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| author | Nathaniel Shead <nathanieloshead@gmail.com> | 2024-12-16 16:06:05 +1100 |
|---|---|---|
| committer | Nathaniel Shead <nathanieloshead@gmail.com> | 2025-01-23 17:38:07 +1100 |
| commit | 685c458fb4775cbd1a3b3d3585d1e5615d7eaee9 (patch) | |
| tree | 8e3f153e1f302a197d028219eef7115065e13e2d /gcc/doc/invoke.texi | |
| parent | 21cccfa91e6ed172062e0c62682422269c914937 (diff) | |
| download | gcc-685c458fb4775cbd1a3b3d3585d1e5615d7eaee9.zip gcc-685c458fb4775cbd1a3b3d3585d1e5615d7eaee9.tar.gz gcc-685c458fb4775cbd1a3b3d3585d1e5615d7eaee9.tar.bz2 | |
c++: Fix mangling of lambdas in static data member initializers [PR107741]
This fixes an issue where lambdas declared in the initializer of a
static data member within the class body do not get a mangling scope of
that variable; this results in mangled names that do not conform to the
ABI spec.
To do this, the patch splits up grokfield for this case specifically,
allowing a declaration to be build and used in start_lambda_scope before
parsing the initializer, so that record_lambda_scope works correctly.
As a drive-by, this also fixes the issue of a static member not being
visible within its own initializer.
PR c++/107741
gcc/c-family/ChangeLog:
* c-opts.cc (c_common_post_options): Bump ABI version.
gcc/ChangeLog:
* common.opt: Add -fabi-version=20.
* doc/invoke.texi: Likewise.
gcc/cp/ChangeLog:
* cp-tree.h (start_initialized_static_member): Declare.
(finish_initialized_static_member): Declare.
* decl2.cc (start_initialized_static_member): New function.
(finish_initialized_static_member): New function.
* lambda.cc (record_lambda_scope): Support falling back to old
ABI (maybe with warning).
* parser.cc (cp_parser_member_declaration): Build decl early
when parsing an initialized static data member.
gcc/testsuite/ChangeLog:
* g++.dg/abi/macro0.C: Bump ABI version.
* g++.dg/abi/mangle74.C: Remove XFAILs.
* g++.dg/other/fold1.C: Restore originally raised error.
* g++.dg/abi/lambda-ctx2-19.C: New test.
* g++.dg/abi/lambda-ctx2-19vs20.C: New test.
* g++.dg/abi/lambda-ctx2-20.C: New test.
* g++.dg/abi/lambda-ctx2.h: New test.
* g++.dg/cpp0x/static-member-init-1.C: New test.
Signed-off-by: Nathaniel Shead <nathanieloshead@gmail.com>
Diffstat (limited to 'gcc/doc/invoke.texi')
| -rw-r--r-- | gcc/doc/invoke.texi | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 75fbe88..2f5d60b 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -3020,6 +3020,9 @@ that have additional context. Version 19, which first appeard in G++ 14, fixes manglings of structured bindings to include ABI tags. +Version 20, which first appeared in G++ 15, fixes manglings of lambdas +in static data member initializers. + See also @option{-Wabi}. @opindex fabi-compat-version |