Function meta_invoke
Summary
#include <src/entt/meta/utility.hpp>
(1) template <typename Type, typename Policy = as_is_t, typename Candidate>
meta_any meta_invoke([[maybe_unused]] meta_handle instance, Candidate &&candidate, [[maybe_unused]] meta_any *const args)
(2) template <typename Type, auto Candidate, typename Policy = as_is_t>
meta_any meta_invoke(meta_handle instance, meta_any *const args)
Function overload
Synopsis
#include <src/entt/meta/utility.hpp>
template <typename Type, typename Policy = as_is_t, typename Candidate>
meta_any meta_invoke([[maybe_unused]] meta_handle instance, Candidate &&candidate, [[maybe_unused]] meta_any *const args)
Description
Invokes a callable object given a list of erased parameters, if possible.
- Template Parameters
Type- Reflected type to which the callable object is associated.Policy- Optional policy (no policy set by default).Candidate- The type of the actual callable object to invoke.- Parameters
instance- An opaque instance of the underlying type, if required.candidate- The actual callable object to invoke.args- Parameters to use to invoke the callable object.- Returns
- A meta any containing the returned value, if any.
Source
Lines 325-337 in src/entt/meta/utility.hpp.
template<typename Type, typename Policy = as_is_t, typename Candidate>
[[nodiscard]] meta_any meta_invoke([[maybe_unused]] meta_handle instance, Candidate &&candidate, [[maybe_unused]] meta_any * const args) {
if constexpr(std::is_invocable_v<std::remove_reference_t<Candidate>>) {
if constexpr(std::is_void_v<decltype(std::forward<Candidate>(candidate)())>) {
std::forward<Candidate>(candidate)();
return meta_any{std::in_place_type<void>};
} else {
return meta_dispatch<Policy>(std::forward<Candidate>(candidate)());
}
} else {
return internal::meta_invoke<Type, Policy>(std::move(instance), std::forward<Candidate>(candidate), args, std::make_index_sequence<meta_function_helper_t<Type, std::remove_reference_t<Candidate>>::args_type::size>{});
}
}
Synopsis
#include <src/entt/meta/utility.hpp>
template <typename Type, auto Candidate, typename Policy = as_is_t>
meta_any meta_invoke(meta_handle instance, meta_any *const args)
Description
Invokes a function given a list of erased parameters, if possible.
- Template Parameters
Type- Reflected type to which the function is associated.Candidate- The actual function to invoke.Policy- Optional policy (no policy set by default).- Parameters
instance- An opaque instance of the underlying type, if required.args- Parameters to use to invoke the function.- Returns
- A meta any containing the returned value, if any.
Source
Lines 349-352 in src/entt/meta/utility.hpp.
template<typename Type, auto Candidate, typename Policy = as_is_t>
[[nodiscard]] meta_any meta_invoke(meta_handle instance, meta_any * const args) {
return meta_invoke<Type, Policy>(std::move(instance), Candidate, args);
}