function_traits.hpp File Reference

Compile-time utilities to inspect properties of functions. More...

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Classes
struct	flecs::is_callable< T >
	Trait to check if a type is callable. More...
struct	flecs::arity< T >
	Trait to get the number of arguments of a callable. More...
struct	flecs::first_arg_impl< Func, _::arg_list< T, Args ... > >
	Extract the first argument type from an arg_list. More...
struct	flecs::first_arg< Func >
	Get the first argument type of a callable. More...
struct	flecs::second_arg_impl< Func, _::arg_list< First, T, Args ... > >
	Extract the second argument type from an arg_list. More...
struct	flecs::second_arg< Func >
	Get the second argument type of a callable. More...

Namespaces
namespace	flecs::_
	Int to enum.

Typedefs
template<typename T >
using	flecs::return_type_t = typename _::function_traits<T>::return_type
	Get the return type of a callable.
template<typename T >
using	flecs::arg_list_t = typename _::function_traits<T>::args
	Get the argument list type of a callable.
template<typename Func >
using	flecs::first_arg_t = typename first_arg<Func>::type
	Convenience alias for the first argument type of a callable.
template<typename Func >
using	flecs::second_arg_t = typename second_arg<Func>::type
	Convenience alias for the second argument type of a callable.

Detailed Description

Compile-time utilities to inspect properties of functions.

Code from: https://stackoverflow.com/questions/27024238/c-template-mechanism-to-get-the-number-of-function-arguments-which-would-work

Definition in file function_traits.hpp.

Typedef Documentation

arg_list_t

template<typename T >

using flecs::arg_list_t = typename _::function_traits<T>::args

Get the argument list type of a callable.

Definition at line 129 of file function_traits.hpp.

first_arg_t

template<typename Func >

using flecs::first_arg_t = typename first_arg<Func>::type

Convenience alias for the first argument type of a callable.

Definition at line 149 of file function_traits.hpp.

return_type_t

template<typename T >

using flecs::return_type_t = typename _::function_traits<T>::return_type

Get the return type of a callable.

Definition at line 125 of file function_traits.hpp.

second_arg_t

template<typename Func >

using flecs::second_arg_t = typename second_arg<Func>::type

Convenience alias for the second argument type of a callable.

Definition at line 169 of file function_traits.hpp.