[gcc/devel/rust/master] Merge #1241

[Thomas Schwinge <tschwinge@gcc.gnu.org>]

https://gcc.gnu.org/g:63762cc243c643c10aca7e07dfd6abe9b78748f8

commit 63762cc243c643c10aca7e07dfd6abe9b78748f8
Merge: c7008d3e254 a91b138bbc2
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Mon May 23 14:28:23 2022 +0000

    Merge #1241
    
    1241: Implement name resolution for the IfLet expression. r=philberty a=antego
    
    Addresses #1177.
    
    Guidance from the ticket #1177:
    
    > You should be able to copy how we do name resolution for the if blocks from that file. Though if let statements add a new binding and scope level so you need to declare the pattern so you should be able to see how that is done from rust-ast-resolve-stmt.
    
    I don't understand how to modify the block expression resolution so that it can handle the `IfLet` expression. For now, I copied the code from the `MatchExpr` resolution. Not sure how to test it either and what is the desired expected result of the name resolution so I just hope that reviewers will spot the errors.
    
    I created this PR in order to get some guidance about how to proceed with it. Thanks!
    
    
    
    Co-authored-by: antego <antego@users.noreply.github.com>

Diff:

 gcc/rust/resolve/rust-ast-resolve-expr.cc | 25 +++++++++++++++++++++++++
 gcc/rust/resolve/rust-ast-resolve-expr.h  |  2 ++
 2 files changed, 27 insertions(+)