weex_core/Source/include/JavaScriptCore/dfg/DFGTransition.h

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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.
 */
#pragma once

#if ENABLE(DFG_JIT)

#include "DFGRegisteredStructure.h"
#include <wtf/PrintStream.h>
#include <wtf/Vector.h>

namespace JSC {

class Structure;
struct DumpContext;

namespace DFG {

struct Transition {
    RegisteredStructure previous;
    RegisteredStructure next;
    
    Transition() = default;
    
    Transition(RegisteredStructure previous, RegisteredStructure next)
        : previous(previous)
        , next(next)
    {
    }
    
    void dumpInContext(PrintStream&, DumpContext*) const;
    void dump(PrintStream&) const;
};

typedef Vector<Transition, 3> TransitionVector;

} } // namespace JSC::DFG

#endif // ENABLE(DFG_JIT)