Program Listing for File Phi.h

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// $Id: Phi.h,v 1.1 2004/07/07 10:26:34 dquinlan Exp $
// -*-C++-*-
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// Best seen in 120-column wide window (or print in landscape mode).
//--------------------------------------------------------------------------------------------------------------------
// This file is part of Mint.
// Arun Chauhan (achauhan@cs.rice.edu), Dept of Computer Science, Rice University, 2001.
//--------------------------------------------------------------------------------------------------------------------

#ifndef PHI_H
#define PHI_H

//--------------------------------------------------------------------------------------------------------------------
// STL headers
#include <map>

// OpenAnalysis headers
#include <OpenAnalysis/CFG/CFG.h>
//--------------------------------------------------------------------------------------------------------------------


//--------------------------------------------------------------------------------------------------------------------
class Phi {
public:
  Phi (const SymHandle& var_name, CFG* _cfg) { sym = var_name; cfg = _cfg; }
  ~Phi () {}
  void dump (ostream&);
  void add_arg (CFG::Node* c_n, LeafHandle a_n) { args[c_n] = a_n; }
  LeafHandle arg (CFG::Node* n) { return args[n]; }
  int num_args () { return args.size(); }

  //------------------------------------------------------------------------------------------------------------------
  class ArgIterator : public Iterator {
  public:
    ArgIterator (Phi& p) { center = &p; iter = center->args.begin(); }
    void operator++ () { ++iter; }
    operator bool () { return (iter != center->args.end()); }
    operator CFG::Node* () { return (*iter).first; }
    operator LeafHandle () { return (*iter).second; }
  private:
    std::map<CFG::Node*, LeafHandle>::iterator iter;
    Phi* center;
  };
  friend class ArgIterator;
  //------------------------------------------------------------------------------------------------------------------

private:
  std::map<CFG::Node*, LeafHandle> args;
  SymHandle sym;
  CFG* cfg;
};
//--------------------------------------------------------------------------------------------------------------------

#endif