2020-03-02 20:47:43 +00:00
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// Copyright 2020 The Tint Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#ifndef SRC_AST_LITERAL_H_
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#define SRC_AST_LITERAL_H_
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#include <string>
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2020-03-27 00:45:34 +00:00
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#include "src/ast/type/type.h"
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2020-03-02 20:47:43 +00:00
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namespace tint {
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namespace ast {
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class BoolLiteral;
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class FloatLiteral;
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class NullLiteral;
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class SintLiteral;
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class UintLiteral;
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/// Base class for a literal value
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class Literal {
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public:
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virtual ~Literal();
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/// @returns true if this is a bool literal
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virtual bool IsBool() const;
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/// @returns true if this is a float literal
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virtual bool IsFloat() const;
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/// @returns thre if this is an int literal (either sint or uint)
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virtual bool IsInt() const;
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/// @returns true if this is a signed int literal
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virtual bool IsSint() const;
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/// @returns true if this is a null literal
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virtual bool IsNull() const;
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/// @returns true if this is a unsigned int literal
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virtual bool IsUint() const;
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/// @returns the literal as a boolean literal
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BoolLiteral* AsBool();
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/// @returns the literal as a float literal
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FloatLiteral* AsFloat();
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/// @returns the literal as a signed int literal
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SintLiteral* AsSint();
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/// @returns the literal as a null literal
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NullLiteral* AsNull();
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/// @returns the literal as a unsigned int literal
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UintLiteral* AsUint();
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/// @returns the type of the literal
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ast::type::Type* type() const { return type_; }
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/// @returns the literal as a string
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virtual std::string to_str() const = 0;
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/// @returns the name for this literal. This name is unique to this value.
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virtual std::string name() const = 0;
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protected:
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/// Constructor
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/// @param type the type of the literal
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explicit Literal(ast::type::Type* type);
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private:
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ast::type::Type* type_ = nullptr;
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};
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} // namespace ast
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} // namespace tint
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#endif // SRC_AST_LITERAL_H_
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