Struct basic_collector<>
Synopsis
#include <src/entt/entity/observer.hpp>
template<>
struct basic_collector<>
Description
Collector.
A collector contains a set of rules (literally, matchers) to use to track entities.
Its main purpose is to generate a descriptor that allows an observer to know how to connect to a registry.
Methods
| group | Adds a grouping matcher to the collector. | |
| update | Adds an observing matcher to the collector. |
Source
Lines 46-68 in src/entt/entity/observer.hpp.
template<>
struct basic_collector<> {
/**
* @brief Adds a grouping matcher to the collector.
* @tparam AllOf Types of components tracked by the matcher.
* @tparam NoneOf Types of components used to filter out entities.
* @return The updated collector.
*/
template<typename... AllOf, typename... NoneOf>
static constexpr auto group(exclude_t<NoneOf...> = {}) ENTT_NOEXCEPT {
return basic_collector<matcher<type_list<>, type_list<>, type_list<NoneOf...>, AllOf...>>{};
}
/**
* @brief Adds an observing matcher to the collector.
* @tparam AnyOf Type of component for which changes should be detected.
* @return The updated collector.
*/
template<typename AnyOf>
static constexpr auto update() ENTT_NOEXCEPT {
return basic_collector<matcher<type_list<>, type_list<>, AnyOf>>{};
}
};