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Define [U]LLONG_{MIN,MAX} for C++11, add tests. 

Add tests for limits.h, not just [U]LLONG_{MIN,MAX}.

llvm-svn: 193506
This commit is contained in:
JF Bastien 2013-10-27 19:00:49 +00:00
parent 07e6eff8fa
commit 1334d0aedf
2 changed files with 46 additions and 2 deletions
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6
clang/lib/Headers/limits.h
View File

@ -87,8 +87,10 @@
#define CHAR_MAX __SCHAR_MAX__
#endif
/* C99 5.2.4.2.1: Added long long. */
#if __STDC_VERSION__ >= 199901
/* C99 5.2.4.2.1: Added long long.
C++11 18.3.3.2: same contents as the Standard C Library header <limits.h>.
*/
#if __STDC_VERSION__ >= 199901 || __cplusplus >= 201103L
#undef LLONG_MIN
#undef LLONG_MAX

42
clang/test/Headers/limits.cpp Normal file
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@ -0,0 +1,42 @@
// RUN: %clang_cc1 -ffreestanding -fsyntax-only -verify %s
// RUN: %clang_cc1 -fno-signed-char -ffreestanding -fsyntax-only -verify %s
// RUN: %clang_cc1 -std=c++11 -ffreestanding -fsyntax-only -verify %s
// expected-no-diagnostics
#include <limits.h>
_Static_assert(SCHAR_MAX == -(SCHAR_MIN+1), "");
_Static_assert(SHRT_MAX == -(SHRT_MIN+1), "");
_Static_assert(INT_MAX == -(INT_MIN+1), "");
_Static_assert(LONG_MAX == -(LONG_MIN+1L), "");
_Static_assert(SCHAR_MAX == UCHAR_MAX/2, "");
_Static_assert(SHRT_MAX == USHRT_MAX/2, "");
_Static_assert(INT_MAX == UINT_MAX/2, "");
_Static_assert(LONG_MAX == ULONG_MAX/2, "");
_Static_assert(SCHAR_MIN == -SCHAR_MAX-1, "");
_Static_assert(SHRT_MIN == -SHRT_MAX-1, "");
_Static_assert(INT_MIN == -INT_MAX-1, "");
_Static_assert(LONG_MIN == -LONG_MAX-1L, "");
_Static_assert(UCHAR_MAX == (unsigned char)~0ULL, "");
_Static_assert(USHRT_MAX == (unsigned short)~0ULL, "");
_Static_assert(UINT_MAX == (unsigned int)~0ULL, "");
_Static_assert(ULONG_MAX == (unsigned long)~0ULL, "");
_Static_assert(MB_LEN_MAX >= 1, "");
_Static_assert(CHAR_BIT >= 8, "");
const bool char_is_signed = (char)-1 < (char)0;
_Static_assert(CHAR_MIN == (char_is_signed ? -CHAR_MAX-1 : 0), "");
_Static_assert(CHAR_MAX == (char_is_signed ? -(CHAR_MIN+1) : (char)~0ULL), "");
#if __STDC_VERSION__ >= 199901 || __cplusplus >= 201103L
_Static_assert(LLONG_MAX == -(LLONG_MIN+1LL), "");
_Static_assert(LLONG_MIN == -LLONG_MAX-1LL, "");
_Static_assert(ULLONG_MAX == (unsigned long long)~0ULL, "");
#else
int LLONG_MIN, LLONG_MAX, ULLONG_MAX; // Not defined.
#endif