Boost.Hana: boost::hana::basic_type< T > Struct Template Reference

| Boost.Hana 1.7.1 Your standard library for metaprogramming |

boost::hana::basic_type< T > Struct Template Reference

## Description

### template<typename T>
struct boost::hana::basic_type< T >

Base class of `hana::type`; used for pattern-matching.

## Example

// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/for_each.hpp>
#include <boost/hana/tuple.hpp>
#include <boost/hana/type.hpp>
#include <boost/core/demangle.hpp>
#include <cstdlib>
#include <iostream>
#include <string>
namespace hana = boost::hana;
// Using hana::type<T> as a parameter type wouldn't work, since it may be
// a dependent type, in which case template argument deduction will fail.
// Using hana::basic_type<T> is fine, since this one is guaranteed to be
// a non dependent base of hana::type<T>.
template <typename T>
std::string const& name_of(hana::basic_type<T>) {
static std::string name = boost::core::demangle(typeid(T).name());
return name;
}
int main() {
hana::for_each(hana::tuple_t<int, char, void, std::string>, [](auto type) {
std::cout << name_of(type) << std::endl;
});
}
for_each.hpp
Defines boost::hana::for_each.
boost::hana::for_each
constexpr auto for_each
Perform an action on each element of a foldable, discarding the result each time.
Definition: for_each.hpp:39
boost::hana
Namespace containing everything in the library.
Definition: accessors.hpp:20
tuple.hpp
Defines boost::hana::tuple.
type.hpp
Defines boost::hana::type and related utilities.

Inherited by boost::hana::type_impl< T >::_.