82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
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#ifndef ALSK_ALSK_SKELETON_TRAITS_H
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#define ALSK_ALSK_SKELETON_TRAITS_H
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#include <type_traits>
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#include "tags.h"
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namespace alsk {
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/**
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* @brief true if the given type is a Skeleton
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*/
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template<typename T, typename = void>
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struct IsSkeleton: std::false_type {};
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template<typename T>
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struct IsSkeleton<T, std::enable_if_t<std::is_same<typename std::decay_t<T>::IsSkeleton, tag::SkeletonTag>{}>>: std::true_type {};
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template<typename T>
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constexpr bool isSkeleton = IsSkeleton<T>::value;
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/**
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* @brief class to determine a skeleton traits
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* @param serial true if the skeleton cannot be run in parallel
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*/
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template<template<typename...> class S>
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struct SkeletonTraits {
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static constexpr bool serial = true;
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};
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template<typename> struct SkeletonTraitsTImpl;
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template<template<typename...> class S, typename... Ts>
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struct SkeletonTraitsTImpl<S<Ts...>> {
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using type = SkeletonTraits<S>;
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};
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template<typename S>
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using SkeletonTraitsT = typename SkeletonTraitsTImpl<std::decay_t<S>>::type;
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/**
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* @brief function to dynamically traverse a skeleton tree
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*
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* by default, do nothing (typically muscle case)
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*/
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template<typename Muscle, typename F,
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std::enable_if_t<not isSkeleton<std::decay_t<Muscle>>>* = nullptr
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>
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void skeletonTraversal(Muscle&&, F&&) {}
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/**
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* @brief template to specialize to implement a bone
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*/
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template<typename Skeleton, typename Tag, typename Executor, typename Context> struct Impl;
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/**
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* @brief template to specialize to define how to traverse a bone
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*/
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template<typename Skeleton, typename=void>
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struct SkeletonTraversal;
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/**
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* @brief returns steps between two instances of the skeleton
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*/
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template<typename Skeleton, std::enable_if_t<isSkeleton<Skeleton>>* = nullptr>
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constexpr std::size_t skeletonStep(Skeleton const& s) {
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return s.step;
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}
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/**
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* @brief returns 0
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*/
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template<typename Skeleton, std::enable_if_t<not isSkeleton<Skeleton>>* = nullptr>
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constexpr std::size_t skeletonStep(Skeleton const&) {
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return 0;
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}
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}
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#endif
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