Rework shader AST (WIP)

include/Nazara/Shader/ShaderAstCache.hpp

@@ -0,0 +1,48 @@
+// Copyright (C) 2020 Jérôme Leclercq
+// This file is part of the "Nazara Engine - Shader generator"
+// For conditions of distribution and use, see copyright notice in Config.hpp
+
+#pragma once
+
+#ifndef NAZARA_SHADERASTCACHE_HPP
+#define NAZARA_SHADERASTCACHE_HPP
+
+#include <Nazara/Prerequisites.hpp>
+#include <Nazara/Shader/Config.hpp>
+#include <Nazara/Shader/ShaderAstExpressionType.hpp>
+#include <Nazara/Utility/Enums.hpp>
+
+namespace Nz::ShaderAst
+{
+	struct AstCache
+	{
+		struct Variable
+		{
+			ShaderExpressionType type;
+		};
+
+		struct Identifier
+		{
+			std::string name;
+			std::variant<Variable, StructDescription> value;
+		};
+
+		struct Scope
+		{
+			std::optional<std::size_t> parentScopeIndex;
+			std::vector<Identifier> identifiers;
+		};
+
+		inline const Identifier* FindIdentifier(std::size_t startingScopeId, const std::string& identifierName) const;
+		inline std::size_t GetScopeId(const Node* node) const;
+
+		ShaderStageType stageType = ShaderStageType::Undefined;
+		std::unordered_map<const Expression*, ShaderExpressionType> nodeExpressionType;
+		std::unordered_map<const Node*, std::size_t> scopeIdByNode;
+		std::vector<Scope> scopes;
+	};
+}
+
+#include <Nazara/Shader/ShaderAstCache.inl>
+
+#endif