Add array_fill_test_cx.cpp

test/Jamfile.v2

@@ -59,6 +59,7 @@ compile array_get_test_cx.cpp ;
 
 # C++14 constexpr
 
+compile array_fill_test_cx.cpp ;
 compile array_eq_test_cx.cpp ;
 compile array_lt_test_cx.cpp ;
 

test/array_fill_test_cx.cpp

@@ -0,0 +1,51 @@
+// Copyright 2025 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt)
+
+#include <boost/array.hpp>
+#include <boost/config.hpp>
+#include <boost/config/pragma_message.hpp>
+#include <boost/config/workaround.hpp>
+#include <cstddef>
+
+#if defined(BOOST_NO_CXX14_CONSTEXPR)
+
+BOOST_PRAGMA_MESSAGE("Test skipped because BOOST_NO_CXX11_CONSTEXPR is defined")
+
+#else
+
+#define STATIC_ASSERT(...) static_assert(__VA_ARGS__, #__VA_ARGS__)
+
+template<class T, std::size_t N> constexpr boost::array<T, N> filled( T const& v )
+{
+    boost::array<T, N> r = {};
+
+    r.fill( v );
+
+    return r;
+}
+
+template<class T> void test1()
+{
+    constexpr boost::array<T, 4> a1 = filled<T, 4>( 7 );
+
+    STATIC_ASSERT( a1[0] == 7 );
+    STATIC_ASSERT( a1[1] == 7 );
+    STATIC_ASSERT( a1[2] == 7 );
+    STATIC_ASSERT( a1[3] == 7 );
+}
+
+template<class T> void test2()
+{
+    constexpr boost::array<T, 0> a1 = filled<T, 0>( 7 );
+
+    (void)a1;
+}
+
+int main()
+{
+    test1<int>();
+    test2<int>();
+}
+
+#endif