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[/
/ Copyright (c) 2003-2008 Christopher M. Kohlhoff (chris at kohlhoff dot com)
/
/ 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:ConvertibleToConstBuffer Convertible to const buffer requirements]
A type that meets the requirements for convertibility to a const buffer must
meet the requirements of `CopyConstructible` types (C++ Std, 20.1.3), and the
requirements of `Assignable` types (C++ Std, 23.1).
In the table below, `X` denotes a class meeting the requirements for
convertibility to a const buffer, `a` and `b` denote values of type `X`, and
`u`, `v` and `w` denote identifiers.
[table ConvertibleToConstBuffer requirements
[[expression][postcondition]]
[
[``
const_buffer u(a);
const_buffer v(a);
``]
[``
buffer_cast<const void*>(u) == buffer_cast<const void*>(v)
&& buffer_size(u) == buffer_size(v)
``]
]
[
[``
const_buffer u(a);
const_buffer v = a;
``]
[``
buffer_cast<const void*>(u) == buffer_cast<const void*>(v)
&& buffer_size(u) == buffer_size(v)
``]
]
[
[``
const_buffer u(a);
const_buffer v; v = a;
``]
[``
buffer_cast<const void*>(u) == buffer_cast<const void*>(v)
&& buffer_size(u) == buffer_size(v)
``]
]
[
[``
const_buffer u(a);
const X& v = a;
const_buffer w(v);
``]
[``
buffer_cast<const void*>(u) == buffer_cast<const void*>(w)
&& buffer_size(u) == buffer_size(w)
``]
]
[
[``
const_buffer u(a);
X v(a);
const_buffer w(v);
``]
[``
buffer_cast<const void*>(u) == buffer_cast<const void*>(w)
&& buffer_size(u) == buffer_size(w)
``]
]
[
[``
const_buffer u(a);
X v = a;
const_buffer w(v);
``]
[``
buffer_cast<const void*>(u) == buffer_cast<const void*>(w)
&& buffer_size(u) == buffer_size(w)
``]
]
[
[``
const_buffer u(a);
X v(b); v = a;
const_buffer w(v);
``]
[``
buffer_cast<const void*>(u) == buffer_cast<const void*>(w)
&& buffer_size(u) == buffer_size(w)
``]
]
]
[endsect]
|
