Add mp_quote_trait

test/Jamfile

@@ -89,6 +89,7 @@ run mp_defer.cpp : : : $(REQ) ;
 run mp_quote.cpp : : : $(REQ) ;
 run mp_invoke.cpp : : : $(REQ) ;
 run mp_invoke_sf.cpp : : : $(REQ) ;
+run mp_quote_trait.cpp : : : $(REQ) ;
 
 # integer_sequence
 run integer_sequence.cpp : : : $(REQ) ;

test/mp_invoke_sf.cpp

@@ -13,7 +13,9 @@
 
 using boost::mp11::mp_invoke;
 using boost::mp11::mp_quote;
+using boost::mp11::mp_quote_trait;
 using boost::mp11::mp_valid;
+using boost::mp11::mp_identity;
 using boost::mp11::mp_identity_t;
 
 int main()
@@ -29,5 +31,14 @@ int main()
     BOOST_TEST_TRAIT_TRUE((mp_valid<mp_invoke, Qi, void>));
     BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, Qi, void, void>));
 
+    using Qt = mp_quote_trait<mp_identity>;
+
+#if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1800 )
+#else
+    BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, Qt>));
+#endif
+    BOOST_TEST_TRAIT_TRUE((mp_valid<mp_invoke, Qt, void>));
+    BOOST_TEST_TRAIT_FALSE((mp_valid<mp_invoke, Qt, void, void>));
+
     return boost::report_errors();
 }

test/mp_quote.cpp

@@ -1,5 +1,5 @@
 
-//  Copyright 2015, 2017 Peter Dimov.
+// Copyright 2015, 2017 Peter Dimov.
 //
 // Distributed under the Boost Software License, Version 1.0.
 //

test/mp_quote_trait.cpp

@@ -0,0 +1,41 @@
+
+// Copyright 2015, 2017 Peter Dimov.
+//
+// Distributed under the Boost Software License, Version 1.0.
+//
+// See accompanying file LICENSE_1_0.txt or copy at
+// http://www.boost.org/LICENSE_1_0.txt
+
+
+#include <boost/mp11/utility.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <type_traits>
+
+int main()
+{
+    using boost::mp11::mp_identity;
+    using boost::mp11::mp_quote_trait;
+    using boost::mp11::mp_invoke;
+
+    {
+        using Q = mp_quote_trait<mp_identity>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<void>, void>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<int[]>, int[]>));
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, void>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, int[]>));
+    }
+
+    {
+        using Q = mp_quote_trait<std::add_const>;
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<void>, void const>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<Q::fn<int[]>, int const[]>));
+
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, void const>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, int const[]>));
+    }
+
+    return boost::report_errors();
+}