[gcc/devel/rust/master] Merge #1290 #1291 #1294

[gcc/devel/rust/master] Merge #1290 #1291 #1294

[Thomas Schwinge]

https://gcc.gnu.org/g:957914b4284213b1d72c9c4210892367acaf1419

commit 957914b4284213b1d72c9c4210892367acaf1419
Merge: 664bd46f4cf fb2fc585fdc a89eb96d79e 8d1f5f99484
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Fri Jun 3 09:29:34 2022 +0000

    Merge #1290 #1291 #1294
    
    1290: Reformat copyright header in rust-parse-impl.h r=philberty a=philberty
    
    
    
    1291: Fix bad impl item overlap check r=philberty a=philberty
    
    This issue here was the equality checks for reference
    and pointer types did not check the mutability.
    
    Fixes #1289
    
    1294: Add new mappings for items within a module r=philberty a=philberty
    
    This patch adds two new interfaces to the mappings class.
    
      - Lookup the child items within a module
      - Lookup the parent module id from the child item id
    
    Each of these API's are going to be required so that we can resolve two new
    types of path segment:
    
      super::foo::bar
    
    Where we need to be able to lookup the super module node id from the
    current scope node id. To then lookup the children within that scope. The
    other path is simpler such as: crate::foo::bar. Where we lookup the items
    within the current Crate NodeId and follow on as normal.
    
    Addresses #1227
    
    Co-authored-by: Philip Herron <philip.herron@embecosm.com>

Diff:

 gcc/rust/parse/rust-parse-impl.h             | 26 +++++++++--------
 gcc/rust/resolve/rust-ast-resolve-toplevel.h | 13 +++++++++
 gcc/rust/typecheck/rust-tyty.cc              |  6 ++++
 gcc/rust/util/rust-hir-map.cc                | 41 +++++++++++++++++++++++++++
 gcc/rust/util/rust-hir-map.h                 | 10 +++++++
 gcc/rust/util/rust-lang-item.h               |  7 +++++
 gcc/testsuite/rust/compile/issue-1289.rs     | 42 ++++++++++++++++++++++++++++
 7 files changed, 133 insertions(+), 12 deletions(-)