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Add mp_valid_q

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This commit is contained in:
Peter Dimov
2019-02-14 20:15:29 +02:00
parent beb9c2dd59
commit ca7e140827
2 changed files with 13 additions and 0 deletions
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2
include/boost/mp11/utility.hpp
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@@ -92,6 +92,8 @@ template<template<class...> class F, class... T> using mp_valid = typename detai
#endif #endif
template<class Q, class... T> using mp_valid_q = mp_valid<Q::template fn, T...>;
// mp_defer // mp_defer
namespace detail namespace detail
{ {

11
test/mp_valid.cpp
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@@ -34,6 +34,7 @@ using Q_add_pointer = mp_quote<add_pointer>;
int main() int main()
{ {
using boost::mp11::mp_valid; using boost::mp11::mp_valid;
using boost::mp11::mp_valid_q;
using boost::mp11::mp_identity; using boost::mp11::mp_identity;
BOOST_TEST_TRAIT_FALSE((mp_valid<mp_identity>)); BOOST_TEST_TRAIT_FALSE((mp_valid<mp_identity>));
@@ -50,6 +51,11 @@ int main()
BOOST_TEST_TRAIT_FALSE((mp_valid<QX::fn, int>)); BOOST_TEST_TRAIT_FALSE((mp_valid<QX::fn, int>));
BOOST_TEST_TRAIT_FALSE((mp_valid<QX::fn, void, void>)); BOOST_TEST_TRAIT_FALSE((mp_valid<QX::fn, void, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid_q<QX>));
BOOST_TEST_TRAIT_TRUE((mp_valid_q<QX, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid_q<QX, int>));
BOOST_TEST_TRAIT_FALSE((mp_valid_q<QX, void, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid<add_pointer>)); BOOST_TEST_TRAIT_FALSE((mp_valid<add_pointer>));
BOOST_TEST_TRAIT_TRUE((mp_valid<add_pointer, void>)); BOOST_TEST_TRAIT_TRUE((mp_valid<add_pointer, void>));
BOOST_TEST_TRAIT_TRUE((mp_valid<add_pointer, int>)); BOOST_TEST_TRAIT_TRUE((mp_valid<add_pointer, int>));
@@ -64,6 +70,11 @@ int main()
BOOST_TEST_TRAIT_TRUE((mp_valid<Q_add_pointer::fn, int>)); BOOST_TEST_TRAIT_TRUE((mp_valid<Q_add_pointer::fn, int>));
BOOST_TEST_TRAIT_FALSE((mp_valid<Q_add_pointer::fn, void, void>)); BOOST_TEST_TRAIT_FALSE((mp_valid<Q_add_pointer::fn, void, void>));
BOOST_TEST_TRAIT_FALSE((mp_valid_q<Q_add_pointer>));
BOOST_TEST_TRAIT_TRUE((mp_valid_q<Q_add_pointer, void>));
BOOST_TEST_TRAIT_TRUE((mp_valid_q<Q_add_pointer, int>));
BOOST_TEST_TRAIT_FALSE((mp_valid_q<Q_add_pointer, void, void>));
#if !BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, < 70000 ) #if !BOOST_MP11_WORKAROUND( BOOST_MP11_GCC, < 70000 )
// g++ up to at least 6.3 doesn't like add_reference for some reason or other // g++ up to at least 6.3 doesn't like add_reference for some reason or other
BOOST_TEST_TRAIT_FALSE((mp_valid<add_reference>)); BOOST_TEST_TRAIT_FALSE((mp_valid<add_reference>));