//
// Cforall Version 1.0.0 Copyright (C) 2015 University of Waterloo
//
// The contents of this file are covered under the licence agreement in the
// file "LICENCE" distributed with Cforall.
//
// XXX.cc -- 
//
// Author           : Richard C. Bilson
// Created On       : Mon May 18 07:44:20 2015
// Last Modified By : 
// Last Modified On : 
// Update Count     : 0
//
/*
 * This file is part of the Cforall project
 *
 * $Id: GenPoly.cc,v 1.4 2005/08/29 20:14:13 rcbilson Exp $
 *
 */

#include "GenPoly.h"
#include "SynTree/Type.h"

#include <iostream>
using namespace std;

namespace GenPoly {

// interface functions
bool isPolyVal( Type *type, const TyVarMap &tyVars ) {
  return isPolyVal( type, tyVars, false );
}

bool needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars ) {  
  return needsAdapter( adaptee, tyVars, false );
}

bool
isPolyVal( Type *type, const TyVarMap &tyVars, bool considerAllTyVars )
{
  if ( TypeInstType *typeInst = dynamic_cast< TypeInstType* >( type ) ) {
    if ( tyVars.find( typeInst->get_name() ) != tyVars.end() ) {
      return true;
    }
    return considerAllTyVars;
  }
  return false;
}

// A function needs an adapter if it returns a polymorphic value or if any of its
// parameters have polymorphic type
bool
needsAdapter( FunctionType *adaptee, const TyVarMap &tyVars, bool considerAllTyVars )
{
  bool needsAdapter = false;
  if ( ! adaptee->get_returnVals().empty() && isPolyVal( adaptee->get_returnVals().front()->get_type(), tyVars, considerAllTyVars ) ) {
    needsAdapter = true;
  }
  for ( std::list< DeclarationWithType* >::const_iterator innerArg = adaptee->get_parameters().begin(); ! needsAdapter && innerArg != adaptee->get_parameters().end(); ++innerArg ) {
    if ( isPolyVal( (*innerArg)->get_type(), tyVars, considerAllTyVars ) ) {
      needsAdapter = true;
    }
  }
  
  return needsAdapter;
}

void 
printTyVarMap( std::ostream &os, const TyVarMap &tyVarMap )
{
  for ( TyVarMap::const_iterator i = tyVarMap.begin(); i != tyVarMap.end(); ++i ) {
    os << i->first << " (" << i->second << ") ";
  }
  os << std::endl;
}

} // namespace GenPoly
// Local Variables: //
// tab-width: 4 //
// mode: c++ //
// compile-command: "make install" //
// End: //