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Add util::ecs::species() for iterating over all species

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This commit is contained in:
Nikita Lisitsa 2022-10-27 20:59:34 +03:00
parent 24917370ea
commit 61885dde25
1 changed files with 37 additions and 2 deletions
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39
libs/util/include/psemek/util/ecs.hpp
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@ -3,6 +3,7 @@
#include <psemek/util/to_string.hpp>
#include <psemek/util/type_name.hpp>
#include <psemek/util/function.hpp>
#include <psemek/util/range.hpp>
#include <cstdint>
#include <typeindex>
@ -447,6 +448,37 @@ namespace psemek::util
void begin(species_handle, Components const & ...) {}
};
struct species_iterator
{
species_iterator(ecs_detail::species_handle h)
: h_(h)
{}
species_handle operator*() const
{
return species_handle{h_};
}
species_iterator & operator++()
{
++h_;
return *this;
}
friend bool operator == (species_iterator const & it1, species_iterator const & it2)
{
return it1.h_ == it2.h_;
}
friend bool operator != (species_iterator const & it1, species_iterator const & it2)
{
return !(it1 == it2);
}
private:
ecs_detail::species_handle h_;
};
enum class policy
{
sparse,
@ -456,7 +488,10 @@ namespace psemek::util
template <typename ... Components>
species_handle register_species(std::string name, policy p, Components && ... components);
ecs_detail::species_handle species_count() const { return species_.size(); }
util::range<species_iterator> species() const
{
return {species_iterator{0}, species_iterator{species_.size()}};
}
std::string_view species_name(species_handle species) const { return species_[species.value]->name(); }
@ -518,7 +553,7 @@ namespace psemek::util
template <typename ... Components>
ecs::species_handle ecs::register_species(std::string name, policy p, Components && ... components)
{
auto result = species_count();
auto result = species_.size();
if (p == policy::sparse)
species_.push_back(std::make_unique<ecs_detail::sparse_species_impl<Components...>>(std::move(name), result, std::move(components)...));
else