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    <p>For a C++ program, you can unroll loops within the language. You won't need to figure out compiler-specific options. For example,</p> <pre><code>#include &lt;cstddef&gt; #include &lt;iostream&gt; template&lt;std::size_t N, typename FunctionType, std::size_t I&gt; class repeat_t { public: repeat_t(FunctionType function) : function_(function) {} FunctionType operator()() { function_(I); return repeat_t&lt;N,FunctionType,I+1&gt;(function_)(); } private: FunctionType function_; }; template&lt;std::size_t N, typename FunctionType&gt; class repeat_t&lt;N,FunctionType,N&gt; { public: repeat_t(FunctionType function) : function_(function) {} FunctionType operator()() { return function_; } private: FunctionType function_; }; template&lt;std::size_t N, typename FunctionType&gt; repeat_t&lt;N,FunctionType,0&gt; repeat(FunctionType function) { return repeat_t&lt;N,FunctionType,0&gt;(function); } void loop_function(std::size_t index) { std::cout &lt;&lt; index &lt;&lt; std::endl; } int main(int argc, char** argv) { repeat&lt;10&gt;(loop_function)(); return 0; } </code></pre> <p><strong>Example with complicated loop function</strong></p> <pre><code>template&lt;typename T, T V1&gt; struct sum_t { sum_t(T v2) : v2_(v2) {} void operator()(std::size_t) { v2_ += V1; } T result() const { return v2_; } private: T v2_; }; int main(int argc, char* argv[]) { typedef sum_t&lt;int,2&gt; add_two; std::cout &lt;&lt; repeat&lt;4&gt;(add_two(3))().result() &lt;&lt; std::endl; return 0; } // output is 11 (3+2+2+2+2) </code></pre> <p><strong>Using a closure instead of an explicit function object</strong></p> <pre><code>int main(int argc, char* argv[]) { int accumulator{3}; repeat&lt;4&gt;( [&amp;](std::size_t) { accumulator += 2; })(); std::cout &lt;&lt; accumulator &lt;&lt; std::endl; } </code></pre>
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    1. COYes, this is my default way of doing it. But since I am already inside a template with parameters which need to get into the `loop_function` it gets really ugly... that is why I am looking for some more "eye-pleasing" solution :)
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    2. COIf you can use C++11, then you can use constexpr functions to cut down on the template syntax noise.
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    3. CONot if only some parameters are constexpr/template and some are regular dynamic parameters... or?
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