| 1 | /*
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| 2 | * test_boost_test_decorator_enable_if -- Test case exposing
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| 3 | * compilation problem with g++ (not clang++) against Boost trunk
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| 4 | * svn rev. <=76217 (after 1.48.0 release) due to ambiguity between
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| 5 | * template<class Cond, class T> struct boost::enable_if and class
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| 6 | * boost::unit_test::decorator::enable_if in
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| 7 | * boost/typeof/native.hpp.
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| 8 | *
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| 9 | * Copyright (C) 2011 Torsten Maehne
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| 10 | *
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| 11 | * Distributed under the Boost Software License, Version 1.0.
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| 12 | * (See accompanying file LICENSE_1_0.txt or copy at
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| 13 | * http://www.boost.org/LICENSE_1_0.txt)
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| 14 | */
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| 15 |
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| 16 | /*!
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| 17 | * \file test_boost_test_decorator_enable_if.cpp
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| 18 | *
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| 19 | * \brief Test case exposing compilation problem with g++ (not
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| 20 | * clang++) against Boost trunk svn rev. <=76217 (after
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| 21 | * 1.48.0 release) due to ambiguity between template<class
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| 22 | * Cond, class T> struct boost::enable_if and class
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| 23 | * boost::unit_test::decorator::enable_if in
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| 24 | * boost/typeof/native.hpp.
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| 25 | *
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| 26 | * This test case compiles correctly against Boost 1.48.0 using Apple
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| 27 | * g++ 4.2.1, MacPorts g++ 4.5.3 and 4.6.2 as well as Apple clang++
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| 28 | * 3.0 on Mac OS X Lion 10.7.2 and Xcode 4.2.1.
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| 29 | *
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| 30 | * It fails to compile against Boost trunk until at least svn
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| 31 | * rev. 76217 using any of the mentioned g++ versions. Surprisingly,
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| 32 | * clang++ 3.0 is still able to correctly compile the test case.
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| 33 | *
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| 34 | * This test case is derived from
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| 35 | * test_signed_integer_output_with_karma.cpp in Trac ticket #6126
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| 36 | * <https://svn.boost.org/trac/boost/ticket/6126>. During the
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| 37 | * discussion of ticket #6126 on the Boost-Spirit-general mailing
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| 38 | * list, Jeroen Habraken identified the header
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| 39 | * boost/test/tree/decorator.hpp as the origin for the compilation
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| 40 | * failure of the test case agains Boost trunk. He found the cause to
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| 41 | * be an ambiguity:
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| 42 | *
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| 43 | * boost/typeof/native.hpp:30:9: error: reference to 'enable_if' is ambiguous
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| 44 | * boost/utility/enable_if.hpp:36:10: error: candidates are:
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| 45 | * template<class Cond, class T> struct boost::enable_if and
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| 46 | * class boost::unit_test::decorator::enable_if
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| 47 | *
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| 48 | * As enable_if is often used without being fully qualified this
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| 49 | * breaks in a major fashion. Since boost/test/tree/decorator.hpp seems
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| 50 | * to be quite new (added 2011-10-02 11:00:16 +0200) it might be best
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| 51 | * fixed there.
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| 52 | *
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| 53 | * For details, please cf. to:
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| 54 | * <http://sourceforge.net/mailarchive/forum.php?thread_name=CAGCnmH11u2%2Bvfef9v8YpPnbv1cN%3Da5Px2xSu%3DKTnaKBve2vTwQ%40mail.gmail.com&forum_name=spirit-general>
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| 55 | *
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| 56 | * \author Torsten Maehne
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| 57 | * \date 2011-12-29
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| 58 | * \version $Id$
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| 59 | */
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| 60 | #define BOOST_TEST_MODULE test_boost_test_decorator_enable_if
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| 61 | #include <boost/test/included/unit_test.hpp>
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| 62 | #include <boost/typeof/native.hpp>
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| 63 |
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| 64 | //! \test Dummy test.
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| 65 | BOOST_AUTO_TEST_CASE(test_dummy)
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| 66 | {
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| 67 | // do nothing
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| 68 | }
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