[gcc/devel/rust/master] Merge #1191

[gcc/devel/rust/master] Merge #1191

[Thomas Schwinge]

https://gcc.gnu.org/g:fb136314f9584744ccc7b09ace3cea99129b7cf4

commit fb136314f9584744ccc7b09ace3cea99129b7cf4
Merge: 27e562a2c07 98e1de2d8fd
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Mon May 2 14:32:12 2022 +0000

    Merge #1191
    
    1191: Resolve simple paths in use items r=CohenArthur a=CohenArthur
    
    In order to resolve `SimplePath`s, we have to expand all paths present
    in a `UseDeclaration` and resolve them. For example, we want to resolve
    two paths with the following statement `use foo::bar::{baz, bul}`:
    `foo::bar::baz` and `foo::bar::bul`
    This also removes the prelude inclusion (`use std::prelude::v1::*`)
    since we cannot resolve it (yet!)
    
    Needs #1172 to compile
    Adresses #1159
    Adresses #1187
    
    Co-authored-by: Arthur Cohen <arthur.cohen@embecosm.com>

Diff:

 gcc/rust/ast/rust-ast.h                        |   2 +
 gcc/rust/ast/rust-item.h                       |  57 +++++
 gcc/rust/resolve/rust-ast-resolve-item.cc      | 297 ++++++++++++++++++++++++-
 gcc/rust/resolve/rust-ast-resolve-item.h       |  11 +
 gcc/rust/resolve/rust-ast-resolve-type.cc      |  47 ++++
 gcc/rust/resolve/rust-ast-resolve-type.h       |  55 +----
 gcc/rust/rust-lang.cc                          |   2 +
 gcc/rust/rust-session-manager.cc               |  36 +--
 gcc/testsuite/rust/compile/torture/cfg_attr.rs |   2 +-
 gcc/testsuite/rust/compile/use_1.rs            |  16 ++
 10 files changed, 455 insertions(+), 70 deletions(-)