Shader: Move DependencyChecker to a public class

include/Nazara/Shader/Ast/DependencyCheckerVisitor.hpp

@@ -0,0 +1,66 @@
+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Shader module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_SHADER_AST_DEPENDENCYCHECKERVISITOR_HPP
+#define NAZARA_SHADER_AST_DEPENDENCYCHECKERVISITOR_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Core/Bitset.hpp>
+#include <Nazara/Shader/Config.hpp>
+#include <Nazara/Shader/Ast/AstRecursiveVisitor.hpp>
+
+namespace Nz::ShaderAst
+{
+	class NAZARA_SHADER_API DependencyCheckerVisitor : public AstRecursiveVisitor
+	{
+		public:
+			struct UsageSet;
+
+			DependencyCheckerVisitor() = default;
+			DependencyCheckerVisitor(const DependencyCheckerVisitor&) = delete;
+			DependencyCheckerVisitor(DependencyCheckerVisitor&&) = delete;
+			~DependencyCheckerVisitor() = default;
+
+			inline const UsageSet& GetUsage() const;
+
+			inline void Resolve();
+
+			using AstRecursiveVisitor::Visit;
+
+			void Visit(CallFunctionExpression& node) override;
+			void Visit(VariableExpression& node) override;
+
+			void Visit(DeclareExternalStatement& node) override;
+			void Visit(DeclareFunctionStatement& node) override;
+			void Visit(DeclareStructStatement& node) override;
+			void Visit(DeclareVariableStatement& node) override;
+
+			DependencyCheckerVisitor& operator=(const DependencyCheckerVisitor&) = delete;
+			DependencyCheckerVisitor& operator=(DependencyCheckerVisitor&&) = delete;
+
+			struct UsageSet
+			{
+				Bitset<> usedFunctions;
+				Bitset<> usedStructs;
+				Bitset<> usedVariables;
+			};
+
+		private:
+			void Resolve(const UsageSet& usageSet);
+
+			std::optional<std::size_t> m_currentFunctionIndex;
+			std::optional<std::size_t> m_currentVariableDeclIndex;
+			std::unordered_map<std::size_t, UsageSet> m_functionUsages;
+			std::unordered_map<std::size_t, UsageSet> m_structUsages;
+			std::unordered_map<std::size_t, UsageSet> m_variableUsages;
+			UsageSet m_globalUsage;
+			UsageSet m_resolvedUsage;
+	};
+}
+
+#include <Nazara/Shader/Ast/DependencyCheckerVisitor.inl>
+
+#endif // NAZARA_SHADER_AST_DEPENDENCYCHECKERVISITOR_HPP

include/Nazara/Shader/Ast/DependencyCheckerVisitor.inl

@@ -0,0 +1,21 @@
+// Copyright (C) 2022 Jérôme "Lynix" Leclercq (lynix680@gmail.com)
+// This file is part of the "Nazara Engine - Shader module"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#include <Nazara/Shader/Ast/DependencyCheckerVisitor.hpp>
+#include <Nazara/Shader/Debug.hpp>
+
+namespace Nz::ShaderAst
+{
+	inline auto DependencyCheckerVisitor::GetUsage() const -> const UsageSet&
+	{
+		return m_resolvedUsage;
+	}
+
+	void DependencyCheckerVisitor::Resolve()
+	{
+		Resolve(m_globalUsage);
+	}
+}
+
+#include <Nazara/Shader/DebugOff.hpp>