================
@@ -0,0 +1,270 @@
+// RUN: %clang_cc1 -std=c++98 -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected
+// RUN: %clang_cc1 -std=c++11 -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected,since-cxx11
+// RUN: %clang_cc1 -std=c++14 -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected,since-cxx11
+// RUN: %clang_cc1 -std=c++17 -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected,since-cxx11
+// RUN: %clang_cc1 -std=c++20 -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected,since-cxx11,since-cxx20
+// RUN: %clang_cc1 -std=c++23 -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected,since-cxx11,since-cxx20
+// RUN: %clang_cc1 -std=c++2c -fexceptions -fcxx-exceptions -pedantic-errors
%s -verify-directives -verify=expected,since-cxx11,since-cxx20
+
+namespace cwg3088 { // cwg3088: partial
+#define asm
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define auto
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define bool
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define break
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define case
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define catch
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define char
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define class
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define const
+// FIXME-error@-1 {{keyword is hidden by macro definition}}
+#define const_cast
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define continue
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define default
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define delete
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define do
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define double
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define dynamic_cast
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define else
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define enum
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define explicit
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define export
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define extern
+// FIXME-error@-1 {{keyword is hidden by macro definition}}
+#define false
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define float
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define for
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define friend
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define goto
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define if
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define inline
+// FIXME-error@-1 {{keyword is hidden by macro definition}}
+#define int
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define long
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define mutable
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define namespace
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define new
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define operator
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define private
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define protected
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define public
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define register
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define reinterpret_cast
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define return
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define short
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define signed
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define sizeof
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define static
+// FIXME-error@-1 {{keyword is hidden by macro definition}}
+#define static_cast
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define struct
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define switch
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define template
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define this
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define throw
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define true
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define try
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define typedef
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define typeid
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define typename
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define union
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define unsigned
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define using
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define virtual
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define void
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define volatile
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define wchar_t
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define while
+// expected-error@-1 {{keyword is hidden by macro definition}}
+#define and
----------------
AaronBallman wrote:
Good catch! https://eel.is/c++draft/cpp.scope#2 also makes that more clear. So
no tests needed for `#undef` -- also, C++ requires the C header contents to be
different from what they are in C (I always forget this):
https://eel.is/c++draft/iso646.h.syn#header:%3ciso646.h%3e
https://github.com/llvm/llvm-project/pull/189309
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