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Problem: C++ version not correctly estimated (#429)

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* Problem: C++ version not correctly estimated

Solution: Include headers before checking macros and add additional checks for _MSVC_LANG.
This commit is contained in:
Gudmundur Adalsteinsson 2020-09-08 09:38:06 +00:00 committed by GitHub
parent bf4f75b971
commit e9716fa6e6
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1 changed files with 27 additions and 14 deletions
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41
zmq.hpp
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@ -32,20 +32,32 @@
#endif #endif
#endif #endif
// included here for _HAS_CXX* macros
#include <zmq.h>
#if defined(_MSVC_LANG)
#define CPPZMQ_LANG _MSVC_LANG
#else
#define CPPZMQ_LANG __cplusplus
#endif
// overwrite if specific language macros indicate higher version
#if defined(_HAS_CXX14) && _HAS_CXX14 && CPPZMQ_LANG < 201402L
#undef CPPZMQ_LANG
#define CPPZMQ_LANG 201402L
#endif
#if defined(_HAS_CXX17) && _HAS_CXX17 && CPPZMQ_LANG < 201703L
#undef CPPZMQ_LANG
#define CPPZMQ_LANG 201703L
#endif
// macros defined if has a specific standard or greater // macros defined if has a specific standard or greater
#if (defined(__cplusplus) && __cplusplus >= 201103L) \ #if CPPZMQ_LANG >= 201103L || (defined(_MSC_VER) && _MSC_VER >= 1900)
|| (defined(_MSC_VER) && _MSC_VER >= 1900)
#define ZMQ_CPP11 #define ZMQ_CPP11
#endif #endif
#if (defined(__cplusplus) && __cplusplus >= 201402L) \ #if CPPZMQ_LANG >= 201402L
|| (defined(_HAS_CXX14) && _HAS_CXX14 == 1) \
|| (defined(_HAS_CXX17) \
&& _HAS_CXX17 \
== 1) // _HAS_CXX14 might not be defined when using C++17 on MSVC
#define ZMQ_CPP14 #define ZMQ_CPP14
#endif #endif
#if (defined(__cplusplus) && __cplusplus >= 201703L) \ #if CPPZMQ_LANG >= 201703L
|| (defined(_HAS_CXX17) && _HAS_CXX17 == 1)
#define ZMQ_CPP17 #define ZMQ_CPP17
#endif #endif
@ -80,14 +92,15 @@
#define ZMQ_CONSTEXPR_VAR const #define ZMQ_CONSTEXPR_VAR const
#define ZMQ_CPP11_DEPRECATED(msg) #define ZMQ_CPP11_DEPRECATED(msg)
#endif #endif
#if defined(ZMQ_CPP14) && (!defined(_MSC_VER) || _MSC_VER > 1900)
#define ZMQ_EXTENDED_CONSTEXPR
#endif
#if defined(ZMQ_CPP17) #if defined(ZMQ_CPP17)
#define ZMQ_INLINE_VAR inline #define ZMQ_INLINE_VAR inline
#else #else
#define ZMQ_INLINE_VAR #define ZMQ_INLINE_VAR
#endif #endif
#include <zmq.h>
#include <cassert> #include <cassert>
#include <cstring> #include <cstring>
@ -1004,7 +1017,7 @@ class mutable_buffer
constexpr mutable_buffer() noexcept : _data(nullptr), _size(0) {} constexpr mutable_buffer() noexcept : _data(nullptr), _size(0) {}
constexpr mutable_buffer(void *p, size_t n) noexcept : _data(p), _size(n) constexpr mutable_buffer(void *p, size_t n) noexcept : _data(p), _size(n)
{ {
#ifdef ZMQ_CPP14 #ifdef ZMQ_EXTENDED_CONSTEXPR
assert(p != nullptr || n == 0); assert(p != nullptr || n == 0);
#endif #endif
} }
@ -1041,7 +1054,7 @@ class const_buffer
constexpr const_buffer() noexcept : _data(nullptr), _size(0) {} constexpr const_buffer() noexcept : _data(nullptr), _size(0) {}
constexpr const_buffer(const void *p, size_t n) noexcept : _data(p), _size(n) constexpr const_buffer(const void *p, size_t n) noexcept : _data(p), _size(n)
{ {
#ifdef ZMQ_CPP14 #ifdef ZMQ_EXTENDED_CONSTEXPR
assert(p != nullptr || n == 0); assert(p != nullptr || n == 0);
#endif #endif
} }
@ -1273,7 +1286,7 @@ template<class Char, size_t N>
constexpr const_buffer str_buffer(const Char (&data)[N]) noexcept constexpr const_buffer str_buffer(const Char (&data)[N]) noexcept
{ {
static_assert(detail::is_pod_like<Char>::value, "Char must be POD"); static_assert(detail::is_pod_like<Char>::value, "Char must be POD");
#ifdef ZMQ_CPP14 #ifdef ZMQ_EXTENDED_CONSTEXPR
assert(data[N - 1] == Char{0}); assert(data[N - 1] == Char{0});
#endif #endif
return const_buffer(static_cast<const Char *>(data), (N - 1) * sizeof(Char)); return const_buffer(static_cast<const Char *>(data), (N - 1) * sizeof(Char));