text: /*
   * Copyright (C) 2016 Apple Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   *
   * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
   * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
   * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
   * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
   * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
   * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #pragma once
  
  #include "ExceptionScope.h"
  
  namespace JSC {
      
  #if ENABLE(EXCEPTION_SCOPE_VERIFICATION)
      
  // If a function can clear JS exceptions, it should declare a CatchScope at the
  // top of the function (as early as possible) using the DECLARE_CATCH_SCOPE macro.
  // Declaring a CatchScope in a function means that the function intends to clear
  // pending exceptions before returning to its caller.
      
  class CatchScope : public ExceptionScope {
  public:
      JS_EXPORT_PRIVATE CatchScope(VM&, ExceptionEventLocation);
      CatchScope(const CatchScope&) = delete;
      CatchScope(CatchScope&&) = default;
  
      JS_EXPORT_PRIVATE ~CatchScope();
  
      void clearException() { m_vm.clearException(); }
  };
  
  #define DECLARE_CATCH_SCOPE(vm__) \
      JSC::CatchScope((vm__), JSC::ExceptionEventLocation(__FUNCTION__, __FILE__, __LINE__))
  
  #else // not ENABLE(EXCEPTION_SCOPE_VERIFICATION)
  
  class CatchScope : public ExceptionScope {
  public:
      ALWAYS_INLINE CatchScope(VM& vm)
          : ExceptionScope(vm)
      { }
      CatchScope(const CatchScope&) = delete;
      CatchScope(CatchScope&&) = default;
  
      ALWAYS_INLINE void clearException() { m_vm.clearException(); }
  };
  
  #define DECLARE_CATCH_SCOPE(vm__) \
      JSC::CatchScope((vm__))
  
  #endif // ENABLE(EXCEPTION_SCOPE_VERIFICATION)
  
  } // namespace JSC
  