c++ - Type-specific static declaration in a template function -

i've written following snippet:

// fix mingw 4.9.2 bug - std::log2 missing there template <typename t> t log2 (t value) {     static const t l2 = std::log(t(2));     return std::log(value) / l2; } 

obviously, l2 should unique each t type because is of type t. work way per c++ standard?

note once instantiated

log2<double> 

and

log2<float> 

are 2 different functions. both own static variable. after template instantiation, same situation if had 2 functions:

double log2(double) {     static double x;     /*...*/ } 

and

float log2(float) {     static float x;     /*...*/ } 

this nicely explained here in example around 6:00.