template non-type argument in sgi stl's allocator
<p>There are two allocators in sgi stl. One is <code>__malloc_alloc_template&lt;0&gt;</code>, the other is <code>__default_alloc_template&lt;_NODE_ALLOCATOR_THREADS, 0&gt;</code>. Template non-type argument <code>__inst</code> is 0. what is this argument used for ? If it is always 0, why use template?</p>
