match¶
Header¶
#include <boost/hof/match.hpp>
Description¶
The match function adaptor combines several functions together and
resolves which one should be called by using C++ overload resolution. This
is different than the first_of adaptor which resolves
them based on order.
Synopsis¶
template<class... Fs>
constexpr match_adaptor<Fs...> match(Fs...fs);
Example¶
#include <boost/hof.hpp>
using namespace boost::hof;
struct int_class
{
int operator()(int) const
{
return 1;
}
};
struct foo
{};
struct foo_class
{
foo operator()(foo) const
{
return foo();
}
};
typedef match_adaptor<int_class, foo_class> fun;
static_assert(std::is_same<int, decltype(fun()(1))>::value, "Failed match");
static_assert(std::is_same<foo, decltype(fun()(foo()))>::value, "Failed match");
int main() {}