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Asked: 2026-05-11T04:03:07+00:00

Is there a way that I can create a function that takes an int

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Is there a way that I can create a function that takes an int template parameter, and have that function give a compile time error if the value passed to the function is less than 10?

The following code does not work, but it shows what I want to accomplish:

template <int number1> void reportErrorIfLessThan10() {     #if(number1 < 10)         #error the number is less than 10     #endif }   int maint(int argc, char**argv) {    reportErrorIfLessThan10<5>();//report an error!    reportErrorIfLessThan10<12>();//ok    return 0; }
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1 Answer

  1. If you don’t want Boost C++ Libraries magic and want bare bones…

    template<bool> class static_check { };  template<> class static_check<false> { private: static_check(); };  #define StaticAssert(test) static_check<(test) != 0>()

    Then use StaticAssert. It’s a #define for me because I have code that needs to run in a lot of environments where C++ doesn’t work right for templates and I need to just back it off to a runtime assert. 🙁

    Also, not the best error messages.

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