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The CICA Windows Explosion!
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14
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ASSOC.H
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1995-02-23
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// File from page 614 in "Thinking in C++" by Bruce Eckel
//////////////////////////////////////////////////
// From the compressed package ECKELT01.ZIP 2/21/95
// Copyright (c) Bruce Eckel, 1995
// Source code file from the book "Thinking in C++",
// Prentice Hall, 1995, ISBN: 0-13-917709-4
// All rights reserved EXCEPT as allowed by the following
// statements: You may freely use this file for your own
// work, including modifications and distribution in
// executable form only. You may copy and distribute this
// file, as long as it is only distributed in the complete
// (compressed) package with the other files from this
// book and you do not remove this copyright and notice.
// You may not distribute modified versions of the source
// code in this package. This package may be freely placed
// on bulletin boards, internet nodes, shareware disks and
// product vendor disks. You may not use this file in
// printed media without the express permission of the
// author. Bruce Eckel makes no
// representation about the suitability of this software
// for any purpose. It is provided "as is" without express
// or implied warranty of any kind. The entire risk as to
// the quality and performance of the software is with
// you. Should the software prove defective, you assume
// the cost of all necessary servicing, repair, or
// correction.
// If you think you've found an error, please
// email all modified files with loudly commented changes
// to: eckel@aol.com (please use the same
// address for non-code errors found in the book).
//////////////////////////////////////////////////
//: ASSOC.H -- Associative array
#ifndef ASSOC_H_
#define ASSOC_H_
#include "..\14\set.h"
#include <assert.h>
template<class In, class Out>
class assoc_array {
set<In> inVal;
vector<Out> outVal;
int max;
// Prevent assignment & copy-construction:
void operator=(assoc_array&);
assoc_array(assoc_array&);
public:
assoc_array() : max(0) {}
Out& operator[](const In&);
int length() const { return max; }
In& in_value(int i) {
// No check for shipping application:
assert(i >= 0 && i < max);
return inVal[i];
}
Out& out_value(int i) {
assert(i >= 0 && i < max);
return *outVal[i];
}
};
template<class In, class Out> Out&
assoc_array<In,Out>::operator[](const In& in){
if(!inVal.contains(in)) {
inVal.add(in); // Copy-constructor
outVal[max] = new Out; // Default constr.
max++;
}
int x = inVal.index(in);
return *outVal[inVal.index(in)];
}
#endif // ASSOC_H_