Maps entities to one carrier's names for them, or back. More...

#include <entity_mapping.h>

Public Member Functions
template<typename Fn, typename = std::enable_if_t<!std::is_same_v<std::decay_t<Fn>, EntityMapping>>>
	EntityMapping (Fn &fn) noexcept
	Wrap `fn`, the carrier's mapping.
R	operator() (A from) const
	Map one reference.

Detailed Description

template<typename R, typename A>
class Vkm::Engine::EntityMapping< R(A)>

Maps entities to one carrier's names for them, or back.

An EntityId means nothing outside the Scene that minted it, so a reference travels as a number only its carrier (a scene file, a prefab, a connection) can read. Non-owning and type-erased: a carrier passes a stack lambda, no allocation or template. Empty in is empty out, unasked.

Template Parameters

R	What the carrier maps to.
A	What it maps from; zero or a null EntityId is "none".

Constructor & Destructor Documentation

◆ EntityMapping()

template<typename R, typename A>

template<typename Fn, typename = std::enable_if_t<!std::is_same_v<std::decay_t<Fn>, EntityMapping>>>

Vkm::Engine::EntityMapping< R(A)>::EntityMapping ( Fn & fn )

inlinenoexcept

Wrap fn, the carrier's mapping.

Excludes its own type, or Fn& would out-match the copy constructor for a non-const lvalue.

Template Parameters

Fn	Callable as R(A). Must outlive the mapping.

Parameters

fn	The carrier's mapping; never asked for "none".

Member Function Documentation

◆ operator()()

template<typename R, typename A>

R Vkm::Engine::EntityMapping< R(A)>::operator() ( A from ) const

inline

Map one reference.