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Add static_assert-raising error for overload_cast in c++11

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I got some unexpected errors from code using `overload_cast` until I
realized that I'd configured the build with -std=c++11.

This commit adds a fake `overload_cast` class in C++11 mode that
triggers a static_assert failure indicating that C++14 is needed.
This commit is contained in:
Jason Rhinelander 2017-04-16 21:58:29 -04:00
parent d355f2fcca
commit fb50ce1fef
1 changed files with 5 additions and 0 deletions
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5
include/pybind11/common.h
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@ -655,6 +655,11 @@ static constexpr detail::overload_cast_impl<Args...> overload_cast = {};
/// - sweet: overload_cast<Arg>(&Class::func, const_)
static constexpr auto const_ = std::true_type{};
#else // no overload_cast: providing something that static_assert-fails:
template <typename... Args> struct overload_cast {
static_assert(detail::deferred_t<std::false_type, Args...>::value,
"pybind11::overload_cast<...> requires compiling in C++14 mode");
};
#endif // overload_cast
NAMESPACE_BEGIN(detail)