91 lines
2.5 KiB
C++
91 lines
2.5 KiB
C++
// Copyright (C) 2020 Jérôme Leclercq
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// This file is part of the "Nazara Engine - Shader generator"
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// For conditions of distribution and use, see copyright notice in Config.hpp
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#pragma once
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#ifndef NAZARA_SHADERAST_TRANSFORMVISITOR_HPP
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#define NAZARA_SHADERAST_TRANSFORMVISITOR_HPP
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#include <Nazara/Prerequisites.hpp>
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#include <Nazara/Shader/Config.hpp>
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#include <Nazara/Shader/ShaderAstCloner.hpp>
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#include <vector>
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namespace Nz::ShaderAst
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{
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class NAZARA_SHADER_API TransformVisitor : AstCloner
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{
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public:
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inline TransformVisitor();
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TransformVisitor(const TransformVisitor&) = delete;
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TransformVisitor(TransformVisitor&&) = delete;
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~TransformVisitor() = default;
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StatementPtr Transform(StatementPtr& statement);
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TransformVisitor& operator=(const TransformVisitor&) = delete;
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TransformVisitor& operator=(TransformVisitor&&) = delete;
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private:
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struct Identifier;
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ExpressionPtr Clone(AccessMemberIdentifierExpression& node) override;
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ExpressionPtr Clone(CastExpression& node) override;
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ExpressionPtr Clone(IdentifierExpression& node) override;
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ExpressionPtr CloneExpression(ExpressionPtr& expr) override;
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inline const Identifier* FindIdentifier(const std::string_view& identifierName) const;
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void PushScope();
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void PopScope();
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inline std::size_t RegisterFunction(std::string name);
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inline std::size_t RegisterStruct(std::string name, StructDescription description);
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inline std::size_t RegisterVariable(std::string name);
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ExpressionType ResolveType(const ExpressionType& exprType);
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using AstCloner::Visit;
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void Visit(BranchStatement& node) override;
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void Visit(ConditionalStatement& node) override;
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void Visit(DeclareExternalStatement& node) override;
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void Visit(DeclareFunctionStatement& node) override;
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void Visit(DeclareStructStatement& node) override;
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void Visit(DeclareVariableStatement& node) override;
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void Visit(MultiStatement& node) override;
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struct Alias
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{
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std::variant<ExpressionType> value;
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};
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struct Struct
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{
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std::size_t structIndex;
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};
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struct Variable
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{
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std::size_t varIndex;
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};
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struct Identifier
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{
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std::string name;
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std::variant<Alias, Struct, Variable> value;
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};
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private:
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std::size_t m_nextFuncIndex;
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std::size_t m_nextVarIndex;
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std::vector<Identifier> m_identifiersInScope;
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std::vector<StructDescription> m_structs;
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std::vector<std::size_t> m_scopeSizes;
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};
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}
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#include <Nazara/Shader/Ast/TransformVisitor.inl>
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#endif
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