[gcc/devel/rust/master] Merge #1611

[gcc/devel/rust/master] Merge #1611

[Thomas Schwinge]

https://gcc.gnu.org/g:e39fadcd0aa4d52d53667e2adad9a6677f7e9adf

commit e39fadcd0aa4d52d53667e2adad9a6677f7e9adf
Merge: 22329b03a6e 3053ec36609
Author: bors[bot] <26634292+bors[bot]@users.noreply.github.com>
Date:   Sun Dec 4 22:02:22 2022 +0000

    Merge #1611
    
    1611: Initial state capture for closures r=philberty a=philberty
    
    This patch set adds the initial support closure captures, move semantics are not
    handled here. We track what variables are being captured by a closure during
    name resolution so that when a VAR_DECL is resolved, we check if we are inside
    a closure context node_id which is the same id as its associated rib id. So when
    we resolve a name that resides in an outermost rib we can add this to set of
    node-id's that are captured by this closure.
    
    There is a gap here for the case where we need to check if it is inside a nested
    function and that function contains closures which could wrongly capture variables
    in the enclosing function. This will also be a problem for nested functions in general.
    
    Fixes #195
    
    Co-authored-by: Philip Herron <philip.herron@embecosm.com>

Diff:

 gcc/rust/backend/rust-compile-context.cc       |  47 +++++
 gcc/rust/backend/rust-compile-context.h        |   9 +
 gcc/rust/backend/rust-compile-expr.cc          |  50 ++++-
 gcc/rust/backend/rust-compile-resolve-path.cc  |   8 +
 gcc/rust/backend/rust-compile-type.cc          |  31 +++-
 gcc/rust/resolve/rust-ast-resolve-expr.cc      |  23 ++-
 gcc/rust/resolve/rust-ast-resolve-implitem.h   |  12 +-
 gcc/rust/resolve/rust-ast-resolve-item.cc      |  19 +-
 gcc/rust/resolve/rust-ast-resolve-pattern.cc   |   2 +-
 gcc/rust/resolve/rust-ast-resolve-pattern.h    |  12 +-
 gcc/rust/resolve/rust-ast-resolve-stmt.h       |  19 +-
 gcc/rust/resolve/rust-ast-resolve-toplevel.h   |  21 ++-
 gcc/rust/resolve/rust-ast-resolve-type.h       |   2 +-
 gcc/rust/resolve/rust-name-resolver.cc         | 241 ++++++++++++++++++++-----
 gcc/rust/resolve/rust-name-resolver.h          |  49 ++++-
 gcc/rust/typecheck/rust-hir-type-check-expr.cc |   4 +-
 gcc/rust/typecheck/rust-tyty.cc                |   5 +-
 gcc/rust/typecheck/rust-tyty.h                 |  11 +-
 gcc/testsuite/rust/execute/torture/closure3.rs |  33 ++++
 19 files changed, 498 insertions(+), 100 deletions(-)