[gcc/devel/rust/master] Merge #1111

[gcc/devel/rust/master] Merge #1111

[Thomas Schwinge]

https://gcc.gnu.org/g:497ee70b776574aa3559c7d49a5cc7cf359d320e

commit 497ee70b776574aa3559c7d49a5cc7cf359d320e
Merge: c1639be8bb0 03cb435c190
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Wed Apr 13 10:41:12 2022 +0000

    Merge #1111
    
    1111: Add AST Private Visibilities r=CohenArthur a=CohenArthur
    
    When parsing a visibility in `parse_visibility`, it is not an error to
    not have a pub token: It simply means we want to create a private
    visibility. If we had C++14 or another language, we could instead
    represent all visibilities as an optional<AST::Visibility> where the
    Visibility class would not need to change. But I think the best course
    of action for our case is to instead keep visibilities even when they
    are private and have a special case in the `VisKind` enumeration.
    
    This also enables HIR lowering of visibilities to be performed properly for private items
    
    Co-authored-by: Arthur Cohen <arthur.cohen@embecosm.com>

Diff:

 gcc/rust/ast/rust-ast-full-test.cc | 14 ++++++-----
 gcc/rust/ast/rust-item.h           | 51 ++++++++++++++++++++++----------------
 gcc/rust/hir/rust-ast-lower.cc     | 15 +++++------
 gcc/rust/parse/rust-parse-impl.h   |  2 +-
 4 files changed, 45 insertions(+), 37 deletions(-)