Hi, You can use enable_if to let the compiler decide which one it should instantiate. And the argument will be a custom defined type trait. I think there are facilities to automatically define it on the presence of a type, there may be soemthing for fucntions as well, but I don't remember where they live (MPL ?) Matthieu 2009/1/21 Hicham Mouline :

Hello,

I have a template function

template <typename M> void f(const M&) { // call M.f1() // call M.f2()

// some Ms have a function f1Andf2() which does f1()+ f2() work faster // how can I write code that runs f1Andf2() if it's there // otherwise runs f1() then f2() }

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