Add bind_front_md_constexpr_test

test/Jamfile

@@ -61,3 +61,4 @@ run bind_front_md_test.cpp ;
 compile bind_front_fn_constexpr_test.cpp ;
 compile bind_front_obj_constexpr_test.cpp ;
 compile bind_front_mfn_constexpr_test.cpp ;
+compile bind_front_md_constexpr_test.cpp ;

test/bind_front_md_constexpr_test.cpp

@@ -0,0 +1,58 @@
+// Copyright 2024 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/compat/bind_front.hpp>
+#include <boost/config.hpp>
+#include <boost/config/workaround.hpp>
+#include <boost/config/pragma_message.hpp>
+
+#if defined(BOOST_NO_CXX14_CONSTEXPR)
+
+BOOST_PRAGMA_MESSAGE( "Test skipped because BOOST_NO_CXX14_CONSTEXPR is defined" )
+int main() {}
+
+#else
+
+#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
+#define BOOST_TEST_EQ(x, y) STATIC_ASSERT((x) == (y))
+
+struct X
+{
+ int m = -1;
+};
+
+struct Y: public X
+{
+};
+
+int main()
+{
+ {
+ BOOST_TEST_EQ( boost::compat::bind_front( &X::m, X() )(), -1 );
+ }
+
+ {
+ constexpr X x = {};
+
+ BOOST_TEST_EQ( boost::compat::bind_front( &X::m, x )(), -1 );
+ BOOST_TEST_EQ( boost::compat::bind_front( &X::m, &x )(), -1 );
+ }
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, >= 1920 && BOOST_MSVC < 1940)
+
+ {
+ BOOST_TEST_EQ( boost::compat::bind_front( &X::m, Y() )(), -1 );
+ }
+
+ {
+ constexpr Y y = {};
+
+ BOOST_TEST_EQ( boost::compat::bind_front( &X::m, y )(), -1 );
+ BOOST_TEST_EQ( boost::compat::bind_front( &X::m, &y )(), -1 );
+ }
+
+#endif
+}
+
+#endif

test/bind_front_mfn_constexpr_test.cpp

@@ -20,7 +20,6 @@ int main() {}
 #define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
 #define BOOST_TEST_EQ(x, y) STATIC_ASSERT((x) == (y))
 
-
 struct X
 {
  constexpr int f0()