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// Copyright 2020 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_AST_LITERAL_H_
#define SRC_AST_LITERAL_H_
#include <string>
#include "src/ast/type/type.h"
namespace tint {
namespace ast {
class BoolLiteral;
class FloatLiteral;
class IntLiteral;
class NullLiteral;
class UintLiteral;
/// Base class for a literal value
class Literal {
public:
virtual ~Literal();
/// @returns true if this is a bool literal
virtual bool IsBool() const;
/// @returns true if this is a float literal
virtual bool IsFloat() const;
/// @returns true if this is a signed int literal
virtual bool IsInt() const;
/// @returns true if this is a null literal
virtual bool IsNull() const;
/// @returns true if this is a unsigned int literal
virtual bool IsUint() const;
/// @returns the literal as a boolean literal
BoolLiteral* AsBool();
/// @returns the literal as a float literal
FloatLiteral* AsFloat();
/// @returns the literal as a int literal
IntLiteral* AsInt();
/// @returns the literal as a null literal
NullLiteral* AsNull();
/// @returns the literal as a unsigned int literal
UintLiteral* AsUint();
/// @returns the type of the literal
ast::type::Type* type() const { return type_; }
/// @returns the literal as a string
virtual std::string to_str() const = 0;
/// @returns the name for this literal. This name is unique to this value.
virtual std::string name() const = 0;
protected:
/// Constructor
/// @param type the type of the literal
explicit Literal(ast::type::Type* type);
private:
ast::type::Type* type_ = nullptr;
};
} // namespace ast
} // namespace tint
#endif // SRC_AST_LITERAL_H_