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Problem: C++11 partially supported on gcc 4.8

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Solution: Use intrinsic instead of std::is_trivially_copyable for gcc
versions older than 5.
This commit is contained in:
Gudmundur Adalsteinsson 2019-08-30 20:46:32 +00:00
parent 81c2938faa
commit 6137b485a0
2 changed files with 11 additions and 3 deletions
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2
README.md
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@ -36,7 +36,7 @@ Supported platforms
- Additional platforms that are known to work:
- We have no current reports on additional platforms that are known to work yet. Please add your platform here. If CI can be provided for them with a cloud-based CI service working with GitHub, you are invited to add CI, and make it possible to be included in the list above.
- Additional platforms that probably work:
- Any platform supported by libzmq that provides a sufficiently recent gcc (4.8.1 or newer) or clang (3.3 or newer)
- Any platform supported by libzmq that provides a sufficiently recent gcc (4.8.1 or newer) or clang (3.4.1 or newer)
- Visual Studio 2012+ x86/x64
Examples

12
zmq.hpp
View File

@ -122,6 +122,14 @@
#define ZMQ_DELETED_FUNCTION
#endif
#ifdef ZMQ_CPP11
#if defined(__GNUC__) && __GNUC__ < 5
#define ZMQ_IS_TRIVIALLY_COPYABLE(T) __has_trivial_copy(T)
#else
#define ZMQ_IS_TRIVIALLY_COPYABLE(T) std::is_trivially_copyable<T>::value
#endif
#endif
#if ZMQ_VERSION >= ZMQ_MAKE_VERSION(3, 3, 0)
#define ZMQ_NEW_MONITOR_EVENT_LAYOUT
#endif
@ -331,7 +339,7 @@ class message_t
template<class Range,
typename = typename std::enable_if<
detail::is_range<Range>::value
&& std::is_trivially_copyable<detail::range_value_t<Range>>::value
&& ZMQ_IS_TRIVIALLY_COPYABLE(detail::range_value_t<Range>)
&& !std::is_same<Range, message_t>::value>::type>
explicit message_t(const Range &rng) :
message_t(detail::ranges::begin(rng), detail::ranges::end(rng))
@ -948,7 +956,7 @@ template<class T> struct is_pod_like
// trivially copyable OR standard layout.
// Here we decide to be conservative and require both.
static constexpr bool value =
std::is_trivially_copyable<T>::value && std::is_standard_layout<T>::value;
ZMQ_IS_TRIVIALLY_COPYABLE(T) && std::is_standard_layout<T>::value;
};
template<class C> constexpr auto seq_size(const C &c) noexcept -> decltype(c.size())