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POError when resizing vector of template object
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  1. POError when resizing vector of template object
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    copied!<p>I am trying to create a vector of vector of a template object. The error occurs when I try to resize the inner vector and I can't make heads or tail of the error message. I don't know where it gets the HashTable::Item::Item from. Any suggestions?</p> <blockquote> <p>/usr/include/c++/4.4.6/bits/stl_vector.h(552): error: no instance of constructor "HashTable::Item::Item [with Key=int, Value=Varvalue]" matches the argument list resize(size_type __new_size, value_type __x = value_type())</p> <pre><code> detected during: instantiation of "void std::vector&lt;_Tp, _Alloc&gt;::resize(std::vector&lt;_Tp, _Alloc&gt;::size_type={size_t={unsigned long}}, std::vector&lt;_Tp, _Alloc&gt;::value_type) [with _Tp=HashTable&lt;int, Varvalue&gt;::Item, _Alloc=std::allocator&lt;HashTable&lt;int, Varvalue&gt;::Item&gt;]" at line 118 of "main.cc" </code></pre> </blockquote> <p>Here is the relevant code:</p> <p><pre>#define VECLEN 16 class Varvalue { public: char data[32]; };</p> <p>template class HashTable { private: class Item { public: bool valid; Key key; Value value; Item *next;<br> Item(const Key k, const Value v, Item *b = 0, bool val = true): key(k), value(v), next(b), valid(val) {} };</p> <pre><code>vector&lt;vector&lt;Item&gt; &gt; table; int tableSize; HashTable(const int s): tableSize(s) { table.resize(tableSize); for(int i=0; i&lt;table.size(); i++) table[i].resize(VECLEN); // &lt;&lt;-- error line 118 } </code></pre> <p>}</p> <code>int main() { HashTable&lt;int, Varvalue&gt; htable(nkeys); } </code></pre>
 

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