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Copy-editing optional documentation. Fixes #5382 and a few other issues I noticed while I was at it.
[SVN r71052]
This commit is contained in:
@ -1,4 +1,4 @@
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[/
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[/
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Boost.Optional
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Copyright (c) 2003-2007 Fernando Luis Cacciola Carballal
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@ -58,7 +58,7 @@ The observation made in the last paragraph about the irrelevant nature of the
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additional `nil_t` with respect to [_purpose] of `optional<T>` suggests an
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alternative model: a ['container] that either has a value of `T` or nothing.
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As of this writing I don't know of any precedence for a variable-size
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As of this writing I don't know of any precedent for a variable-size
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fixed-capacity (of 1) stack-based container model for optional values, yet I
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believe this is the consequence of the lack of practical implementations of
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such a container rather than an inherent shortcoming of the container model.
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@ -176,14 +176,14 @@ untitialized optional objects: The operators * and ->]
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A relevant feature of a pointer is that it can have a [*null pointer value].
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This is a ['special] value which is used to indicate that the pointer is not
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referring to any object at all. In other words, null pointer values convey
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the notion of inexistent objects.
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the notion of nonexistent objects.
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This meaning of the null pointer value allowed pointers to became a ['de
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facto] standard for handling optional objects because all you have to do
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to refer to a value which you don't really have is to use a null pointer
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value of the appropriate type. Pointers have been used for decades—from
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the days of C APIs to modern C++ libraries—to ['refer] to optional (that is,
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possibly inexistent) objects; particularly as optional arguments to a
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possibly nonexistent) objects; particularly as optional arguments to a
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function, but also quite often as optional data members.
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The possible presence of a null pointer value makes the operations that
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@ -217,8 +217,7 @@
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otherwise, same as:
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</li></ul></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<code class="computeroutput"><span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span> <span class="special">[</span><span class="error">'</span><span class="special">(</span><span class="keyword">not</span> <span class="identifier">a</span>
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<span class="identifier">ref</span><span class="special">)]>::</span><span class="identifier">optional</span><span class="special">()</span></code>
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<code class="computeroutput"><span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span> </code><span class="emphasis"><em>(not a ref)</em></span><code class="computeroutput"><span class="special">>::</span><span class="identifier">optional</span><span class="special">()</span></code>
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</p></blockquote></div>
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<div class="blockquote"><blockquote class="blockquote"><p>
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<code class="computeroutput"><span class="identifier">optional</span><span class="special"><</span><span class="identifier">T</span><span class="special">&></span> <span class="special">::</span><span class="identifier">optional</span><span class="special">()</span></code>
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@ -712,7 +711,7 @@
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<span class="bold"><strong>Exception Safety:</strong></span> Exceptions can only
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be thrown during the call to the <code class="computeroutput"><span class="identifier">T</span></code>
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constructor used by the factory; in that case, the <code class="computeroutput"><span class="identifier">optional</span></code>
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object will be left empty.
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object will be reset to be <span class="emphasis"><em>uninitialized</em></span>.
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</li>
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</ul></div>
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<p>
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@ -96,7 +96,7 @@
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value of <code class="computeroutput"><span class="identifier">T</span></code> or nothing.
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</p>
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<p>
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As of this writing I don't know of any precedence for a variable-size fixed-capacity
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As of this writing I don't know of any precedent for a variable-size fixed-capacity
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(of 1) stack-based container model for optional values, yet I believe this
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is the consequence of the lack of practical implementations of such a container
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rather than an inherent shortcoming of the container model.
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@ -302,7 +302,7 @@
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A relevant feature of a pointer is that it can have a <span class="bold"><strong>null
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pointer value</strong></span>. This is a <span class="emphasis"><em>special</em></span> value which
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is used to indicate that the pointer is not referring to any object at all.
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In other words, null pointer values convey the notion of inexistent objects.
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In other words, null pointer values convey the notion of nonexistent objects.
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</p>
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<p>
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This meaning of the null pointer value allowed pointers to became a <span class="emphasis"><em>de
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@ -310,7 +310,7 @@
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to do to refer to a value which you don't really have is to use a null pointer
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value of the appropriate type. Pointers have been used for decades—from
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the days of C APIs to modern C++ libraries—to <span class="emphasis"><em>refer</em></span>
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to optional (that is, possibly inexistent) objects; particularly as optional
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to optional (that is, possibly nonexistent) objects; particularly as optional
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arguments to a function, but also quite often as optional data members.
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</p>
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<p>
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@ -27,7 +27,7 @@
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</h3></div></div>
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<div><p class="copyright">Copyright © 2003-2007 Fernando Luis Cacciola Carballal</p></div>
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<div><div class="legalnotice">
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<a name="id3012019"></a><p>
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<a name="id2854050"></a><p>
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Distributed under the Boost Software License, Version 1.0. (See accompanying
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file LICENSE_1_0.txt or copy at <a href="http://www.boost.org/LICENSE_1_0.txt" target="_top">http://www.boost.org/LICENSE_1_0.txt</a>)
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</p>
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@ -145,7 +145,7 @@
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<span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special"><</span><span class="identifier">point</span><span class="special">,</span><span class="keyword">bool</span><span class="special">></span> <span class="identifier">polygon</span><span class="special">::</span><span class="identifier">get_any_point_effectively_inside</span><span class="special">();</span>
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</pre>
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<p>
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These functions use a consistent interface for dealing with possibly inexistent
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These functions use a consistent interface for dealing with possibly nonexistent
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results:
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</p>
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<pre class="programlisting"><span class="identifier">std</span><span class="special">::</span><span class="identifier">pair</span><span class="special"><</span><span class="identifier">point</span><span class="special">,</span><span class="keyword">bool</span><span class="special">></span> <span class="identifier">p</span> <span class="special">=</span> <span class="identifier">poly</span><span class="special">.</span><span class="identifier">get_any_point_effectively_inside</span><span class="special">();</span>
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@ -163,7 +163,7 @@
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</div>
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</div>
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<table xmlns:rev="http://www.cs.rpi.edu/~gregod/boost/tools/doc/revision" width="100%"><tr>
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<td align="left"><p><small>Last revised: April 06, 2011 at 20:44:42 GMT</small></p></td>
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<td align="left"><p><small>Last revised: April 06, 2011 at 21:53:26 GMT</small></p></td>
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<td align="right"><div class="copyright-footer"></div></td>
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</tr></table>
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<hr>
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@ -99,7 +99,7 @@ functions could have the following interface:
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std::pair<char,bool> get_async_input();
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std::pair<point,bool> polygon::get_any_point_effectively_inside();
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These functions use a consistent interface for dealing with possibly inexistent
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These functions use a consistent interface for dealing with possibly nonexistent
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results:
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std::pair<point,bool> p = poly.get_any_point_effectively_inside();
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@ -232,7 +232,7 @@ __SPACE__
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* otherwise, same as:
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[: `optional<T ['(not a ref)]>::optional()`]
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[: `optional<T `['(not a ref)]`>::optional()`]
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[: `optional<T&> ::optional()`]
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__SPACE__
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@ -513,7 +513,7 @@ from the factory `f` (i.e., the value [_is not copied]).
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* [*Notes:] See [link boost_optional.in_place_factories In-Place Factories]
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* [*Exception Safety:] Exceptions can only be thrown during the call to
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the `T` constructor used by the factory; in that case, the `optional` object
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will be left empty.
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will be reset to be ['uninitialized].
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__SPACE__
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