#include <api.hpp>
Inheritance diagram for fc::detail::optionals_callable< R, Parameters >:
Classes | |
| struct | pack_cutter |
| struct | pack_cutter_impl |
| struct | pack_cutter_impl< 0, void, Types... > |
| struct | pack_cutter_impl< RemoveCount, std::enable_if_t< RemoveCount !=0 >, T, Types... > |
| struct | short_pack |
Public Types | |
| template<unsigned RemoveCount, typename... Types> | |
| using | pack_cutter_t = typename pack_cutter< RemoveCount, Types... >::type |
Public Member Functions | |
| template<typename F , typename... OptionalTypes> | |
| R | call_function (F &&f, short_pack< OptionalTypes... >) |
Detailed Description
template<typename R, typename... Parameters>
struct fc::detail::optionals_callable< R, Parameters >
A wrapper of std::function allowing callers to omit the last several arguments if those arguments are fc::optional types. i.e. given a function taking (int, double, bool, fc::optional<string>, fc::optional<char>), whereas normally the last two arguments must be provided, this template allows them to be omitted. Note that this only applies to trailing optional arguments, i.e. given a callable taking (fc::optional<int>, int, fc::optional<int>), only the last argument can be omitted.
A discussion of how exactly this works is available here: https://github.com/bitshares/bitshares-fc/pull/126#issuecomment-490566060
Member Typedef Documentation
◆ pack_cutter_t
template<typename R , typename... Parameters>
template<unsigned RemoveCount, typename... Types>
| using fc::detail::optionals_callable< R, Parameters >::pack_cutter_t = typename pack_cutter<RemoveCount, Types...>::type |
Member Function Documentation
◆ call_function()
template<typename R , typename... Parameters>
template<typename F , typename... OptionalTypes>
|
inline |
The documentation for this struct was generated from the following file:
- libraries/fc/include/fc/api.hpp
