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POC++ resizing array using generics / templates
 

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  1. POC++ resizing array using generics / templates
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    <p>We have just been introduced to generics and templates in my comp sci class. I have been asked to create a generic container class that supports storage and retrieval of any data type. I have all of my functions working okay, except when it comes to resize my array. I have the call for resize inside my insert function:</p> <pre><code>template&lt; typename T &gt; void Container&lt; T &gt;::insert( T magic) { if (index == size) { resize(); } containerPtr[index] = magic; index++; } </code></pre> <p>The size variable is the size of the array and the index is the next insert location.</p> <p>and here is my resize function:</p> <pre><code>template&lt; typename T &gt; void Container&lt; T &gt;::resize() { int doubSize = size * 2; Container&lt; T &gt; temp(doubSize); for (int i = 0; i &lt; size; i++) { temp[i] = containerPtr[i]; // error 1 here } *containerPtr = temp; // error 2 here size = doubSize; } </code></pre> <p>My overloaded =</p> <pre><code>template&lt; typename T &gt; const T Container&lt; T &gt;::operator=(const T&amp; rhs) { if(this == &amp;rhs) { return *this; } return *rhs; } </code></pre> <p>I receive the following errors when I try to compile:</p> <pre><code>1: error C2676: binary '[': 'Container&lt;T&gt;' does not define this operator or a conversion to a type acceptable to the predefined operator 2: error C2679: binary '=': no operator found which takes a right-hand operand of type 'Container&lt;T&gt;' (or there is no acceptable conversion) </code></pre> <p>I am not sure where I am going wrong here...</p>
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    1. COfirst of all = is assigment operator and you do not assign anything. 2. dereference this on return statement. 3. reallocate the storage.... 4. delete second for loop, etc.
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    2. COWhat is `containerPtr`?
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    3. COhttp://courses.cms.caltech.edu/cs11/material/cpp/donnie/cpp-ops.html
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