generic-library/cxx
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity
d8bfe7ba56
cxx/include/__config
Howard Hinnant 8b00e6c960 Ok, 3 major changes for debug mode in one commit: 
1.  I had been detecting and trapping iterator == and \!= among iterators
    in different containers as an error.  But the trapping itself is actually
    an error.
    
    Consider:
    
    #include <iostream>
    #include <vector>
    #include <algorithm>

    template <class C>
    void
    display(const C& c)
    {
        std::cout << "{";
        bool first = true;
        for (const auto& x : c)
        {
            if (\!first)
                std::cout << ", ";
            first = false;
            std::cout << x;
        }
        std::cout << "}\n";
    }

    int
    main()
    {
        typedef std::vector<int> V;
        V v1 = {1, 3, 5};
        V v2 = {2, 4, 6};
        display(v1);
        display(v2);
        V::iterator i = std::find(v1.begin(), v1.end(), 1);
        V::iterator j = std::find(v2.begin(), v2.end(), 2);
        if (*i == *j)
            i = j;    // perfectly legal
        // ...
        if (i \!= j)   // the only way to check
            v2.push_back(*i);
        display(v1);
        display(v2);
    }

    It is legal to assign an iterator from one container to another of the
    same type.  This is required to work.  One might want to test whether or
    not such an assignment had been made.  The way one performs such a check
    is using the iterator's ==, \!= operator.  This is a logical and necessary
    function and does not constitute an error.

2.  I had a header circular dependence bug when _LIBCPP_DEBUG2 is defined.
    This caused a problem in several of the libc++ tests.
    Fixed.

3.  There is a serious problem when _LIBCPP_DEBUG2=1 at the moment in that
    std::basic_string is inoperable.  std::basic_string uses __wrap_iterator
    to implement its iterators.  __wrap_iterator has been rigged up in debug
    mode to support vector.  But string hasn't been rigged up yet.  This means
    that one gets false positives when using std::string in debug mode.  I've
    upped std::string's priority in www/debug_mode.html.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@187636 91177308-0d34-0410-b5e6-96231b3b80d8
2013-08-02 00:26:35 +00:00

533 lines
13 KiB
C++
Raw Blame History

// -*- C++ -*-
//===--------------------------- __config ---------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#ifndef _LIBCPP_CONFIG
#define _LIBCPP_CONFIG
#if !defined(_MSC_VER) || defined(__clang__)
#pragma GCC system_header
#endif
#ifdef __GNUC__
#define _GNUC_VER (__GNUC__ * 100 + __GNUC_MINOR__)
#endif
#define _LIBCPP_VERSION 1101
#define _LIBCPP_ABI_VERSION 1
#define _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_X##_LIBCPP_Y
#define _LIBCPP_CONCAT(_LIBCPP_X,_LIBCPP_Y) _LIBCPP_CONCAT1(_LIBCPP_X,_LIBCPP_Y)
#define _LIBCPP_NAMESPACE _LIBCPP_CONCAT(__,_LIBCPP_ABI_VERSION)
#ifdef __LITTLE_ENDIAN__
#if __LITTLE_ENDIAN__
#define _LIBCPP_LITTLE_ENDIAN 1
#define _LIBCPP_BIG_ENDIAN 0
#endif // __LITTLE_ENDIAN__
#endif // __LITTLE_ENDIAN__
#ifdef __BIG_ENDIAN__
#if __BIG_ENDIAN__
#define _LIBCPP_LITTLE_ENDIAN 0
#define _LIBCPP_BIG_ENDIAN 1
#endif // __BIG_ENDIAN__
#endif // __BIG_ENDIAN__
#ifdef __FreeBSD__
# include <sys/endian.h>
# if _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN 1
# define _LIBCPP_BIG_ENDIAN 0
# else // _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN 0
# define _LIBCPP_BIG_ENDIAN 1
# endif // _BYTE_ORDER == _LITTLE_ENDIAN
# ifndef __LONG_LONG_SUPPORTED
# define _LIBCPP_HAS_NO_LONG_LONG
# endif // __LONG_LONG_SUPPORTED
#endif // __FreeBSD__
#ifdef __NetBSD__
# include <sys/endian.h>
# if _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN 1
# define _LIBCPP_BIG_ENDIAN 0
# else // _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN 0
# define _LIBCPP_BIG_ENDIAN 1
# endif // _BYTE_ORDER == _LITTLE_ENDIAN
# define _LIBCPP_HAS_QUICK_EXIT
#endif // __NetBSD__
#ifdef _WIN32
# define _LIBCPP_LITTLE_ENDIAN 1
# define _LIBCPP_BIG_ENDIAN 0
// Compiler intrinsics (GCC or MSVC)
# if defined(__clang__) \
|| (defined(_MSC_VER) && _MSC_VER >= 1400) \
|| (defined(__GNUC__) && _GNUC_VER > 403)
# define _LIBCPP_HAS_IS_BASE_OF
# endif
# if defined(_MSC_VER) && !defined(__clang__)
# define _LIBCPP_MSVC // Using Microsoft Visual C++ compiler
# endif
# define _LIBCPP_MSVCRT // Using Microsoft's C Runtime library
#endif // _WIN32
#ifdef __linux__
# if defined(__GNUC__) && _GNUC_VER >= 403
# define _LIBCPP_HAS_IS_BASE_OF
# endif
#endif
#ifdef __sun__
# include <sys/isa_defs.h>
# ifdef _LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN 1
# define _LIBCPP_BIG_ENDIAN 0
# else
# define _LIBCPP_LITTLE_ENDIAN 0
# define _LIBCPP_BIG_ENDIAN 1
# endif
#endif // __sun__
#if !defined(_LIBCPP_LITTLE_ENDIAN) || !defined(_LIBCPP_BIG_ENDIAN)
# include <endian.h>
# if __BYTE_ORDER == __LITTLE_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN 1
# define _LIBCPP_BIG_ENDIAN 0
# elif __BYTE_ORDER == __BIG_ENDIAN
# define _LIBCPP_LITTLE_ENDIAN 0
# define _LIBCPP_BIG_ENDIAN 1
# else // __BYTE_ORDER == __BIG_ENDIAN
# error unable to determine endian
# endif
#endif // !defined(_LIBCPP_LITTLE_ENDIAN) || !defined(_LIBCPP_BIG_ENDIAN)
#ifdef _WIN32
// only really useful for a DLL
#ifdef _LIBCPP_DLL // this should be a compiler builtin define ideally...
# ifdef cxx_EXPORTS
# define _LIBCPP_HIDDEN
# define _LIBCPP_FUNC_VIS __declspec(dllexport)
# define _LIBCPP_TYPE_VIS __declspec(dllexport)
# else
# define _LIBCPP_HIDDEN
# define _LIBCPP_FUNC_VIS __declspec(dllimport)
# define _LIBCPP_TYPE_VIS __declspec(dllimport)
# endif
#else
# define _LIBCPP_HIDDEN
# define _LIBCPP_FUNC_VIS
# define _LIBCPP_TYPE_VIS
#endif
#ifndef _LIBCPP_INLINE_VISIBILITY
# ifdef _LIBCPP_MSVC
# define _LIBCPP_INLINE_VISIBILITY __forceinline
# else // MinGW GCC and Clang
# define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__always_inline__))
# endif
#endif
#ifndef _LIBCPP_EXCEPTION_ABI
#define _LIBCPP_EXCEPTION_ABI _LIBCPP_TYPE_VIS
#endif
#ifndef _LIBCPP_ALWAYS_INLINE
# ifdef _LIBCPP_MSVC
# define _LIBCPP_ALWAYS_INLINE __forceinline
# endif
#endif
#endif // _WIN32
#ifndef __has_attribute
#define __has_attribute(__x) 0
#endif
#ifndef _LIBCPP_HIDDEN
#define _LIBCPP_HIDDEN __attribute__ ((__visibility__("hidden")))
#endif
#ifndef _LIBCPP_FUNC_VIS
#define _LIBCPP_FUNC_VIS __attribute__ ((__visibility__("default")))
#endif
#ifndef _LIBCPP_TYPE_VIS
# if __has_attribute(type_visibility)
# define _LIBCPP_TYPE_VIS __attribute__ ((__type_visibility__("default")))
# else
# define _LIBCPP_TYPE_VIS __attribute__ ((__visibility__("default")))
# endif
#endif
#ifndef _LIBCPP_INLINE_VISIBILITY
#define _LIBCPP_INLINE_VISIBILITY __attribute__ ((__visibility__("hidden"), __always_inline__))
#endif
#ifndef _LIBCPP_EXCEPTION_ABI
#define _LIBCPP_EXCEPTION_ABI _LIBCPP_TYPE_VIS
#endif
#ifndef _LIBCPP_CANTTHROW
#define _LIBCPP_CANTTHROW __attribute__ ((__nothrow__))
#endif
#ifndef _LIBCPP_ALWAYS_INLINE
#define _LIBCPP_ALWAYS_INLINE __attribute__ ((__visibility__("hidden"), __always_inline__))
#endif
#if defined(__clang__)
#if __has_feature(cxx_alignas)
# define _ALIGNAS_TYPE(x) alignas(x)
# define _ALIGNAS(x) alignas(x)
#else
# define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
# define _ALIGNAS(x) __attribute__((__aligned__(x)))
#endif
#if !__has_feature(cxx_alias_templates)
#define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
#endif
#ifndef __GXX_EXPERIMENTAL_CXX0X__
#ifdef __linux__
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#else
typedef __char16_t char16_t;
typedef __char32_t char32_t;
#endif
#endif
#if !(__has_feature(cxx_exceptions))
#define _LIBCPP_NO_EXCEPTIONS
#endif
#if !(__has_feature(cxx_rtti))
#define _LIBCPP_NO_RTTI
#endif
#if !(__has_feature(cxx_strong_enums))
#define _LIBCPP_HAS_NO_STRONG_ENUMS
#endif
#if !(__has_feature(cxx_decltype))
#define _LIBCPP_HAS_NO_DECLTYPE
#endif
#if __has_feature(cxx_attributes)
# define _LIBCPP_NORETURN [[noreturn]]
#else
# define _LIBCPP_NORETURN __attribute__ ((noreturn))
#endif
#if !(__has_feature(cxx_defaulted_functions))
#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
#endif // !(__has_feature(cxx_defaulted_functions))
#if !(__has_feature(cxx_deleted_functions))
#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
#endif // !(__has_feature(cxx_deleted_functions))
#if !(__has_feature(cxx_lambdas))
#define _LIBCPP_HAS_NO_LAMBDAS
#endif
#if !(__has_feature(cxx_nullptr))
#define _LIBCPP_HAS_NO_NULLPTR
#endif
#if !(__has_feature(cxx_rvalue_references))
#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
#endif
#if !(__has_feature(cxx_static_assert))
#define _LIBCPP_HAS_NO_STATIC_ASSERT
#endif
#if !(__has_feature(cxx_auto_type))
#define _LIBCPP_HAS_NO_AUTO_TYPE
#endif
#if !(__has_feature(cxx_access_control_sfinae)) || !__has_feature(cxx_trailing_return)
#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
#endif
#if !(__has_feature(cxx_variadic_templates))
#define _LIBCPP_HAS_NO_VARIADICS
#endif
#if !(__has_feature(cxx_trailing_return))
#define _LIBCPP_HAS_NO_TRAILING_RETURN
#endif
#if !(__has_feature(cxx_generalized_initializers))
#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
#endif
#if __has_feature(is_base_of)
# define _LIBCPP_HAS_IS_BASE_OF
#endif
// Objective-C++ features (opt-in)
#if __has_feature(objc_arc)
#define _LIBCPP_HAS_OBJC_ARC
#endif
#if __has_feature(objc_arc_weak)
#define _LIBCPP_HAS_OBJC_ARC_WEAK
#define _LIBCPP_HAS_NO_STRONG_ENUMS
#endif
#if !(__has_feature(cxx_constexpr))
#define _LIBCPP_HAS_NO_CONSTEXPR
#endif
#if __ISO_C_VISIBLE >= 2011 || __cplusplus >= 201103L
#if defined(__FreeBSD__)
#define _LIBCPP_HAS_QUICK_EXIT
#define _LIBCPP_HAS_C11_FEATURES
#elif defined(__linux__)
#include <features.h>
#if __GLIBC_PREREQ(2, 15)
#define _LIBCPP_HAS_QUICK_EXIT
#endif
#if __GLIBC_PREREQ(2, 17)
#define _LIBCPP_HAS_C11_FEATURES
#endif
#endif
#endif
#if (__has_feature(cxx_noexcept))
# define _NOEXCEPT noexcept
# define _NOEXCEPT_(x) noexcept(x)
#else
# define _NOEXCEPT throw()
# define _NOEXCEPT_(x)
#endif
#if __has_feature(underlying_type)
# define _LIBCXX_UNDERLYING_TYPE(T) __underlying_type(T)
#endif
// Inline namespaces are available in Clang regardless of C++ dialect.
#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {inline namespace _LIBCPP_NAMESPACE {
#define _LIBCPP_END_NAMESPACE_STD } }
#define _VSTD std::_LIBCPP_NAMESPACE
namespace std {
inline namespace _LIBCPP_NAMESPACE {
}
}
#elif defined(__GNUC__)
#define _ALIGNAS(x) __attribute__((__aligned__(x)))
#define _ALIGNAS_TYPE(x) __attribute__((__aligned__(__alignof(x))))
#define _LIBCPP_NORETURN __attribute__((noreturn))
#if !__EXCEPTIONS
#define _LIBCPP_NO_EXCEPTIONS
#endif
#define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
#define _LIBCPP_HAS_NO_CONSTEXPR
#define _NOEXCEPT throw()
#define _NOEXCEPT_(x)
#ifndef __GXX_EXPERIMENTAL_CXX0X__
#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
#define _LIBCPP_HAS_NO_DECLTYPE
#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
#define _LIBCPP_HAS_NO_NULLPTR
#define _LIBCPP_HAS_NO_STATIC_ASSERT
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#define _LIBCPP_HAS_NO_VARIADICS
#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
#define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS
#else // __GXX_EXPERIMENTAL_CXX0X__
#define _LIBCPP_HAS_NO_TRAILING_RETURN
#define _LIBCPP_HAS_NO_ALWAYS_INLINE_VARIADICS
#if _GNUC_VER < 403
#define _LIBCPP_HAS_NO_RVALUE_REFERENCES
#endif
#if _GNUC_VER < 403
#define _LIBCPP_HAS_NO_STATIC_ASSERT
#endif
#if _GNUC_VER < 404
#define _LIBCPP_HAS_NO_ADVANCED_SFINAE
#define _LIBCPP_HAS_NO_DECLTYPE
#define _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#define _LIBCPP_HAS_NO_VARIADICS
#define _LIBCPP_HAS_NO_GENERALIZED_INITIALIZERS
#endif // _GNUC_VER < 404
#if _GNUC_VER < 406
#define _LIBCPP_HAS_NO_NULLPTR
#endif
#endif // __GXX_EXPERIMENTAL_CXX0X__
#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std { namespace _LIBCPP_NAMESPACE {
#define _LIBCPP_END_NAMESPACE_STD } }
#define _VSTD std::_LIBCPP_NAMESPACE
namespace std {
namespace _LIBCPP_NAMESPACE {
}
using namespace _LIBCPP_NAMESPACE __attribute__((__strong__));
}
#elif defined(_LIBCPP_MSVC)
#define _LIBCPP_HAS_NO_TEMPLATE_ALIASES
#define _LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER
#define _LIBCPP_HAS_NO_CONSTEXPR
#define _LIBCPP_HAS_NO_UNICODE_CHARS
#define _LIBCPP_HAS_NO_DELETED_FUNCTIONS
#define __alignof__ __alignof
#define _LIBCPP_NORETURN __declspec(noreturn)
#define _ALIGNAS(x) __declspec(align(x))
#define _LIBCPP_HAS_NO_VARIADICS
#define _NOEXCEPT throw()
#define _NOEXCEPT_(x)
#define _LIBCPP_BEGIN_NAMESPACE_STD namespace std {
#define _LIBCPP_END_NAMESPACE_STD }
#define _VSTD std
namespace std {
}
#endif // __clang__ || __GNUC__ || _LIBCPP_MSVC
#ifdef _LIBCPP_HAS_NO_UNICODE_CHARS
typedef unsigned short char16_t;
typedef unsigned int char32_t;
#endif // _LIBCPP_HAS_NO_UNICODE_CHARS
#ifdef _LIBCPP_HAS_NO_STATIC_ASSERT
template <bool> struct __static_assert_test;
template <> struct __static_assert_test<true> {};
template <unsigned> struct __static_assert_check {};
#define static_assert(__b, __m) \
typedef __static_assert_check<sizeof(__static_assert_test<(__b)>)> \
_LIBCPP_CONCAT(__t, __LINE__)
#endif // _LIBCPP_HAS_NO_STATIC_ASSERT
#ifdef _LIBCPP_HAS_NO_DECLTYPE
#define decltype(x) __typeof__(x)
#endif
#ifdef _LIBCPP_HAS_NO_CONSTEXPR
#define _LIBCPP_CONSTEXPR
#else
#define _LIBCPP_CONSTEXPR constexpr
#endif
#ifdef _LIBCPP_HAS_NO_DEFAULTED_FUNCTIONS
#define _LIBCPP_DEFAULT {}
#else
#define _LIBCPP_DEFAULT = default;
#endif
#ifdef __GNUC__
#define _NOALIAS __attribute__((__malloc__))
#else
#define _NOALIAS
#endif
#ifndef __has_feature
#define __has_feature(__x) 0
#endif
#if __has_feature(cxx_explicit_conversions)
# define _LIBCPP_EXPLICIT explicit
#else
# define _LIBCPP_EXPLICIT
#endif
#ifdef _LIBCPP_HAS_NO_STRONG_ENUMS
#define _LIBCPP_DECLARE_STRONG_ENUM(x) struct _LIBCPP_TYPE_VIS x { enum __lx
#define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x) \
__lx __v_; \
_LIBCPP_ALWAYS_INLINE x(__lx __v) : __v_(__v) {} \
_LIBCPP_ALWAYS_INLINE explicit x(int __v) : __v_(static_cast<__lx>(__v)) {} \
_LIBCPP_ALWAYS_INLINE operator int() const {return __v_;} \
};
#else // _LIBCPP_HAS_NO_STRONG_ENUMS
#define _LIBCPP_DECLARE_STRONG_ENUM(x) enum class _LIBCPP_TYPE_VIS x
#define _LIBCPP_DECLARE_STRONG_ENUM_EPILOG(x)
#endif // _LIBCPP_HAS_NO_STRONG_ENUMS
#ifndef _LIBCPP_EXTERN_TEMPLATE
#define _LIBCPP_EXTERN_TEMPLATE(...) extern template __VA_ARGS__;
#endif
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(_WIN32) || defined(__sun__) || defined(__NetBSD__)
#define _LIBCPP_LOCALE__L_EXTENSIONS 1
#endif
#ifdef __FreeBSD__
#define _DECLARE_C99_LDBL_MATH 1
#endif
#if defined(__APPLE__) || defined(__FreeBSD__)
#define _LIBCPP_HAS_DEFAULTRUNELOCALE
#endif
#if defined(__APPLE__) || defined(__FreeBSD__) || defined(__sun__)
#define _LIBCPP_WCTYPE_IS_MASK
#endif
#ifdef _LIBCPP_DEBUG2
# if _LIBCPP_DEBUG2 == 0
# define _LIBCPP_DEBUG_LEVEL 1
# elif _LIBCPP_DEBUG2 == 1
# define _LIBCPP_DEBUG_LEVEL 2
# else
# error Supported values for _LIBCPP_DEBUG2 are 0 and 1
# endif
#endif
#ifndef _LIBCPP_STD_VER
# if __cplusplus <= 201103L
# define _LIBCPP_STD_VER 11
# else
# define _LIBCPP_STD_VER 13 // current year, or date of c++14 ratification
# endif
#endif // _LIBCPP_STD_VER
#if _LIBCPP_STD_VER <= 11
#define _LIBCPP_CONSTEXPR_AFTER_CXX11
#else
#define _LIBCPP_CONSTEXPR_AFTER_CXX11 constexpr
#endif
#endif // _LIBCPP_CONFIG
Reference in New Issue View Git Blame Copy Permalink