LispString.h

   1 #if !defined(H_LISPSTRING)
   2 #define H_LISPSTRING
   3
   4 namespace Lisp
   5 {
   6         class String;
   7
   8         class String : public Obj
   9         {
  10         public:
  11
  12                 typedef String* StringPtr;
  13                 typedef String& StringRef;
  14
  15                 String() : value_("")
  16                 {};
  17
  18                 String( const String& other )
  19                 {
  20                         if (this != &other)
  21                                 value_ = other.value_;
  22                 }
  23
  24                 virtual eObjectType getObjectType() const
  25                 {
  26                         return eStringObj;
  27                 }
  28
  29                 virtual String* create(void) const
  30                 {
  31                         StringPtr result = new String();
  32                         return result;
  33                 }
  34
  35                 virtual String* clone() const
  36                 {
  37                         StringPtr result = new String(*this);
  38                 }
  39
  40                 void print(std::ostream& out) const
  41                 {
  42                         out << "\"" << value_ << "\"";
  43                 }
  44
  45                 bool operator==(const Obj* other)
  46                 {
  47                         bool result = false;
  48                         if (other->getObjectType() == eStringObj)
  49                                 result = ( value_ == dynamic_cast<const String*>(other)->value_ );
  50                         return result;
  51                 }
  52         private:
  53                 StringValue value_;
  54         };
  55 }
  56
  57 #endif