Download Class Template Specialization - Object Oriented Programming - Lecture Slides and more Slides Object Oriented Programming in PDF only on Docsity! Object-Oriented Programming (OOP) Lecture No. 35 Docsity.com Member Templates • A class or class template can have member functions that are themselves templates Docsity.com Because class Complex<double> { double real, imag; public: Complex( double r, double im ) : real(r), imag(im) {} Complex(const Complex<double>& c) : real( c.real ), imag( c.imag ) {} … }; Docsity.com …Member Templates template<typename T> class Complex { T real, imag; public: Complex( T r, T im ) : real(r), imag(im) {} template <typename U> Complex(const Complex<U>& c) : real( c.real ), imag( c.imag ) {} … }; Docsity.com …Member Templates int main() { Complex< float > fc( 0, 0 ); Complex< double > dc = fc; // OK return 0; } Docsity.com Class Template Specialization • Like function templates, a class template may not handle all the types successfully • Explicit specializations are provided to handle such types Docsity.com …Class Template Specialization int main() { Vector< int > iv1( 2 ); iv1[0] = 15; iv1[1] = 27; Vector< int > iv2( iv1 ); Vector< int > iv3( 2 ); iv3 = iv1; return 0; } Docsity.com …Class Template Specialization int main() { Vector< char* > sv1( 2 ); sv1[0] = "Aamir"; sv1[1] = "Nasir"; Vector< char* > sv2( sv1 ); Vector< char* > sv3( 2 ); sv3 = sv1; return 0; } Docsity.com …Class Template Specialization template<> Vector<char*>::Vector(int s) { size = s; if ( size != 0 ) { ptr = new char*[size]; for (int i = 0; i < size; i++) ptr[i] = 0; } else ptr = 0; } Docsity.com …Class Template Specialization template<> Vector< char* >::Vector( const Vector<char*>& copy ) { size = copy.getSize(); if ( size == 0 ) { ptr = 0; return; } Docsity.com …Class Template Specialization ptr = new char*[size]; for (int i = 0; i < size; i++) if ( copy.ptr[i] != 0 ) { ptr[i] = new char[ strlen( copy.ptr[i] ) + 1 ]; strcpy(ptr[i], copy.ptr[i]); } else ptr[i] = 0; } Docsity.com …Class Template Specialization template<> const Vector<char*>& Vector<char*>:: operator=(const Vector<char*>& right) { if ( this == &right ) return *this; for (int i = 0; i < size; i++) delete [] ptr[i]; delete [] ptr; Docsity.com …Class Template Specialization size = right.size; if ( size == 0 ) { ptr = 0; return *this; } ptr = new char*[size]; Docsity.com …Class Template Specialization for (int i = 0; i < size; i++) if ( right.ptr[i] != 0 ) { ptr[i] = new char[strlen( right.ptr[i] ) + 1]; strcpy( ptr[i], right.ptr[i] ); } else ptr[i] = 0; } Docsity.com
