123456789101112131415161718192021222324252627282930313233343536373839404142434445 |
- [/
- 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:is_const is_const]
- template <class T>
- struct is_const : public __tof {};
-
- __inherit If T is a (top level) const-qualified type then inherits from __true_type,
- otherwise inherits from __false_type.
- __std_ref 3.9.3.
- __header ` #include <boost/type_traits/is_const.hpp>` or ` #include <boost/type_traits.hpp>`
- [all_compilers]
- __examples
- [:`is_const<int const>` inherits from `__true_type`.]
- [:`is_const<int const volatile>::type` is the type `__true_type`.]
- [:`is_const<int* const>::value` is an integral constant
- expression that evaluates to /true/.]
- [:`is_const<int const*>::value` is an integral constant
- expression that evaluates to /false/: the const-qualifier is not
- at the top level in this case.]
- [:`is_const<int const&>::value` is an integral constant
- expression that evaluates to /false/: the const-qualifier is not
- at the top level in this case.]
- [:`is_const<int>::value` is an integral constant
- expression that evaluates to /false/.]
- [:`is_const<T>::value_type` is the type `bool`.]
- [endsect]
|