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change resolve to behave better with crappy clang

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ThePhD 2016-11-14 21:39:26 -05:00
parent b0612a5b68
commit b2d137f65f
1 changed files with 71 additions and 1 deletions
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72
sol/resolve.hpp
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@ -26,6 +26,9 @@
#include "tuple.hpp"
namespace sol {
// Clang has distinct problems with constexpr arguments,
// so don't use the constexpr versions inside of clang.
#ifndef __clang__
namespace detail {
template<typename R, typename... Args, typename F, typename = std::result_of_t<meta::unqualified_t<F>(Args...)>>
inline constexpr auto resolve_i(types<R(Args...)>, F&&)->R(meta::unqualified_t<F>::*)(Args...) {
@ -87,10 +90,77 @@ namespace sol {
return detail::resolve_v(std::is_member_object_pointer<Sig C::*>(), mem_ptr);
}
template<typename... Sig, typename F>
template<typename... Sig, typename F, meta::disable<std::is_function<meta::unqualified_t<F>>> = meta::enabler>
inline constexpr auto resolve(F&& f) -> decltype(detail::resolve_i(types<Sig...>(), std::forward<F>(f))) {
return detail::resolve_i(types<Sig...>(), std::forward<F>(f));
}
#else
namespace detail {
template<typename R, typename... Args, typename F, typename = std::result_of_t<meta::unqualified_t<F>(Args...)>>
inline auto resolve_i(types<R(Args...)>, F&&)->R(meta::unqualified_t<F>::*)(Args...) {
using Sig = R(Args...);
typedef meta::unqualified_t<F> Fu;
return static_cast<Sig Fu::*>(&Fu::operator());
}
template<typename F, typename U = meta::unqualified_t<F>>
inline auto resolve_f(std::true_type, F&& f)
-> decltype(resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f))) {
return resolve_i(types<meta::function_signature_t<decltype(&U::operator())>>(), std::forward<F>(f));
}
template<typename F>
inline void resolve_f(std::false_type, F&&) {
static_assert(meta::has_deducible_signature<F>::value,
"Cannot use no-template-parameter call with an overloaded functor: specify the signature");
}
template<typename F, typename U = meta::unqualified_t<F>>
inline auto resolve_i(types<>, F&& f) -> decltype(resolve_f(meta::has_deducible_signature<U>(), std::forward<F>(f))) {
return resolve_f(meta::has_deducible_signature<U> {}, std::forward<F>(f));
}
template<typename... Args, typename F, typename R = std::result_of_t<F&(Args...)>>
inline auto resolve_i(types<Args...>, F&& f) -> decltype(resolve_i(types<R(Args...)>(), std::forward<F>(f))) {
return resolve_i(types<R(Args...)>(), std::forward<F>(f));
}
template<typename Sig, typename C>
inline Sig C::* resolve_v(std::false_type, Sig C::* mem_func_ptr) {
return mem_func_ptr;
}
template<typename Sig, typename C>
inline Sig C::* resolve_v(std::true_type, Sig C::* mem_variable_ptr) {
return mem_variable_ptr;
}
} // detail
template<typename... Args, typename R>
inline auto resolve(R fun_ptr(Args...))->R(*)(Args...) {
return fun_ptr;
}
template<typename Sig>
inline Sig* resolve(Sig* fun_ptr) {
return fun_ptr;
}
template<typename... Args, typename R, typename C>
inline auto resolve(R(C::*mem_ptr)(Args...))->R(C::*)(Args...) {
return mem_ptr;
}
template<typename Sig, typename C>
inline Sig C::* resolve(Sig C::* mem_ptr) {
return detail::resolve_v(std::is_member_object_pointer<Sig C::*>(), mem_ptr);
}
template<typename... Sig, typename F>
inline auto resolve(F&& f) -> decltype(detail::resolve_i(types<Sig...>(), std::forward<F>(f))) {
return detail::resolve_i(types<Sig...>(), std::forward<F>(f));
}
#endif
} // sol
#endif // SOL_RESOLVE_HPP