// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
//
// 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 COMPILER_PREPROCESSOR_DIRECTIVE_HANDLER_H_
#define COMPILER_PREPROCESSOR_DIRECTIVE_HANDLER_H_

#include <string>

namespace pp
{

struct SourceLocation;

// Base class for handling directives.
// Preprocessor uses this class to notify the clients about certain
// preprocessor directives. Derived classes are responsible for
// handling them in an appropriate manner.
class DirectiveHandler
{
public:
	virtual ~DirectiveHandler();

	virtual void handleError(const SourceLocation& loc,
	                         const std::string& msg) = 0;

	// Handle pragma of form: #pragma name[(value)]
	virtual void handlePragma(const SourceLocation& loc,
	                          const std::string& name,
	                          const std::string& value) = 0;

	virtual void handleExtension(const SourceLocation& loc,
	                             const std::string& name,
	                             const std::string& behavior) = 0;

	virtual void handleVersion(const SourceLocation& loc,
	                           int version) = 0;
};

}  // namespace pp
#endif  // COMPILER_PREPROCESSOR_DIRECTIVE_HANDLER_H_