80 lines
2.1 KiB
C++
80 lines
2.1 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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#include <Nazara/Shader/ShaderAstUtils.hpp>
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#include <Nazara/Shader/Debug.hpp>
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namespace Nz::ShaderAst
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{
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ExpressionCategory ShaderAstValueCategory::GetExpressionCategory(Expression& expression)
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{
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expression.Visit(*this);
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return m_expressionCategory;
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}
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void ShaderAstValueCategory::Visit(AccessMemberIdentifierExpression& node)
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{
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node.structExpr->Visit(*this);
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}
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void ShaderAstValueCategory::Visit(AccessMemberIndexExpression& node)
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{
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node.structExpr->Visit(*this);
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}
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void ShaderAstValueCategory::Visit(AssignExpression& /*node*/)
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{
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m_expressionCategory = ExpressionCategory::RValue;
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}
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void ShaderAstValueCategory::Visit(BinaryExpression& /*node*/)
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{
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m_expressionCategory = ExpressionCategory::RValue;
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}
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void ShaderAstValueCategory::Visit(CastExpression& /*node*/)
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{
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m_expressionCategory = ExpressionCategory::RValue;
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}
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void ShaderAstValueCategory::Visit(ConditionalExpression& node)
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{
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node.truePath->Visit(*this);
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ExpressionCategory trueExprCategory = m_expressionCategory;
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node.falsePath->Visit(*this);
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ExpressionCategory falseExprCategory = m_expressionCategory;
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if (trueExprCategory == ExpressionCategory::RValue || falseExprCategory == ExpressionCategory::RValue)
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m_expressionCategory = ExpressionCategory::RValue;
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else
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m_expressionCategory = ExpressionCategory::LValue;
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}
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void ShaderAstValueCategory::Visit(ConstantExpression& /*node*/)
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{
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m_expressionCategory = ExpressionCategory::RValue;
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}
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void ShaderAstValueCategory::Visit(IdentifierExpression& /*node*/)
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{
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m_expressionCategory = ExpressionCategory::LValue;
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}
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void ShaderAstValueCategory::Visit(IntrinsicExpression& /*node*/)
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{
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m_expressionCategory = ExpressionCategory::RValue;
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}
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void ShaderAstValueCategory::Visit(SwizzleExpression& node)
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{
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node.expression->Visit(*this);
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}
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void ShaderAstValueCategory::Visit(VariableExpression& node)
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{
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m_expressionCategory = ExpressionCategory::LValue;
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}
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}
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