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// Copyright 2021 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef SRC_SEM_EXPRESSION_H_
#define SRC_SEM_EXPRESSION_H_
#include "src/ast/expression.h"
#include "src/sem/behavior.h"
#include "src/sem/constant.h"
#include "src/sem/node.h"
namespace tint {
namespace sem {
// Forward declarations
class Statement;
class Type;
/// Expression holds the semantic information for expression nodes.
class Expression : public Castable<Expression, Node> {
public:
/// Constructor
/// @param declaration the AST node
/// @param type the resolved type of the expression
/// @param statement the statement that owns this expression
/// @param constant the constant value of the expression. May be invalid
Expression(const ast::Expression* declaration,
const sem::Type* type,
const Statement* statement,
Constant constant);
/// Destructor
~Expression() override;
/// @returns the AST node
const ast::Expression* Declaration() const { return declaration_; }
/// @return the resolved type of the expression
const sem::Type* Type() const { return type_; }
/// @return the statement that owns this expression
const Statement* Stmt() const { return statement_; }
/// @return the constant value of this expression
const Constant& ConstantValue() const { return constant_; }
/// @return the behaviors of this statement
const sem::Behaviors& Behaviors() const { return behaviors_; }
/// @return the behaviors of this statement
sem::Behaviors& Behaviors() { return behaviors_; }
protected:
/// The AST expression node for this semantic expression
const ast::Expression* const declaration_;
private:
const sem::Type* const type_;
const Statement* const statement_;
const Constant constant_;
sem::Behaviors behaviors_{sem::Behavior::kNext};
};
} // namespace sem
} // namespace tint
#endif // SRC_SEM_EXPRESSION_H_