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    <p>Perhaps something like:</p> <pre><code>template&lt;typename T&gt; struct register_struct { virtual void operator()() = 0; register_struct(); register_struct *pNext; }; template&lt;typename T&gt; struct registry { static register_struct&lt;T&gt; *chain; static void walk() { register_struct&lt;T&gt; *p = chain; while (p) { (*p)(); p = p-&gt;pNext; } } }; template&lt;typename T&gt; register_struct&lt;T&gt; *registry&lt;T&gt;::chain = NULL; template&lt;typename T&gt; register_struct&lt;T&gt;::register_struct() { pNext = registry&lt;T&gt;::chain; registry&lt;T&gt;::chain = this; } #define DECL_REGISTRY(name) \ struct tag_##name { } ; \ void name() { registry&lt;tag_##name&gt;::walk(); } #define JOIN_EXPAND(x, y) JOIN_EXPAND_2(x, y) #define JOIN_EXPAND_2(x, y) x ## y // Invoke REGISTER_PRINT at file scope! #define REGISTER_PRINT(name, text) \ namespace { \ static struct : public register_struct&lt;tag_##name&gt; { \ void operator()() { \ std::cout &lt;&lt; text &lt;&lt; std::endl; \ } \ } JOIN_EXPAND(rs_##name##_, __LINE__); \ } DECL_REGISTRY(foo); REGISTER_PRINT(foo, "hello") REGISTER_PRINT(foo, "world") int main() { foo(); return 0; } </code></pre> <p>This will fix the recursive instantiation issues, but you're still limited to one registration per line. However, since the registrations are at file scope, this should (hopefully!) be less of a problem.</p> <p>Note that this is unsafe to use if you expect to invoke these prior to <code>main()</code> - you must allow static constructors to complete before using it.</p>
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    1. POEliminating recursive template instantiation in C++
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    1. USbdonlan
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      1. VTUpMod
    1. COLike I said, I don't want static objects.
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      1. USAri
 

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