3f160bd13518
parent 4d537141835f825892e2be868620e98585b3d4a9
author bors <bors@rust-lang.org> 1561352410 +0000
committer bors <bors@rust-lang.org> 1561352410 +0000

Auto merge of #62075 - Centril:guardless-match-arms, r=petrochenkov

Remove `ast::Guard`

With the introduction of `ast::ExprKind::Let` in https://github.com/rust-lang/rust/pull/60861, the `ast::Guard` structure is now redundant in terms of representing [`if let` guards](https://github.com/rust-lang/rust/issues/51114) in AST since it can be represented by `ExprKind::Let` syntactically. Therefore, we remove `ast::Guard` here.

However, we keep `hir::Guard` because the semantic representation is a different matter and this story is more unclear right now (might involve `goto 'arm` in HIR or something...).

r? @petrochenkov