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// Copyright (c) 1996 David Engberg All rights reserved
// $Id: NonlocalBranch.h,v 1.1 1996/03/31 19:35:29 geppetto Exp $
#ifndef _NonlocalBranch_h
#define _NonlocalBranch_h
#pragma interface
#include "CompileContext.h"
//
// Class name : CNonlocalBranch
// Description : The nonlocal branch object encapsulates a non-structed
// branch from a deeper scope to a higher scope. For example, if you
// use 'break' in a switch or while body, you are generating one of these.
// This bundles two important pieces of information. The first is the
// location of the branch offset in the code body. The enclosing scope
// needs to know where the branch instruction is so that it can go back and
// insert the correct address for the code to jump to.
// The other piece of information is the compile context that was in use
// at the brach site. This is important because it needs to be merged with
// the context at the point where it branches to to correctly reflect the
// initialization of local variables, etc.
//
class CNonlocalBranch {
public:
CNonlocalBranch(unsigned long address, const CCompileContext& branchContext);
CNonlocalBranch(const CNonlocalBranch& source);
~CNonlocalBranch();
CNonlocalBranch& operator=(const CNonlocalBranch& source);
const CCompileContext& GetContext() const { return fContext; }
unsigned long GetAddress() const { return fBranchAddress; }
CNonlocalBranch();
bool operator==(const CNonlocalBranch& source) const;
bool operator<(const CNonlocalBranch& source) const;
private:
CCompileContext fContext;
unsigned long fBranchAddress;
};
#endif
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