From 9cad6fbca9d9821c72918248f79505dcc05a6556 Mon Sep 17 00:00:00 2001
From: Peter Dimov <pdimov@gmail.com>
Date: Thu, 21 Mar 2024 20:12:01 +0200
Subject: [PATCH] Add invoke_obj_test

---
 test/Jamfile             |  1 +
 test/invoke_obj_test.cpp | 57 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 58 insertions(+)
 create mode 100644 test/invoke_obj_test.cpp

diff --git a/test/Jamfile b/test/Jamfile
index f4fb748..8620da0 100644
--- a/test/Jamfile
+++ b/test/Jamfile
@@ -30,3 +30,4 @@ run shared_lock_test.cpp ;
 run shared_lock_test.cpp : : : <exception-handling>off : shared_lock_test_nx ;
 
 run invoke_fn_test.cpp ;
+run invoke_obj_test.cpp ;
diff --git a/test/invoke_obj_test.cpp b/test/invoke_obj_test.cpp
new file mode 100644
index 0000000..72547a1
--- /dev/null
+++ b/test/invoke_obj_test.cpp
@@ -0,0 +1,57 @@
+// Copyright 2024 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/compat/invoke.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+struct F
+{
+    int operator()()
+    {
+        return -1;
+    }
+
+    int operator()( int x1 ) noexcept
+    {
+        return x1;
+    }
+
+    int operator()( int x1, int x2 ) const
+    {
+        return 10*x1+x2;
+    }
+
+    int operator()( int x1, int x2, int x3 ) const noexcept
+    {
+        return 100*x1 + 10*x2 + x3;
+    }
+};
+
+int main()
+{
+    {
+        BOOST_TEST_EQ( boost::compat::invoke( F() ), -1 );
+        BOOST_TEST_EQ( boost::compat::invoke( F(), 1 ), 1 );
+        BOOST_TEST_EQ( boost::compat::invoke( F(), 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::invoke( F(), 1, 2, 3 ), 123 );
+    }
+
+    {
+        F f;
+
+        BOOST_TEST_EQ( boost::compat::invoke( f ), -1 );
+        BOOST_TEST_EQ( boost::compat::invoke( f, 1 ), 1 );
+        BOOST_TEST_EQ( boost::compat::invoke( f, 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::invoke( f, 1, 2, 3 ), 123 );
+    }
+
+    {
+        F const f = {};
+
+        BOOST_TEST_EQ( boost::compat::invoke( f, 1, 2 ), 12 );
+        BOOST_TEST_EQ( boost::compat::invoke( f, 1, 2, 3 ), 123 );
+    }
+
+    return boost::report_errors();
+}