109 lines
2.5 KiB
C
109 lines
2.5 KiB
C
// Build don't link:
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// GROUPS passed visibility
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// visibility file
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// From: dinh@cs.ucla.edu (Dinh Le)
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// Date: Mon, 12 Jul 93 22:21:06 -0700
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// Subject: class, template and their scoping problem
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// Message-ID: <9307130521.AA18312@oahu.cs.ucla.edu>
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#include <iostream.h>
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#include <assert.h>
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// --------------- Array.h && Array.cc ------------------
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const int ArraySize = 12;
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template <class Type>
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class Array { // ERROR - .struct Array_RC redecl.*
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friend class Array_RC;
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public:
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Array(const Type *ar, int sz) { init(ar,sz); }
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virtual ~Array() { delete [] ia; }
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virtual void print(ostream& = cout);
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virtual Type& operator[](int ix) { return ia[ix]; }
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private:
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void init(const Type*, int);
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int size;
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int *ia;
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};
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template <class Type>
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ostream& operator<<( ostream& os, Array<Type>& ar )
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{
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ar.print(os);
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return os;
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}
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template <class Type>
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void Array<Type>::print(ostream& os)
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{
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const int lineLength = 12;
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os << "( " << size << " )< ";
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for (int ix = 0; ix < size; ++ix) {
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if (ix % lineLength == 0 && ix) os << "\n\t";
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os << ia[ ix ];
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if (ix % lineLength != lineLength-1 &&
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ix != size-1)
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os << ", ";
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}
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os << " >\n";
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}
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template <class Type>
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void Array<Type>::init(const Type *array, int sz)
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{
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ia = new Type[size = sz];
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for (int ix = 0; ix < size; ++ix)
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ia[ix] = (array!=0) ? array[ix] : (Type)0;
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}
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// --------------- Array_RC.h && Array_RC.cc ----------------
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template <class Type>
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class Array_RC : public Array<Type> {// ERROR - previous declaration.*
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public:
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Array_RC(const Type *ar, int sz);
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Type& operator[](int ix);
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};
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template <class Type>
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Array_RC<Type>::Array_RC(const Type *ar, int sz) : Array<Type>(ar, sz) {}
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template <class Type>
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Type &Array_RC<Type>::operator[](int ix) {
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assert(ix >= 0 && ix < size);// ERROR - member .size.*
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return ia[ix];// ERROR - member .ia.*
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}
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// ------------------- Test routine ----------------------
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template <class Type>
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void try_array( Array<Type> &iA )
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{
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cout << "try_array: initial array values:\n";
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cout << iA << endl;
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}
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template <class Type>
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inline void
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try_array( Array_RC<Type> &rc )
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{
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try_array( ((Array<Type>&)rc) );
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}
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int main()
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{
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static int ia[10] = { 12, 7, 14, 9, 128, 17, 6, 3, 27, 5 };
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Array_RC<int> iA(ia, 10);// ERROR - instantiated from here
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cout << "template Array_RC class" << endl;
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try_array(iA);
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return 0;
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}
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template class Array_RC<int>;
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