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Asked: 2026-05-16T16:58:30+00:00

Does the C++ standard guarantee that the call c = std::min(f(x), g(x)); evaluates the

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Does the C++ standard guarantee that the call

c = std::min(f(x), g(x));

evaluates the functions f and g only once?

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1 Answer

  1. Editorial Team

    Yes. Since std::min is a function, f(x) and g(x) will be evaluated only once. And returned values won’t be copied. See the prototype of the function :

    template<typename T>     
const T& min ( const T& a, const T& b );

    It is a clear difference with preprocessor-genuinely-defined min macro :

    #define MIN(A,B) ((A)<(B))?(A):(B)
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