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Last change
on this file since 12 was
12,
checked in by landauf, 17 years ago
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added boost
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Property svn:executable set to
*
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File size:
792 bytes
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| 1 | // Copyright Daniel Wallin, David Abrahams 2005. Use, modification and |
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| 2 | // distribution is subject to the Boost Software License, Version 1.0. (See |
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| 3 | // accompanying file LICENSE_1_0.txt or copy at |
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| 4 | // http://www.boost.org/LICENSE_1_0.txt) |
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| 5 | |
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| 6 | #ifndef YESNO_050328_HPP |
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| 7 | #define YESNO_050328_HPP |
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| 8 | |
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| 9 | #include <boost/mpl/bool.hpp> |
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| 10 | |
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| 11 | namespace boost { namespace parameter { namespace aux { |
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| 12 | |
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| 13 | // types used with the "sizeof trick" to capture the results of |
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| 14 | // overload resolution at compile-time. |
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| 15 | typedef char yes_tag; |
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| 16 | typedef char (&no_tag)[2]; |
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| 17 | |
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| 18 | // mpl::true_ and mpl::false_ are not distinguishable by sizeof(), |
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| 19 | // so we pass them through these functions to get a type that is. |
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| 20 | yes_tag to_yesno(mpl::true_); |
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| 21 | no_tag to_yesno(mpl::false_); |
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| 22 | |
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| 23 | }}} // namespace boost::parameter::aux |
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| 24 | |
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| 25 | #endif // YESNO_050328_HPP |
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| 26 | |
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