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snippet/c++defs: fix real-floating arg functions in C++ mode

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Also, define isfinite, isinf, isnan, signbit in the gnulib
namespace instead of in the global namespace.
* build-aux/snippet/c++defs.h (_GL_BEGIN_NAMESPACE)
(_GL_END_NAMESPACE): New.
* lib/math.in.h (_GL_MATH_CXX_REAL_FLOATING_DECL_2): Use them.
(isfinite, isinf, isnan, signbit) [__cplusplus &&
GNULIB_NAMESPACE]: Define them in the GNULIB_NAMESPACE namespace
instead of in the global namespace.
* tests/test-math-c++.cc: Check that the isfinite, isinf, isnan,
signbit overloads exist in the GNULIB_NAMESPACE namespace, instead
of in the global namespace.
This commit is contained in:
Pedro Alves
2016-11-14 23:08:21 +00:00
committed by Paul Eggert
parent c3b131294a
commit c907efdb07
4 changed files with 34 additions and 7 deletions
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15
ChangeLog
View File

@@ -1,3 +1,18 @@
2016-11-14 Pedro Alves <palves@redhat.com>
snippet/c++defs: fix real-floating arg functions in C++ mode
Also, define isfinite, isinf, isnan, signbit in the gnulib
namespace instead of in the global namespace.
* build-aux/snippet/c++defs.h (_GL_BEGIN_NAMESPACE)
(_GL_END_NAMESPACE): New.
* lib/math.in.h (_GL_MATH_CXX_REAL_FLOATING_DECL_2): Use them.
(isfinite, isinf, isnan, signbit) [__cplusplus &&
GNULIB_NAMESPACE]: Define them in the GNULIB_NAMESPACE namespace
instead of in the global namespace.
* tests/test-math-c++.cc: Check that the isfinite, isinf, isnan,
signbit overloads exist in the GNULIB_NAMESPACE namespace, instead
of in the global namespace.
2016-11-13 Jim Meyering <meyering@fb.com>
strftime: don't use __THROW

9
build-aux/snippet/c++defs.h
View File

@@ -17,6 +17,15 @@
#ifndef _GL_CXXDEFS_H
#define _GL_CXXDEFS_H
/* Begin/end the GNULIB_NAMESPACE namespace. */
#if defined __cplusplus && defined GNULIB_NAMESPACE
# define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE {
# define _GL_END_NAMESPACE }
#else
# define _GL_BEGIN_NAMESPACE
# define _GL_END_NAMESPACE
#endif
/* The three most frequent use cases of these macros are:
* For providing a substitute for a function that is missing on some

12
lib/math.in.h
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@@ -63,6 +63,7 @@ _gl_cxx_ ## func ## l (long double l) \
return func (l); \
}
# define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func) \
_GL_BEGIN_NAMESPACE \
inline int \
func (float f) \
{ \
@@ -77,7 +78,8 @@ inline int \
func (long double l) \
{ \
return _gl_cxx_ ## func ## l (l); \
}
} \
_GL_END_NAMESPACE
#endif
/* Helper macros to define a portability warning for the
@@ -2044,7 +2046,7 @@ _GL_EXTERN_C int gl_isfinitel (long double x);
gl_isfinitef (x))
# endif
# ifdef __cplusplus
# ifdef isfinite
# if defined isfinite || defined GNULIB_NAMESPACE
_GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
# undef isfinite
_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite)
@@ -2071,7 +2073,7 @@ _GL_EXTERN_C int gl_isinfl (long double x);
gl_isinff (x))
# endif
# ifdef __cplusplus
# ifdef isinf
# if defined isinf || defined GNULIB_NAMESPACE
_GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
# undef isinf
_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf)
@@ -2189,7 +2191,7 @@ _GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
__builtin_isnanf ((float)(x)))
# endif
# ifdef __cplusplus
# ifdef isnan
# if defined isnan || defined GNULIB_NAMESPACE
_GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
# undef isnan
_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan)
@@ -2264,7 +2266,7 @@ _GL_EXTERN_C int gl_signbitl (long double arg);
gl_signbitf (x))
# endif
# ifdef __cplusplus
# ifdef signbit
# if defined signbit || defined GNULIB_NAMESPACE
_GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
# undef signbit
_GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit)

5
tests/test-math-c++.cc
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@@ -24,7 +24,8 @@
#include "signature.h"
/* Signature check for a function that takes a real-floating argument.
Check that each overloaded function with the specified signature exists. */
Check that each overloaded function with the specified signature
exists in the GNULIB_NAMESPACE namespace. */
#define REAL_FLOATING_CHECK(func,\
rettype1, parameters1,\
rettype2, parameters2,\
@@ -34,7 +35,7 @@
OVERLOADED_CHECK (func, rettype3, parameters3, _3)
#define OVERLOADED_CHECK(func, rettype, parameters, suffix) \
static rettype (* _GL_UNUSED signature_check_ ## func ## suffix) parameters \
= static_cast<rettype(*)parameters>(func)
= static_cast<rettype(*)parameters>(GNULIB_NAMESPACE::func)
/* Keep these checks in the same order as math.in.h! */