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- [/
- Copyright 2007 John Maddock.
- Distributed under the Boost Software License, Version 1.0.
- (See accompanying file LICENSE_1_0.txt or copy at
- http://www.boost.org/LICENSE_1_0.txt).
- ]
- [section:integral_constant integral_constant]
- template <class T, T val>
- struct integral_constant
- {
- typedef integral_constant<T, val> type;
- typedef T value_type;
- static const T value = val;
- constexpr operator T()const;
- };
-
- typedef integral_constant<bool, true> true_type;
- typedef integral_constant<bool, false> false_type;
- Class template `integral_constant` is the common base class for all the value-based
- type traits. The two typedef's `true_type` and `false_type` are provided for
- convenience: most of the value traits are Boolean properties and so will inherit from
- one of these.
- [endsect]
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