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    <p>In general compilers are not aggressive at inlining calls through function pointers, even when they are known at compile time. </p> <p>In this case you are relying on the compiler being clever enough to unroll the loop into a block of numberOfWovenFunctions iterations, or generate a switch of the inlined functions for you, both of which are unlikely.</p> <p>If you wanted to make the idiom more generic you could do so with a recursive templates (it would be a pain to write if you do not have c++11 variadic templates), though whether it actually constitutes a simplification is perhaps questionable.</p> <p>i.e. you template on the list of woven function pointer values, and at each level call the woven function, store the result, call sendPacket and the recurse into the next template level with the stored result. Something like (untested):</p> <pre><code>template &lt;InterlacedFunction ... args&gt; struct WovenFunc; //Base case - send remaining packets template &lt;&gt; struct WovenFunc&lt;&gt;{ static int call(int value, int * packet, size_t count){ for(size_t c = 0; c &lt; count; ++c) SendData(packet[c]); return value; } }; //Recursive case - send packets + weave functions template &lt;InterlacedFunction arg, InterlacedFunction ... args&gt; struct WovenFunc&lt;arg, args...&gt;{ static int call(int initial, int * packets, size_t count){ int r = arg(initial); SendData(packets[0]); if(count) return WovenFunc&lt;args...&gt;::call(r, packets + 1, count - 1); } }; </code></pre> <p>And then in the send:</p> <pre><code>typedef WovenFunc&lt;Woven1, Woven2, Woven3&gt; WovenSend WovenSend::call(returnFromLastWoven, packets, packetLength); </code></pre> <p>Obviously you can make is more generic.</p>
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    1. POInlining Array of Function Pointers in Clang/LLVM
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    1. COThanks for your answer! According to the Clang status page, variadic templates are currently supported so I'll check them out.
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      1. USSam Cristall
    2. COI added some rough code seeing a you can use variadics.
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    3. COI just worked through this and thought you should know that Clang doesn't seem to like empty template parameters. After some digging, adding "typename = void" in the base case made it work! Thank you for all your help.
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