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Aleksandr Platonov 8bd00557e3 [clang][parser] Allow GNU attributes before namespace identifier 
GCC supports:
- `namespace <gnu attributes> identifier`
- `namespace identifier <gnu attributes>`

But clang supports only `namespace identifier <gnu attributes>` and diagnostics for `namespace <gnu attributes> identifier` case looks unclear:
Code:
```
namespace __attribute__((visibility("hidden"))) A
{
}
```
Diags:
```
test.cpp:1:49: error: expected identifier or '{'
namespace __attribute__((visibility("hidden"))) A
                                                ^
test.cpp:1:49: error: C++ requires a type specifier for all declarations
test.cpp:3:2: error: expected ';' after top level declarator
}
```

This patch adds support for `namespace <gnu attributes> identifier` and also forbids gnu attributes for nested namespaces (this already done for C++ attributes).

Reviewed By: aaron.ballman

Differential Revision: https://reviews.llvm.org/D121245
2022-03-15 22:30:22 +03:00
..
access-spec-attrs.cpp
…
altivec-bool-128.c
[PowerPC] Disable vector types when not supported by subtarget features
2021-10-04 14:16:47 -05:00
altivec-csk-bool.c
…
altivec-non-type-vector.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
altivec-template-vector.cpp
When vector is found as a type or non-type id, check if it is really the altivec vector token.
2021-05-20 12:39:04 -04:00
altivec-typedef-vector.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
altivec-zvector-bool.c
Parse vector bool when stdbool.h and altivec.h are included
2021-05-13 11:48:32 -04:00
altivec.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
annotation-token-in-lexed-body.cpp
…
argument_qualified.c
…
argument_redef.c
…
argument_scope.c
…
arm-windows-calling-convention-handling.c
…
asm-constraints-pr7869.c
…
asm-goto.c
…
asm-goto.cpp
…
asm-qualifiers.c
…
asm.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
asm.cpp
…
atomic.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
attr-availability-xcore.c
…
attr-availability.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
attr-external-source-symbol-cxx11.cpp
…
attr-external-source-symbol.m
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
attr-order.cpp
Ignore unknown attribute warnings in this test
2021-01-27 15:45:35 -05:00
attributes.c
Add -Wno-strict-prototypes to C tests; NFC
2022-02-24 15:30:30 -05:00
attributes.mm
…
backtrack-crash.cpp
…
backtrack-off-by-one.cpp
…
bad-control.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
block-block-storageclass.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
block-pointer-decl.c
…
bracket-crash.cpp
…
brackets.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
brackets.cpp
…
builtin_classify_type.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
builtin_source_location.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
builtin_types_compatible.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
c1x-alignas.c
…
c1x-generic-selection.c
…
c2x-attributes.c
Add -Wno-strict-prototypes to C tests; NFC
2022-02-24 15:30:30 -05:00
c2x-attributes.m
…
c11-noreturn.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
c99.c
…
c-namespace.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
captured-statements.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
char-literal-printing.c
…
check_cast.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
check-objc2-syntax-1.m
…
check-syntax-1.m
…
colon-colon-parentheses.cpp
…
completely-empty-header-file.h
…
compound_literal.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
compound-token-split.cpp
…
CompoundStmtScope.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
control-scope.c
…
crash-report.c
…
cuda-check-input-kind-assoc.cuh
…
cuda-force-host-device-templates.cu
…
cuda-force-host-device.cu
…
cuda-kernel-call-c++11.cu
…
cuda-kernel-call.cu
Fix comments in test cuda-kernel-call.cu
2021-06-02 10:21:26 -04:00
cxx0x-ambig.cpp
Diagnose -Wunused-value based on CFG reachability
2021-09-28 10:00:15 -07:00
cxx0x-attributes.cpp
Allow parameter pack expansions and initializer lists in annotate attribute
2022-02-08 13:38:07 -05:00
cxx0x-condition.cpp
…
cxx0x-decl.cpp
…
cxx0x-for-range.cpp
…
cxx0x-in-cxx98.cpp
…
cxx0x-lambda-expressions.cpp
[clang] [C++2b] [P1102] Accept lambdas without parameter list ().
2021-03-24 14:42:27 +01:00
cxx0x-literal-operators.cpp
…
cxx0x-member-initializers.cpp
…
cxx0x-override-control-keywords.cpp
…
cxx0x-rvalue-reference.cpp
…
cxx1z-attributes.cpp
…
cxx1z-class-template-argument-deduction.cpp
Fix crash on invalid code involving late parsed inline methods
2021-12-16 07:58:51 -05:00
cxx1z-constexpr-lambdas.cpp
[clang] [C++2b] [P1102] Accept lambdas without parameter list ().
2021-03-24 14:42:27 +01:00
cxx1z-coroutines.cpp
…
cxx1z-decomposition.cpp
…
cxx1z-fold-expressions.cpp
…
cxx1z-init-statement.cpp
Diagnose -Wunused-value based on CFG reachability
2021-09-28 10:00:15 -07:00
cxx1z-nested-namespace-definition.cpp
…
cxx1z-using-declaration.cpp
…
cxx2a-abbreviated-templates.cpp
…
cxx2a-bitfield-init.cpp
…
cxx2a-concept-declaration.cpp
Update the message for template-template param keyword for C++17
2021-09-28 06:02:29 -07:00
cxx2a-concepts-requires-expr.cpp
Fix a failed assertion on an invalid typename requirement
2022-01-18 11:59:08 -05:00
cxx2a-constrained-template-param-with-partial-id.cpp
…
cxx2a-constrained-template-param.cpp
…
cxx2a-designated-init.cpp
…
cxx2a-init-statement.cpp
[clang] Fix ternary operator in the second for loop statement
2021-05-16 10:42:52 -07:00
cxx2a-inline-nested-namespace-definition.cpp
…
cxx2a-placeholder-type-constraint.cpp
[clang] Fix constrained decltype(auto) deduction
2021-03-05 18:20:09 -08:00
cxx2a-spaceship.cpp
…
cxx2a-template-lambdas.cpp
[clang] [PR49736] [C++2b] Correctly reject lambdas with requires clause and no parameter list
2021-03-30 13:53:55 +02:00
cxx2b-auto-x.cpp
[c++2b] Implement P0849R8 auto(x)
2022-02-28 19:21:08 -06:00
cxx2b-init-statement.cpp
Extend init-statement to allow alias-declaration
2021-10-08 07:13:45 -04:00
cxx2b-lambdas.cpp
[clang] [PR49736] [C++2b] Correctly reject lambdas with requires clause and no parameter list
2021-03-30 13:53:55 +02:00
cxx2b-subscript.cpp
[C++2b] Implement multidimentional subscript operator
2022-02-08 12:10:47 -05:00
cxx11-base-spec-attributes.cpp
…
cxx11-brace-initializers.cpp
…
cxx11-stmt-attributes.cpp
…
cxx11-templates.cpp
…
cxx11-type-specifier.cpp
…
cxx11-user-defined-literals.cpp
Implement delimited escape sequences.
2021-09-15 09:54:49 -04:00
cxx98-enum.cpp
…
cxx-altivec-bool-128.cpp
[PowerPC] Disable vector types when not supported by subtarget features
2021-10-04 14:16:47 -05:00
cxx-altivec.cpp
[PowerPC] Disable vector types when not supported by subtarget features
2021-10-04 14:16:47 -05:00
cxx-ambig-decl-expr-xfail.cpp
…
cxx-ambig-decl-expr.cpp
Diagnose -Wunused-value based on CFG reachability
2021-09-28 10:00:15 -07:00
cxx-ambig-init-templ.cpp
…
cxx-ambig-paren-expr-asan.cpp
…
cxx-ambig-paren-expr.cpp
…
cxx-attributes.cpp
[Parser] Fix attr infloop on "int x [[c"
2021-08-10 15:03:08 +02:00
cxx-bool.cpp
…
cxx-casting.cpp
…
cxx-class-template-specialization.cpp
…
cxx-class.cpp
…
cxx-concept-declaration.cpp
…
cxx-concepts-ambig-constraint-expr.cpp
…
cxx-concepts-requires-clause.cpp
[clang] [PR49736] [C++2b] Correctly reject lambdas with requires clause and no parameter list
2021-03-30 13:53:55 +02:00
cxx-condition.cpp
…
cxx-decl.cpp
…
cxx-default-args.cpp
…
cxx-default-delete.cpp
…
cxx-ext-delete-default.cpp
…
cxx-extern-c-array.cpp
…
cxx-extra-semi.cpp
…
cxx-extra-virtual-specifiers.cpp
[Parse] Improve diagnostic and recovery when there is an extra override in the outline method definition.
2021-10-18 10:00:21 +02:00
cxx-friend.cpp
…
cxx-in-c.c
…
cxx-invalid-for-range.cpp
…
cxx-invalid-function-decl.cpp
…
cxx-keyword-identifiers.cpp
[clang] Fix crash on broken parameter declarators
2021-11-26 10:56:54 +01:00
cxx-member-crash.cpp
…
cxx-member-init-missing-paren-crash.cpp
…
cxx-member-initializers.cpp
…
cxx-modules-interface.cppm
[NFC] Format .cppm files in tests
2021-12-13 23:32:25 +08:00
cxx-namespace-alias.cpp
…
cxx-reference.cpp
…
cxx-stmt.cpp
…
cxx-template-argument.cpp
[clang] Stop providing builtin overload candidate for relational function pointer comparisons
2021-06-26 00:08:02 +02:00
cxx-template-decl.cpp
Update the message for template-template param keyword for C++17
2021-09-28 06:02:29 -07:00
cxx-throw.cpp
…
cxx-typeid.cpp
…
cxx-typeof.cpp
…
cxx-undeclared-identifier.cpp
…
cxx-using-declaration.cpp
…
cxx-using-directive.cpp
…
cxx-variadic-func.cpp
…
debugger-import-module.m
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
declarators.c
…
declspec-recovery.c
…
declspec-supported.c
…
decomposed-condition.cpp
…
DelayedTemplateParsing.cpp
…
designator.c
…
diag-crash.c
…
editor-placeholder-recovery.cpp
…
empty-translation-unit.c
…
encode.m
…
enhanced-proto-1.m
…
eof2.cpp
…
eof.cpp
…
explicit-bool.cpp
…
expressions.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
expressions.cpp
…
expressions.m
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
ext-int.cpp
Introduce _BitInt, deprecate _ExtInt
2021-12-06 12:52:01 -05:00
extension.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
extra-semi-resulting-in-nullstmt-in-init-statement.cpp
…
extra-semi-resulting-in-nullstmt.cpp
[NFC][clang] Fix comments.
2022-01-05 14:49:03 +08:00
extra-semi.cpp
…
for.cpp
…
fp-floatcontrol-syntax.cpp
Allow #pragma float_control(push|pop) within a language linkage specification
2021-07-28 07:37:56 -04:00
function-decls.c
…
gcc-__final-compatibility.cpp
…
gcc-for-loop-init-compatibility.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
goto.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
if-scope-c90.c
…
if-scope-c99.c
…
implicit-casts.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
knr_parameter_attributes.c
…
lambda-attr.cu
[CUDA][NFC] Fix inexact warning message about lambdas
2021-10-27 01:28:35 +00:00
lambda-misplaced-capture-default.cpp
…
matrix-type-disabled.c
…
max-tokens.cpp
…
message-expr-alt-op.mm
…
method-def-in-class.m
…
method-prototype-1.m
…
MicrosoftExtensions.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
MicrosoftExtensions.cpp
[clang] Fix for "Bug 27113 - MSVC-compat __identifier implementation incomplete"
2021-05-21 11:14:01 +02:00
MicrosoftExtensionsInlineAsm.c
…
missing-closing-rbrace.m
…
missing-end-2.m
…
missing-end-3.m
…
missing-end-4.m
…
missing-end.m
…
missing-selector-name.mm
…
ms-anachronism.c
…
ms-if-exists.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
ms-if-exists.cpp
…
ms-inline-asm-nested-braces.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
ms-inline-asm.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
ms-seh.c
Use functions with prototypes when appropriate; NFC
2022-02-07 15:29:36 -05:00
ms-square-bracket-attributes.mm
…
namelookup-bug-1.c
…
namelookup-bug-2.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
namespace-alias-attr.cpp
…
namespace-attributes.cpp
[clang][parser] Allow GNU attributes before namespace identifier
2022-03-15 22:30:22 +03:00
namespaces.cpp
…
nested_blocks_overflow.cpp
…
nested_function_prototype_overflow.cpp
…
nested_lambda_overflow.cpp
…
no-gnu-inline-asm.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
nullability.c
…
objc-alias-printing.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-at-directive-fixit.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-at-implementation-eof-crash.m
…
objc-at-interface-eof-crash.m
…
objc-attr.m
…
objc-available.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-boxing.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-category-neg-1.m
…
objc-class-property.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-cxx-keyword-identifiers.mm
…
objc-diag-width.mm
…
objc-error-qualified-implementation.m
…
objc-forcollection-1.m
…
objc-forcollection-neg-2.m
…
objc-forcollection-neg.m
…
objc-foreach-syntax.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-implementation-attrs.m
[Clang] always_inline statement attribute
2022-03-14 21:45:31 +01:00
objc-init.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-interfaces.m
…
objc-messaging-1.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-messaging-neg-1.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-missing-impl.m
…
objc-property-syntax.m
…
objc-quirks.m
…
objc-recover.mm
…
objc-static-assert.m
…
objc-static-assert.mm
…
objc-synthesized-recover.m
…
objc-try-catch-1.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objc-type-printing.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
objcbridge-related-attribute.m
…
objcxx0x-lambda-expressions.mm
…
objcxx11-attributes.mm
Diagnose -Wunused-value based on CFG reachability
2021-09-28 10:00:15 -07:00
objcxx11-initialized-temps.mm
…
objcxx11-invalid-lambda.cpp
…
objcxx11-messaging-and-lambda.mm
…
objcxx11-protocol-in-template.mm
…
objcxx11-user-defined-literal.mm
…
objcxx14-protocol-in-template.mm
…
objcxx-at.mm
…
objcxx-enum.mm
…
objcxx-lambda-expressions-neg.mm
…
offsetof.c
…
opencl-astype.cl
…
opencl-atomics-cl20.cl
[OpenCL] Change default standard version to CL1.2
2021-07-26 15:04:34 +01:00
opencl-cl20.cl
[OpenCL] Change default standard version to CL1.2
2021-07-26 15:04:34 +01:00
opencl-cxx-keywords.cl
…
opencl-cxx-virtual.cl
[OpenCL] Add clang extension for function pointers.
2021-01-06 20:39:57 +00:00
opencl-image-access.cl
…
opencl-kernel.cl
…
opencl-keywords.cl
…
opencl-pragma.cl
…
opencl-storage-class.cl
[OpenCL] Change default standard version to CL1.2
2021-07-26 15:04:34 +01:00
opencl-unroll-hint.cl
Treat opencl_unroll_hint subject errors as semantic rather than parse errors
2021-02-05 07:20:41 -05:00
p10-vector-bool-128.c
…
parenthesis-balance.cpp
…
parmvardecl_conversion.c
…
parser_overflow.c
…
placeholder-recovery.m
…
pointer_promotion.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
pointer-arithmetic.c
…
PR11000.cpp
…
PR21872.cpp
…
pragma-attribute-context.cpp
…
pragma-attribute-declspec.cpp
…
pragma-attribute.cpp
Improve docs & test for #pragma clang attribute's any clause; NFC
2021-11-17 08:24:26 -05:00
pragma-fenv_access-ms.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
pragma-fenv_access.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
pragma-fenv_round.c
…
pragma-fp-contract.c
…
pragma-fp-contract.cpp
…
pragma-fp-warn.c
…
pragma-fp.cpp
…
pragma-loop-safety.cpp
…
pragma-loop.cpp
[SVE] Add support to vectorize_width loop pragma for scalable vectors
2021-01-08 11:37:27 +00:00
pragma-optimize-diagnostics.cpp
…
pragma-options.c
…
pragma-options.cpp
…
pragma-pack.c
…
pragma-pipeline.cpp
…
pragma-unroll-and-jam.cpp
…
pragma-unroll.cpp
…
pragma-visibility2.c
[test] Add {{.*}} to make ELF tests immune to dso_local/dso_preemptable/(none) differences
2020-12-31 00:27:11 -08:00
pragma-visibility.c
…
pragma-weak.c
…
promote_types_in_proto.c
…
recovery.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
recovery.cpp
…
recovery.m
…
recursion-limits.cpp
…
selector-1.m
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
sizeof-missing-parens.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
skip-function-bodies.h
…
skip-function-bodies.mm
…
slh-asm-goto-no-warn.cpp
…
slh-asm-goto.cpp
…
statements.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
static_assert.c
Update diagnostic groups for pre-compat warnings
2021-03-17 07:52:34 -04:00
stmt-attributes.c
[Clang] noinline stmt attribute - emit warnings rather than errors
2022-03-14 23:40:17 +01:00
stmt-attributes.cpp
[Attr] Apply GNU-style attributes to expression statements
2021-02-11 16:44:41 +03:00
stmt-attributes.m
[clang] inheritance fix for nomerge attribute
2022-02-11 15:51:08 +01:00
struct-recursion.c
…
switch-recovery.cpp
…
switch-typo-correction.cpp
…
top-level-semi-cxx0x.cpp
…
traditional_arg_scope.c
…
typeof.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
types.c
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
using-if-exists-attr.cpp
[clang] Implement the using_if_exists attribute
2021-06-02 10:30:24 -04:00
using-template.cpp
…
vector-cast-define.cl
…
vsx.c
…
warn-cuda-compat.cu
…
warn-dangling-else.cpp
…
warn-misleading-indentation-fix.cpp
…
warn-misleading-indentation.cpp
Use functions with prototypes when appropriate; NFC
2022-02-09 09:11:49 -05:00
warn-semicolon-before-method-body.m
…
x64-windows-calling-convention-handling.c
…