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lua api: add optional data type support (#9263)

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white-haired-uncle 2024-08-27 14:36:53 -04:00 • committed by GitHub
parent c9819eb85d
commit 60bbdc25c5
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1 changed files with 29 additions and 1 deletions
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30
src/scripting/push_check.hpp
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@ -40,6 +40,12 @@ namespace lua_check_impl
typename std::decay_t<T>::reference>
> : std::true_type {};
template<class T, template<class> class U>
inline constexpr bool is_instance_of_v = std::false_type{};
template<template<class> class U, class V>
inline constexpr bool is_instance_of_v<U<V>,U> = std::true_type{};
template<typename T, typename T2 = void>
struct is_map : std::false_type {};
@ -171,7 +177,7 @@ namespace lua_check_impl
}
//widget
//widget not suppored becasue lua_checek returns by value
//lua_check for widget is not supported because lua_check returns by value
template<typename T>
std::enable_if_t<std::is_same_v<T, gui2::widget>, void>
lua_push(lua_State *L, gui2::widget& val)
@ -344,6 +350,28 @@ namespace lua_check_impl
}
return *val;
}
//optional
template<typename T>
std::enable_if_t<is_instance_of_v<T, utils::optional>, T>
lua_check(lua_State *L, int n)
{
if(lua_isnoneornil(L, n)) {
return T();
}
return lua_check_impl::lua_check<typename T::value_type>(L, n);
}
template<typename T>
std::enable_if_t<is_instance_of_v<T, utils::optional>, void>
lua_push(lua_State *L, const T& opt)
{
if(opt) {
lua_check_impl::lua_push<typename T::value_type>(L, *opt);
} else {
lua_pushnil(L);
}
}
}
template<typename T>