Flecs v3.2
A fast entity component system (ECS) for C & C++
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builder.hpp
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1
6#pragma once
7
9#include "builder_i.hpp"
10
11namespace flecs {
12namespace _ {
13 template <typename ... Components>
14 using filter_builder_base = builder<
15 filter, ecs_filter_desc_t, filter_builder<Components...>,
16 filter_builder_i, Components ...>;
17}
18
23template <typename ... Components>
24struct filter_builder final : _::filter_builder_base<Components...> {
25 filter_builder(flecs::world_t* world, const char *name = nullptr)
26 : _::filter_builder_base<Components...>(world)
27 {
28 _::sig<Components...>(world).populate(this);
29 if (name != nullptr) {
30 ecs_entity_desc_t entity_desc = {};
31 entity_desc.name = name;
32 entity_desc.sep = "::";
33 entity_desc.root_sep = "::";
34 this->m_desc.entity = ecs_entity_init(world, &entity_desc);
35 }
36 }
37
38 template <typename Func>
39 void each(Func&& func) {
40 this->build().each(FLECS_FWD(func));
41 }
42};
43
44}
Filter builder interface.
ecs_entity_t ecs_entity_init(ecs_world_t *world, const ecs_entity_desc_t *desc)
Find or create an entity.
struct ecs_filter_desc_t ecs_filter_desc_t
Used with ecs_filter_init().
Used with ecs_entity_init().
Definition flecs.h:898
const char * sep
Optional custom separator for hierarchical names.
Definition flecs.h:908
const char * root_sep
Optional, used for identifiers relative to root.
Definition flecs.h:912
const char * name
Name of the entity.
Definition flecs.h:903
Filter builder.
Definition builder.hpp:24
The world.
Definition world.hpp:132
Builder base class.