BlackMATov/ecs.hpp
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std ext: as_const

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This commit is contained in:
Matvey Cherevko
2018-12-26 18:12:19 +07:00
parent 3c2d057ece
commit 8a7f6c26a3
1 changed files with 23 additions and 6 deletions
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29
ecs.hpp
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@@ -45,6 +45,23 @@ namespace ecs_hpp
"ecs_hpp::entity_id must be an unsigned integer");
}
// -----------------------------------------------------------------------------
//
// utilities
//
// -----------------------------------------------------------------------------
namespace ecs_hpp
{
namespace detail
{
template < typename T >
constexpr std::add_const_t<T>& as_const(T& t) noexcept {
return t;
}
}
}
// -----------------------------------------------------------------------------
//
// detail::type_family
@@ -384,7 +401,7 @@ namespace ecs_hpp
}
inline bool entity::is_alive() const noexcept {
return const_cast<const world&>(owner_).is_entity_alive(*this);
return detail::as_const(owner_).is_entity_alive(*this);
}
template < typename T, typename... Args >
@@ -401,7 +418,7 @@ namespace ecs_hpp
template < typename T >
bool entity::exists_component() const noexcept {
return const_cast<const world&>(owner_).exists_component<T>(*this);
return detail::as_const(owner_).exists_component<T>(*this);
}
inline std::size_t entity::remove_all_components() noexcept {
@@ -415,7 +432,7 @@ namespace ecs_hpp
template < typename T >
const T& entity::get_component() const {
return const_cast<const world&>(owner_).get_component<T>(*this);
return detail::as_const(owner_).get_component<T>(*this);
}
template < typename T >
@@ -425,7 +442,7 @@ namespace ecs_hpp
template < typename T >
const T* entity::find_component() const noexcept {
return const_cast<const world&>(owner_).find_component<T>(*this);
return detail::as_const(owner_).find_component<T>(*this);
}
template < typename... Ts >
@@ -435,7 +452,7 @@ namespace ecs_hpp
template < typename... Ts >
std::tuple<const Ts&...> entity::get_components() const {
return const_cast<const world&>(owner_).get_components<Ts...>(*this);
return detail::as_const(owner_).get_components<Ts...>(*this);
}
template < typename... Ts >
@@ -445,7 +462,7 @@ namespace ecs_hpp
template < typename... Ts >
std::tuple<const Ts*...> entity::find_components() const noexcept {
return const_cast<const world&>(owner_).find_components<Ts...>(*this);
return detail::as_const(owner_).find_components<Ts...>(*this);
}
inline bool operator==(const entity& l, const entity& r) noexcept {