| 1 | // (C) Copyright Eric Niebler 2005. |
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| 2 | // Use, modification and distribution are subject to the |
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| 3 | // Boost Software License, Version 1.0. (See accompanying file |
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| 4 | // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | |
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| 6 | /* |
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| 7 | Revision history: |
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| 8 | 25 August 2005 : Initial version. |
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| 9 | */ |
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| 10 | |
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| 11 | #include <boost/core/lightweight_test.hpp> |
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| 12 | |
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| 13 | /////////////////////////////////////////////////////////////////////////////// |
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| 14 | // define a user-defined collection type and teach BOOST_FOREACH how to enumerate it |
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| 15 | // |
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| 16 | namespace mine |
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| 17 | { |
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| 18 | struct dummy {}; |
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| 19 | char * range_begin(mine::dummy&) {return 0;} |
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| 20 | char const * range_begin(mine::dummy const&) {return 0;} |
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| 21 | char * range_end(mine::dummy&) {return 0;} |
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| 22 | char const * range_end(mine::dummy const&) {return 0;} |
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| 23 | } |
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| 24 | |
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| 25 | #include <boost/foreach.hpp> |
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| 26 | |
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| 27 | namespace boost |
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| 28 | { |
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| 29 | template<> |
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| 30 | struct range_mutable_iterator<mine::dummy> |
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| 31 | { |
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| 32 | typedef char * type; |
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| 33 | }; |
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| 34 | template<> |
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| 35 | struct range_const_iterator<mine::dummy> |
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| 36 | { |
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| 37 | typedef char const * type; |
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| 38 | }; |
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| 39 | } |
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| 40 | |
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| 41 | /////////////////////////////////////////////////////////////////////////////// |
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| 42 | // test_main |
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| 43 | // |
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| 44 | int main() |
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| 45 | { |
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| 46 | // loop over a user-defined type (just make sure this compiles) |
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| 47 | mine::dummy d; |
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| 48 | BOOST_FOREACH( char c, d ) |
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| 49 | { |
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| 50 | ((void)c); // no-op |
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| 51 | } |
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| 52 | |
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| 53 | return boost::report_errors(); |
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| 54 | } |
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| 55 | |
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