Add constexpr tests for bind_back

boostorg · Mar 29, 2024 · 30242af · 30242af
1 parent 9a58caf
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diff --git a/test/Jamfile b/test/Jamfile
@@ -69,3 +69,8 @@ run bind_back_fn_test.cpp ;
 run bind_back_obj_test.cpp ;
 run bind_back_mfn_test.cpp ;
 run bind_back_md_test.cpp ;
+
+compile bind_back_fn_constexpr_test.cpp ;
+compile bind_back_obj_constexpr_test.cpp ;
+compile bind_back_mfn_constexpr_test.cpp ;
+compile bind_back_md_constexpr_test.cpp ;
diff --git a/test/bind_back_fn_constexpr_test.cpp b/test/bind_back_fn_constexpr_test.cpp
@@ -0,0 +1,60 @@
+// Copyright 2024 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(__GNUC__) && __GNUC__ == 7
+# pragma GCC diagnostic ignored "-Wnoexcept-type"
+#endif
+
+#include <boost/compat/bind_back.hpp>
+#include <boost/config.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))
+
+constexpr int f0()
+{
+    return -1;
+}
+
+constexpr int f1( int x1 ) noexcept
+{
+    return x1;
+}
+
+constexpr int f2( int x1, int x2 )
+{
+    return 10*x1+x2;
+}
+
+constexpr int f3( int x1, int x2, int x3 ) noexcept
+{
+    return 100*x1 + 10*x2 + x3;
+}
+
+int main()
+{
+    BOOST_TEST_EQ( boost::compat::bind_back( f0 )(), -1 );
+    BOOST_TEST_EQ( boost::compat::bind_back( f1 )( 1 ), 1 );
+    BOOST_TEST_EQ( boost::compat::bind_back( f2 )( 1, 2 ), 12 );
+    BOOST_TEST_EQ( boost::compat::bind_back( f3 )( 1, 2, 3 ), 123 );
+
+    BOOST_TEST_EQ( boost::compat::bind_back( f1, 1 )(), 1 );
+    BOOST_TEST_EQ( boost::compat::bind_back( f2, 1 )( 2 ), 21 );
+    BOOST_TEST_EQ( boost::compat::bind_back( f3, 1 )( 2, 3 ), 231 );
+
+    BOOST_TEST_EQ( boost::compat::bind_back( f2, 1, 2 )(), 12 );
+    BOOST_TEST_EQ( boost::compat::bind_back( f3, 1, 2 )( 3 ), 312 );
+
+    BOOST_TEST_EQ( boost::compat::bind_back( f3, 1, 2, 3 )(), 123 );
+}
+
+#endif
diff --git a/test/bind_back_md_constexpr_test.cpp b/test/bind_back_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_back.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_back( &X::m, X() )(), -1 );
+    }
+
+    {
+        constexpr X x = {};
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::m, x )(), -1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::m, &x )(), -1 );
+    }
+
+#if !BOOST_WORKAROUND(BOOST_MSVC, >= 1920 && BOOST_MSVC < 1940)
+
+    {
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::m, Y() )(), -1 );
+    }
+
+    {
+        constexpr Y y = {};
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::m, y )(), -1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::m, &y )(), -1 );
+    }
+
+#endif
+}
+
+#endif
diff --git a/test/bind_back_mfn_constexpr_test.cpp b/test/bind_back_mfn_constexpr_test.cpp
@@ -0,0 +1,137 @@
+// Copyright 2024 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#if defined(__GNUC__) && __GNUC__ == 7
+# pragma GCC diagnostic ignored "-Wnoexcept-type"
+#endif
+
+#include <boost/compat/bind_back.hpp>
+#include <boost/config.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
+{
+    constexpr int f0()
+    {
+        return -1;
+    }
+
+    constexpr int f1( int x1 ) noexcept
+    {
+        return x1;
+    }
+
+    constexpr int f2( int x1, int x2 ) const
+    {
+        return 10*x1+x2;
+    }
+
+    constexpr int f3( int x1, int x2, int x3 ) const noexcept
+    {
+        return 100*x1 + 10*x2 + x3;
+    }
+};
+
+struct Y: public X
+{
+};
+
+int main()
+{
+    {
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f0 )( X() ), -1 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f1 )( X(), 1 ), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2 )( X(), 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3 )( X(), 1, 2, 3 ), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f1, X(), 1 )(), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, X(), 1, 2 )(), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, X(), 1, 2, 3 )(), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f1, 1 )( X() ), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, 1, 2 )( X() ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, 1, 2, 3 )( X() ), 123 );
+    }
+
+    {
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f0 )( Y() ), -1 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f1 )( Y(), 1 ), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2 )( Y(), 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3 )( Y(), 1, 2, 3 ), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f1, Y(), 1 )(), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, Y(), 1, 2 )(), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, Y(), 1, 2, 3 )(), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f1, 1 )( Y() ), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, 1, 2 )( Y() ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, 1, 2, 3 )( Y() ), 123 );
+    }
+
+    {
+        constexpr X x = {};
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2 )( x, 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3 )( x, 1, 2, 3 ), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, x, 1, 2 )(), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, x, 1, 2, 3 )(), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, 1, 2 )( x ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, 1, 2, 3 )( x ), 123 );
+    }
+
+    {
+        constexpr Y x = {};
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2 )( x, 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3 )( x, 1, 2, 3 ), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, x, 1, 2 )(), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, x, 1, 2, 3 )(), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, 1, 2 )( x ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, 1, 2, 3 )( x ), 123 );
+    }
+
+    {
+        constexpr X x = {};
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2 )( &x, 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3 )( &x, 1, 2, 3 ), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, &x, 1, 2 )(), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, &x, 1, 2, 3 )(), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, 1, 2 )( &x ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, 1, 2, 3 )( &x ), 123 );
+    }
+
+    {
+        constexpr Y x = {};
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2 )( &x, 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3 )( &x, 1, 2, 3 ), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, &x, 1, 2 )(), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, &x, 1, 2, 3 )(), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f2, 1, 2 )( &x ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( &X::f3, 1, 2, 3 )( &x ), 123 );
+    }
+}
+
+#endif
diff --git a/test/bind_back_obj_constexpr_test.cpp b/test/bind_back_obj_constexpr_test.cpp
@@ -0,0 +1,96 @@
+// 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_back.hpp>
+#include <boost/config.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 F1
+{
+    constexpr int operator()()
+    {
+        return -1;
+    }
+
+    constexpr int operator()( int x1 ) noexcept
+    {
+        return x1;
+    }
+
+    constexpr int operator()( int x1, int x2 ) const
+    {
+        return 10*x1+x2;
+    }
+
+    constexpr int operator()( int x1, int x2, int x3 ) const noexcept
+    {
+        return 100*x1 + 10*x2 + x3;
+    }
+};
+
+struct F2
+{
+    constexpr int operator()( int x1, int x2 ) &
+    {
+        return 100*x1 + 10*x2 + 1;
+    }
+
+    constexpr int operator()( int x1, int x2 ) const &
+    {
+        return 100*x1 + 10*x2 + 2;
+    }
+    constexpr int operator()( int x1, int x2 ) &&
+    {
+        return 100*x1 + 10*x2 + 3;
+    }
+    constexpr int operator()( int x1, int x2 ) const &&
+    {
+        return 100*x1 + 10*x2 + 4;
+    }
+};
+
+int main()
+{
+    {
+        BOOST_TEST_EQ( boost::compat::bind_back( F1() )(), -1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( F1() )( 1 ), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( F1() )( 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( F1() )( 1, 2, 3 ), 123 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( F1(), 1 )(), 1 );
+        BOOST_TEST_EQ( boost::compat::bind_back( F1(), 1 )( 2 ), 21 );
+        BOOST_TEST_EQ( boost::compat::bind_back( F1(), 1 )( 2, 3 ), 231 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( F1(), 1, 2 )(), 12 );
+        BOOST_TEST_EQ( boost::compat::bind_back( F1(), 1, 2 )( 3 ), 312 );
+
+        BOOST_TEST_EQ( boost::compat::bind_back( F1(), 1, 2, 3 )(), 123 );
+    }
+
+    {
+        BOOST_TEST_EQ( boost::compat::bind_back( F2(), 9 )( 8 ), 893 );
+    }
+
+    {
+        constexpr auto fn = boost::compat::bind_back( F2(), 9 );
+        BOOST_TEST_EQ( fn( 8 ), 892 );
+    }
+
+    {
+        constexpr auto fn = boost::compat::bind_back( F2(), 9 );
+        BOOST_TEST_EQ( std::move( fn )( 8 ), 894 );
+    }
+}
+
+#endif