Rename Q::apply to Q::invoke, mp_unquote to mp_invoke.

doc/mp11/utility.qbk

@@ -64,17 +64,17 @@ When `mp_valid<F, T...>` is `mp_true`, `mp_defer<F, T...>` is a struct with a ne
 [section `mp_quote<F, T...>`]
     template<template<class...> class F, class... T> struct mp_quote
     {
-        template<class... U> using apply = F<T..., U...>;
+        template<class... U> using invoke = F<T..., U...>;
     };
 
-`mp_quote<F, T...>` transforms the template `F` into a type. In the common case `mp_quote<F>`, the nested template `apply` of the result is an alias for `F`;
+`mp_quote<F, T...>` transforms the template `F` into a type. In the common case `mp_quote<F>`, the nested template `invoke` of the result is an alias for `F`;
-otherwise, `apply<U...>` is an alias for `F<T..., U...>`, allowing partial application.
+otherwise, `invoke<U...>` is an alias for `F<T..., U...>`, allowing partial application.
 [endsect]
 
 [section `mp_unquote<Q, T...>`]
-    template<class Q, class... T> using mp_unquote = typename Q::template apply<T...>;
+    template<class Q, class... T> using mp_unquote = typename Q::template invoke<T...>;
 
-`mp_unquote<Q, T...>` evaluates the nested template `apply` of a quoted metafunction. `mp_unquote<mp_quote<F>, T...>` is an alias for `F<T...>`. `mp_unquote<mp_quote<F, T...>, U...>` is an alias for `F<T..., U...>`.
+`mp_unquote<Q, T...>` evaluates the nested template `invoke` of a quoted metafunction. `mp_unquote<mp_quote<F>, T...>` is an alias for `F<T...>`. `mp_unquote<mp_quote<F, T...>, U...>` is an alias for `F<T..., U...>`.
 [endsect]
 
 [endsect]

include/boost/mp11/utility.hpp

@@ -106,26 +106,26 @@ template<template<class...> class F, class... T> using mp_defer = mp_if<mp_valid
 // mp_quote
 template<template<class...> class F, class... T> struct mp_quote
 {
-    template<class... U> using apply = F<T..., U...>;
+    template<class... U> using invoke = F<T..., U...>;
 };
 
 // mp_unquote
 namespace detail
 {
 
-template<class Q, class... T> struct mp_unquote_impl
+template<class Q, class... T> struct mp_invoke_impl
 {
-    using type = typename Q::template apply<T...>;
+    using type = typename Q::template invoke<T...>;
 };
 
-template<template<class...> class F, class... T, class... U> struct mp_unquote_impl<mp_quote<F, T...>, U...>
+template<template<class...> class F, class... T, class... U> struct mp_invoke_impl<mp_quote<F, T...>, U...>
 {
     using type = F<T..., U...>;
 };
 
 } // namespace detail
 
-template<class Q, class... T> using mp_unquote = typename detail::mp_unquote_impl<Q, T...>::type;
+template<class Q, class... T> using mp_invoke = typename detail::mp_invoke_impl<Q, T...>::type;
 
 } // namespace mp11
 } // namespace boost

test/Jamfile.v2

@@ -69,6 +69,7 @@ run mp_eval_if.cpp : : : $(REQ) ;
 run mp_valid.cpp : : : $(REQ) ;
 run mp_defer.cpp : : : $(REQ) ;
 run mp_quote.cpp : : : $(REQ) ;
+run mp_invoke.cpp : : : $(REQ) ;
 
 # integer_sequence
 run integer_sequence.cpp : : : $(REQ) ;

test/mp_invoke.cpp

@@ -0,0 +1,56 @@
+
+//  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/mp11/integral.hpp>
+#include <boost/core/lightweight_test_trait.hpp>
+#include <type_traits>
+
+using boost::mp11::mp_invoke;
+using boost::mp11::mp_size_t;
+
+struct Q1
+{
+    template<class...> using invoke = void;
+};
+
+struct Q2
+{
+    template<class...> class invoke;
+};
+
+struct Q3
+{
+    template<class... T> using invoke = mp_size_t<sizeof...(T)>;
+};
+
+struct Q4
+{
+    template<class T1, class... T> using invoke = T1;
+};
+
+int main()
+{
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q1>, void>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q1, int>, void>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q1, int[], char[]>, void>));
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q2>, Q2::invoke<>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q2, int>, Q2::invoke<int>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q2, int[], char[]>, Q2::invoke<int[], char[]>>));
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q3>, mp_size_t<0>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q3, int>, mp_size_t<1>>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q3, int[], char[]>, mp_size_t<2>>));
+
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q4, int>, int>));
+    BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q4, int[], char[]>, int[]>));
+
+    return boost::report_errors();
+}

test/mp_quote.cpp

@@ -1,5 +1,5 @@
 
-//  Copyright 2015 Peter Dimov.
+//  Copyright 2015, 2017 Peter Dimov.
 //
 // Distributed under the Boost Software License, Version 1.0.
 //
@@ -11,13 +11,13 @@
 #include <boost/core/lightweight_test_trait.hpp>
 #include <type_traits>
 
-using boost::mp11::mp_unquote;
+using boost::mp11::mp_invoke;
 
 template<class...> struct X {};
 
 template<template<class...> class F, class... T> using Y = X<F<T>...>;
 
-template<class Q, class... T> using Z = X<mp_unquote<Q, T>...>;
+template<class Q, class... T> using Z = X<mp_invoke<Q, T>...>;
 
 struct B {};
 struct D1: B {};
@@ -34,27 +34,27 @@ int main()
     {
         using Q = mp_quote<mp_identity_t>;
 
-        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_unquote<Q, void>, void>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, void>));
-        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_unquote<Q, int[]>, int[]>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, int[]>));
     }
 
     {
         using Q = mp_quote<std::is_same, void>;
 
-        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_unquote<Q, void>, std::is_same<void, void>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, void>, std::is_same<void, void>>));
-        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_unquote<Q, int[]>, std::is_same<void, int[]>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[]>, std::is_same<void, int[]>>));
     }
 
     {
         using Q = mp_quote<X, char[1], char[2], char[3]>;
 
-        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_unquote<Q, int[1], int[2], int[3]>, X<char[1], char[2], char[3], int[1], int[2], int[3]>>));
+        BOOST_TEST_TRAIT_TRUE((std::is_same<mp_invoke<Q, int[1], int[2], int[3]>, X<char[1], char[2], char[3], int[1], int[2], int[3]>>));
     }
 
     {
         using Q = mp_quote<mp_identity_t>;
 
-        // using R1 = Y<Q::template apply, void, char, int>;
+        // using R1 = Y<Q::template invoke, void, char, int>;
         // BOOST_TEST_TRAIT_TRUE((std::is_same<R1, X<void, char, int>>));
         // 
         // error: pack expansion used as argument for non-pack parameter of alias template
@@ -71,7 +71,7 @@ int main()
 
 #if defined( BOOST_MSVC ) && BOOST_WORKAROUND( BOOST_MSVC, <= 1800 )
 #else
-        using R1 = Y<Q::template apply, D1, D2, ND, int>;
+        using R1 = Y<Q::template invoke, D1, D2, ND, int>;
         BOOST_TEST_TRAIT_TRUE((std::is_same<R1, X<std::true_type, std::true_type, std::false_type, std::false_type>>));
 #endif