[gcc/devel/rust/master] Merge #1735

[gcc/devel/rust/master] Merge #1735

[Thomas Schwinge]

https://gcc.gnu.org/g:d7c321da9f8fdee4527285c782db57c7c4d520e4

commit d7c321da9f8fdee4527285c782db57c7c4d520e4
Merge: 0ae13efb5a6 3630e0e2bf0
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Mon Jan 30 12:44:25 2023 +0000

    Merge #1735
    
    1735: macro: Allow builtin `MacroInvocation`s within the AST r=CohenArthur a=CohenArthur
    
    gcc/rust/ChangeLog:
    
            * ast/rust-macro.h (enum class): Add `BuiltinMacro` enum class
            * expand/rust-attribute-visitor.cc (AttrVisitor::visit): Mention switching on `macro.kind` once builtin macro invocations are properly handled
            * parse/rust-parse-impl.h (Parser::parse_macro_invocation): Switch to new MacroInvocation API
            (Parser::parse_type): Switch to new MacroInvocation API
            (Parser::parse_type_no_bounds): Switch to new MacroInvocation API
    
    This will be necessary for proper handling of builtin macros with the new `EarlyNameResolver` class and associated fixed-point algorithm
    
    Co-authored-by: Arthur Cohen <arthur.cohen@embecosm.com>

Diff:

 gcc/rust/ast/rust-macro.h                 | 110 +++++++++++++++++++++++++-----
 gcc/rust/expand/rust-attribute-visitor.cc |   2 +
 gcc/rust/parse/rust-parse-impl.h          |  70 +++++++++----------
 3 files changed, 126 insertions(+), 56 deletions(-)