source: src/SynTree/Initializer.h @ 1f44196

//
// 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.
//
// Initializer.h --
//
// Author           : Richard C. Bilson
// Created On       : Mon May 18 07:44:20 2015
// Last Modified By : Rob Schluntz
// Last Modified On : Tue Apr 12 13:49:13 2016
// Update Count     : 19
//

#ifndef INITIALIZER_H
#define INITIALIZER_H

#include "SynTree.h"
#include "Visitor.h"
#include "Mutator.h"
#include "Type.h"

#include <cassert>

const std::list<Expression*> noDesignators;

// Initializer: base class for object initializers (provide default values)
class Initializer {
  public:
        //      Initializer( std::string _name = std::string(""), int _pos = 0 );
        Initializer( bool maybeConstructed );
        Initializer( const Initializer & other );
        virtual ~Initializer();

        static std::string designator_name( Expression *designator );

        //      void set_name( std::string newValue ) { name = newValue; }
        //      std::string get_name() const { return name; }

        //      void set_pos( int newValue ) { pos = newValue; }
        //      int get_pos() const { return pos; }
        virtual void set_designators( std::list<Expression *> & ) { assert(false); }
        virtual std::list<Expression *> &get_designators() {
                assert(false);
                std::list<Expression *> *ret = 0; return *ret;  // never reached
        }

        bool get_maybeConstructed() { return maybeConstructed; }

        virtual Initializer *clone() const = 0;
        virtual void accept( Visitor &v ) = 0;
        virtual Initializer *acceptMutator( Mutator &m ) = 0;
        virtual void print( std::ostream &os, int indent = 0 );
  private:
        //      std::string name;
        //      int pos;
        bool maybeConstructed;
};

// SingleInit represents an initializer for a common object (e.g., int x = 4)
class SingleInit : public Initializer {
  public:
        SingleInit( Expression *value, const std::list< Expression *> &designators = std::list< Expression * >(), bool maybeConstructed = false );
        SingleInit( const SingleInit &other );
        virtual ~SingleInit();

        Expression *get_value() { return value; }
        void set_value( Expression *newValue ) { value = newValue; }

        void set_designators( std::list<Expression *> &newValue ) { designators = newValue; }
        std::list<Expression *> &get_designators() { return designators; }

        virtual SingleInit *clone() const { return new SingleInit( *this); }
        virtual void accept( Visitor &v ) { v.visit( this ); }
        virtual Initializer *acceptMutator( Mutator &m ) { return m.mutate( this ); }
        virtual void print( std::ostream &os, int indent = 0 );
  private:
        //Constant *value;
        Expression *value;      // has to be a compile-time constant
        std::list< Expression * > designators;
};

// ListInit represents an initializer that is composed recursively of a list of initializers; this is used to initialize
// an array or aggregate
class ListInit : public Initializer {
  public:
        ListInit( const std::list<Initializer*> &initializers,
                          const std::list<Expression *> &designators = std::list< Expression * >(), bool maybeConstructed = false );
        virtual ~ListInit();

        void set_designators( std::list<Expression *> &newValue ) { designators = newValue; }
        std::list<Expression *> &get_designators() { return designators; }
        void set_initializers( std::list<Initializer*> &newValue ) { initializers = newValue; }
        std::list<Initializer*> &get_initializers() { return initializers; }

        typedef std::list<Initializer*>::iterator iterator;
        iterator begin() { return initializers.begin(); }
        iterator end() { return initializers.end(); }

        virtual ListInit *clone() const { return new ListInit( *this ); }
        virtual void accept( Visitor &v ) { v.visit( this ); }
        virtual Initializer *acceptMutator( Mutator &m ) { return m.mutate( this ); }
        virtual void print( std::ostream &os, int indent = 0 );
  private:
        std::list<Initializer*> initializers;  // order *is* important
        std::list<Expression *> designators;
};

// ConstructorInit represents an initializer that is either a constructor expression or
// a C-style initializer.
class ConstructorInit : public Initializer {
  public:
        ConstructorInit( Statement * ctor, Statement * dtor, Initializer * init );
        ConstructorInit( const ConstructorInit &other );
        virtual ~ConstructorInit();

        void set_ctor( Statement * newValue ) { ctor = newValue; }
        Statement * get_ctor() const { return ctor; }
        void set_dtor( Statement * newValue ) { dtor = newValue; }
        Statement * get_dtor() const { return dtor; }
        void set_init( Initializer * newValue ) { init = newValue; }
        Initializer * get_init() const { return init; }

        ConstructorInit *clone() const { return new ConstructorInit( *this ); }
        virtual void accept( Visitor &v ) { v.visit( this ); }
        virtual Initializer *acceptMutator( Mutator &m ) { return m.mutate( this ); }
        virtual void print( std::ostream &os, int indent = 0 );

  private:
        Statement * ctor;
        Statement * dtor;
        // C-style initializer made up of SingleInit and ListInit nodes to use as a fallback
        // if an appropriate constructor definition is not found by the resolver
        Initializer * init;
};

std::ostream & operator<<( std::ostream & out, Initializer * init );

#endif // INITIALIZER_H

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