Add concepts.hlsl to cpp_compat.

Author: theoreticalphysicsftw

include/nbl/builtin/hlsl/cpp_compat/concepts.hlsl

@@ -0,0 +1,88 @@
+// Copyright (C) 2023 - DevSH Graphics Programming Sp. z O.O.
+// This file is part of the "Nabla Engine".
+// For conditions of distribution and use, see copyright notice in nabla.h
+
+#ifndef _NBL_BUILTIN_HLSL_CPP_COMPAT_CONCEPT_INCLUDED_
+#define _NBL_BUILTIN_HLSL_CPP_COMPAT_CONCEPT_INCLUDED_
+
+#include <nbl/builtin/hlsl/cpp_compat/vector.hlsl>
+#include <nbl/builtin/hlsl/cpp_compat/matrix.hlsl>
+#include <nbl/builtin/hlsl/type_traits.hlsl>
+
+
+#if (__cplusplus >= 202002L && __cpp_concepts)
+
+#define NBL_CONCEPT_TYPE_PARAMS(...) template <__VA_ARGS__>
+#define NBL_CONCEPT_SIGNATURE(NAME, ...) concept NAME = requires(__VA_ARGS__)
+#define NBL_CONCEPT_BODY(...) { __VA_ARGS__ };
+#define NBL_CONCEPT_ASSIGN(NAME, ...) concept NAME = __VA_ARGS__;
+#define NBL_REQUIRES(...) requires __VA_ARGS__ 
+
+#include <concepts>
+
+namespace nbl
+{
+namespace hlsl
+{
+namespace concepts
+{
+
+// Alias some of the std concepts in nbl. As this is C++20 only, we don't need to use
+// the macros here.
+template <typename T, typename U>
+concept same_as = std::same_as<T, U>;
+
+template <typename D, typename B>
+concept derived_from = std::derived_from<D, B>;
+
+template <typename F, typename T>
+concept convertible_to = std::convertible_to<F, T>;
+
+template <typename T, typename F>
+concept assignable_from = std::assignable_from<T, F>;
+
+template <typename T, typename U>
+concept common_with = std::common_with<T, U>;
+
+template <typename T>
+concept integral = std::integral<T>;
+
+template <typename T>
+concept signed_integral = std::signed_integral<T>;
+
+template <typename T>
+concept unsigned_integral = std::unsigned_integral<T>;
+
+template <typename T>
+concept floating_point = std::floating_point<T>;
+
+
+// Some other useful concepts.
+
+template<typename T, typename... Ts>
+concept any_of = (same_as<T, Ts> || ...);
+
+template <typename T>
+concept scalar = floating_point<T> || integral<T>;
+
+template <typename T>
+concept vectorial = is_vector<T>::value;
+
+template <typename T>
+concept matricial = is_matrix<T>::value;
+
+}
+}
+}
+
+#else
+
+// No C++20 support. Do nothing.
+#define NBL_CONCEPT_TYPE_PARAMS(...)
+#define NBL_CONCEPT_SIGNATURE(NAME, ...) 
+#define NBL_CONCEPT_BODY(...)
+#define NBL_REQUIRES(...)
+
+#endif
+
+#endif

src/nbl/builtin/CMakeLists.txt

@@ -243,6 +243,7 @@ LIST_BUILTIN_RESOURCE(NBL_RESOURCES_TO_EMBED "hlsl/spirv_intrinsics/subgroup_shu
 LIST_BUILTIN_RESOURCE(NBL_RESOURCES_TO_EMBED "hlsl/spirv_intrinsics/subgroup_vote.hlsl")
 #C++ compatibility
 LIST_BUILTIN_RESOURCE(NBL_RESOURCES_TO_EMBED "hlsl/cpp_compat.hlsl")
+LIST_BUILTIN_RESOURCE(NBL_RESOURCES_TO_EMBED "hlsl/cpp_compat/concepts.hlsl")
 LIST_BUILTIN_RESOURCE(NBL_RESOURCES_TO_EMBED "hlsl/cpp_compat/intrinsics.h")
 LIST_BUILTIN_RESOURCE(NBL_RESOURCES_TO_EMBED "hlsl/cpp_compat/matrix.hlsl")
 LIST_BUILTIN_RESOURCE(NBL_RESOURCES_TO_EMBED "hlsl/cpp_compat/promote.hlsl")