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POWhen creating a custom map class in c++ how to define and use a comparator in the template
 

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  1. POWhen creating a custom map class in c++ how to define and use a comparator in the template
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    <p>I'm creating a container that works like the STL using an array. One thing I am stuck on is how to implement a comparator object to the template </p> <pre><code>template &lt;typename K, typename V, typename KeyEqual = myEqualObject&lt;K&gt; &gt; class Map { ...... } </code></pre> <p>would that template header need to be repeated on all method bodies outside of the class ? i.e</p> <pre><code>template &lt;typename K, typename V &gt; V&amp; Map&lt;K,V&gt;::operator[] (K key) { ... } </code></pre> <p>should be </p> <pre><code>template &lt;typename K, typename V, typename KeyEqual = myEqualObject&lt;K&gt; &gt; V&amp; Map&lt;K,V&gt;::operator[] (K key) { ... } </code></pre> <p>Also I am struggling with how to use/implement this extra object in my class to check if two key values are the same. Can anyone shed any light ?</p> <p>I have looked around this subject but cannot find any examples in this context </p>
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    1. USuser1652319
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    1. COIs this a toy project? If not, you really should be just using the actual Standard Library, and not building this stuff yourself.
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      1. USJohn Dibling
 

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