I'm using VS2015 and I'm playing with std::function
and std::bind
I found a strange errors.
I have a 2 chained bind operation:
int main()
{
auto func1 = [](int i) -> int {
return i + 1;
};
auto func2 = [](float f, function<int(int)>&& func) -> float {
return f + func(f);
};
auto func2_instance = std::bind(func2, std::placeholders::_1, func1);
cout << func2_instance(0.2) << endl;
auto func3 = [](double d, function<float(float)>&& func)->double {
return d + func(d);
};
//doesn't work
auto func3_instance = std::bind(func3, std::placeholders::_1, std::move(func2_instance));
//works
auto func3_instance = std::bind(func3, std::placeholders::_1, [funcmv = std::move(func2_instance)](float a)->float{
return funcmv(a);
});
func3_instance(0.2);
}
the error I got is related to line func3_instance(0.2)
D:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include\type_traits(1468): error C2893: Failed to specialize function template 'unknown-type std::invoke(_Callable &&,_Types &&...)'
Could you please help? What I miss related to std::bind
?
Merci in advance.
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