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[FEATURE REQUEST] Detect which overload is stored in multiple signature function #73
Description
I have a use case where i need a function object like so:
using callback_t = fu2::function_view<void(int), void(int,double, double)>;
Then i need to know which signature is currently stored so i know how to invoke it:
callback_t clb = ...;
...
void processing(callback_t clb)
{
int decision = 0;
double some_stat = 0;
double some_other_stat = 0;
if (clb.contains<0>())
clb(decision);
else
clb(decision,some_stat,some_other_stat);
}
Currently my callback type is templated so i can use something like:
template<class F>
void processing(F clb)
{
int decision = 0;
double some_stat = 0;
double some_other_stat = 0;
if constexpr(std::is_invocable_v<F, int>)
clb(decision);
else if constexpr(std::is_invocable_v<F,int,double,double>
clb(decision,some_stat,some_other_stat);
}
I quite would like to move my processing() function from the header to the .cpp file which requires some kind of type erasure which this library seems to provide. However i need to sort out this issue.
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