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| <body> |
| <div class="document" id="boost-pointer-container-library"> |
| <h1 class="title"><img alt="Boost" src="boost.png" /> Pointer Container Library</h1> |
| <div class="section"> |
| <h1><a id="class-ptr-array" name="class-ptr-array">Class <tt class="docutils literal"><span class="pre">ptr_array</span></tt></a></h1> |
| <p>A <tt class="docutils literal"><span class="pre">ptr_array<T,size></span></tt> is a pointer container that uses an underlying <tt class="docutils literal"><span class="pre">boost::array<void*,size></span></tt> |
| to store the pointers. The class is useful when there is no requirement |
| of dynamic expansion and when no overhead is tolerable.</p> |
| <p><strong>Hierarchy:</strong></p> |
| <ul class="simple"> |
| <li><a class="reference" href="reversible_ptr_container.html">reversible_ptr_container</a><ul> |
| <li><a class="reference" href="ptr_sequence_adapter.html">ptr_sequence_adapter</a><ul> |
| <li><a class="reference" href="ptr_vector.html">ptr_vector</a></li> |
| <li><a class="reference" href="ptr_list.html">ptr_list</a></li> |
| <li><a class="reference" href="ptr_deque.html">ptr_deque</a></li> |
| <li><tt class="docutils literal"><span class="pre">ptr_array</span></tt></li> |
| </ul> |
| </li> |
| </ul> |
| </li> |
| </ul> |
| <p><strong>Navigate:</strong></p> |
| <ul class="simple"> |
| <li><a class="reference" href="ptr_container.html">home</a></li> |
| <li><a class="reference" href="reference.html">reference</a></li> |
| </ul> |
| <p><strong>Synopsis:</strong></p> |
| <pre class="literal-block"> |
| namespace boost |
| { |
| |
| template |
| < |
| class T, |
| size_t N, |
| CloneAllocator = heap_clone_allocator |
| > |
| class ptr_array : public <em>implementation-defined</em> |
| { |
| public: // <a class="reference" href="#construct-copy-destroy">construct/copy/destroy</a> |
| ptr_array(); |
| explicit ptr_array( const ptr_array& r ); |
| template< class U > |
| explicit ptr_array( const ptr_array<U,N>& r ); |
| explicit ptr_array( std::auto_ptr<ptr_array>& r ); |
| |
| ptr_array& operator=( const ptr_array& r ); |
| template< class U > |
| ptr_array& operator=( const ptr_array<U,N>& r ); |
| ptr_array& operator=( std::auto_ptr<this_type> r ); |
| |
| public: // <a class="reference" href="reversible_ptr_container.html#iterators">iterators</a> |
| |
| public: // <a class="reference" href="reversible_ptr_container.html#capacity">capacity</a> |
| |
| public: // <a class="reference" href="#element-access">element access</a> |
| T& front(); |
| const T& front() const; |
| T& back(); |
| const T& back() const; |
| |
| template< size_t idx > |
| T& at(); |
| template< size_t idx > |
| const T& at() const; |
| T& at( size_t ); |
| const T& at( size_t ); |
| |
| T& operator[]( size_t ); |
| const T& operator[]( size_t ) const; |
| |
| public: // <a class="reference" href="#modifiers">modifiers</a> |
| void swap( ptr_array& r ); |
| |
| template< size_t idx > |
| auto_type replace( T* r ); |
| template< size_t idx, class U > |
| auto_type replace( std::auto_ptr<U> r ); |
| auto_type replace( size_t idx, T* r ); |
| template< class U > |
| auto_type replace( size_t idx, std::auto_ptr<U> r ); |
| |
| public: // <a class="reference" href="#pointer-container-requirements">pointer container requirements</a> |
| std::auto_ptr<ptr_array> clone() const; |
| std::auto_ptr<ptr_array> release(); |
| template< size_t idx > |
| bool is_null() const; |
| bool is_null( size_t idx ) const; |
| |
| }; // class 'ptr_sequence_adapter' |
| |
| } // namespace 'boost' |
| </pre> |
| </div> |
| <div class="section"> |
| <h1><a id="semantics" name="semantics">Semantics</a></h1> |
| <div class="section"> |
| <h2><a id="semantics-construct-copy-destroy" name="semantics-construct-copy-destroy"><span id="construct-copy-destroy"></span>Semantics: construct/copy/destroy</a></h2> |
| <ul> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">ptr_array();</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: constructs array where each element is null</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">explicit</span> <span class="pre">ptr_array(</span> <span class="pre">const</span> <span class="pre">ptr_array&</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">class</span> <span class="pre">U</span> <span class="pre">></span> |
| <span class="pre">explicit</span> <span class="pre">ptr_array(</span> <span class="pre">const</span> <span class="pre">ptr_array<U,N>&</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <ul class="simple"> |
| <li>Effects: Constructs array by cloning <tt class="docutils literal"><span class="pre">r</span></tt></li> |
| </ul> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">ptr_array(</span> <span class="pre">std::auto_ptr<ptr_array>&</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: take ownership of the supplied pointers</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">ptr_array&</span> <span class="pre">operator=(</span> <span class="pre">const</span> <span class="pre">ptr_array&</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">class</span> <span class="pre">U</span> <span class="pre">></span> <span class="pre">ptr_array&</span> <span class="pre">operator=(</span> <span class="pre">const</span> <span class="pre">ptr_array<U,N>&</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: Assigns a clone of <tt class="docutils literal"><span class="pre">r</span></tt></li> |
| <li>Exception safety: Strong guarantee</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">ptr_array&</span> <span class="pre">operator=(</span> <span class="pre">std::auto_ptr<this_type></span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: take ownership of the supplied pointers</li> |
| <li>Throws: Nothing</li> |
| </ul> |
| </blockquote> |
| </li> |
| </ul> |
| </div> |
| <div class="section"> |
| <h2><a id="semantics-element-access" name="semantics-element-access"><span id="element-access"></span>Semantics: element access</a></h2> |
| <ul> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">T&</span> <span class="pre">front();</span></tt></p> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">const</span> <span class="pre">T&</span> <span class="pre">front()</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: <tt class="docutils literal"><span class="pre">not</span> <span class="pre">empty();</span></tt></li> |
| <li>Effects: <tt class="docutils literal"><span class="pre">return</span> <span class="pre">*begin();</span></tt></li> |
| <li>Throws: <tt class="docutils literal"><span class="pre">bad_ptr_container_operation</span></tt> if <tt class="docutils literal"><span class="pre">empty()</span> <span class="pre">==</span> <span class="pre">true</span></tt></li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">T&</span> <span class="pre">back();</span></tt></p> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">const</span> <span class="pre">T&</span> <span class="pre">back()</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: <tt class="docutils literal"><span class="pre">not</span> <span class="pre">empty();</span></tt></li> |
| <li>Effects: <tt class="docutils literal"><span class="pre">return</span> <span class="pre">*--end();</span></tt></li> |
| <li>Throws: <tt class="docutils literal"><span class="pre">bad_ptr_container_operation</span></tt> if <tt class="docutils literal"><span class="pre">empty()</span> <span class="pre">==</span> <span class="pre">true</span></tt></li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">size_t</span> <span class="pre">idx</span> <span class="pre">></span> <span class="pre">T&</span> <span class="pre">at(</span> <span class="pre">size_type</span> <span class="pre">n</span> <span class="pre">);</span></tt></p> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">size_t</span> <span class="pre">idx</span> <span class="pre">></span> <span class="pre">const</span> <span class="pre">T&</span> <span class="pre">at(</span> <span class="pre">size_type</span> <span class="pre">n</span> <span class="pre">)</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: <tt class="docutils literal"><span class="pre">idx</span> <span class="pre"><</span> <span class="pre">size()</span></tt> (compile-time enforced)</li> |
| <li>Effects: Returns a reference to the <tt class="docutils literal"><span class="pre">n</span></tt>'th element</li> |
| <li>Throws: nothing</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">T&</span> <span class="pre">at(</span> <span class="pre">size_type</span> <span class="pre">n</span> <span class="pre">);</span></tt></p> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">const</span> <span class="pre">T&</span> <span class="pre">at(</span> <span class="pre">size_type</span> <span class="pre">n</span> <span class="pre">)</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: <tt class="docutils literal"><span class="pre">n</span> <span class="pre"><</span> <span class="pre">size()</span></tt></li> |
| <li>Effects: Returns a reference to the <tt class="docutils literal"><span class="pre">n</span></tt>'th element</li> |
| <li>Throws: <tt class="docutils literal"><span class="pre">bad_index</span></tt> if <tt class="docutils literal"><span class="pre">n</span> <span class="pre">>=size()</span></tt></li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">T&</span> <span class="pre">operator[](</span> <span class="pre">size_type</span> <span class="pre">n</span> <span class="pre">);</span></tt></p> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">const</span> <span class="pre">T&</span> <span class="pre">operator[](</span> <span class="pre">size_type</span> <span class="pre">n</span> <span class="pre">)</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: <tt class="docutils literal"><span class="pre">n</span> <span class="pre"><</span> <span class="pre">size()</span></tt></li> |
| <li>Effects: Returns a reference to the <tt class="docutils literal"><span class="pre">n</span></tt>'th element</li> |
| <li>Throws: Nothing</li> |
| </ul> |
| </blockquote> |
| </li> |
| </ul> |
| </div> |
| <div class="section"> |
| <h2><a id="semantics-modifiers" name="semantics-modifiers"><span id="modifiers"></span>Semantics: modifiers</a></h2> |
| <ul> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">void</span> <span class="pre">swap(</span> <span class="pre">ptr_array&</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: swaps the two arrays</li> |
| <li>Complexity: Linear</li> |
| <li>Throws: nothing</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">size_t</span> <span class="pre">idx</span> <span class="pre">></span> <span class="pre">auto_type</span> <span class="pre">replace(</span> <span class="pre">T*</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul> |
| <li><p class="first">Requirements:</p> |
| <blockquote> |
| <ul class="simple"> |
| <li><tt class="docutils literal"><span class="pre">idx</span> <span class="pre"><</span> <span class="pre">size()</span></tt> (compile-time enforced)</li> |
| <li><tt class="docutils literal"><span class="pre">r</span> <span class="pre">!=</span> <span class="pre">0</span></tt></li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first">Effects: returns the object indexed by <tt class="docutils literal"><span class="pre">idx</span></tt> and replaces it with <tt class="docutils literal"><span class="pre">r</span></tt>.</p> |
| </li> |
| <li><p class="first">Throws: <tt class="docutils literal"><span class="pre">bad_pointer</span></tt> if <tt class="docutils literal"><span class="pre">x</span> <span class="pre">==</span> <span class="pre">0</span></tt>.</p> |
| </li> |
| <li><p class="first">Exception safety: Strong guarantee</p> |
| </li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">size_t</span> <span class="pre">idx,</span> <span class="pre">class</span> <span class="pre">U</span> <span class="pre">></span> <span class="pre">auto_type</span> <span class="pre">replace(</span> <span class="pre">std::auto_ptr<U></span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: <tt class="docutils literal"><span class="pre">return</span> <span class="pre">replace<idx>(</span> <span class="pre">r.release()</span> <span class="pre">);</span></tt></li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">auto_type</span> <span class="pre">replace(</span> <span class="pre">size_t</span> <span class="pre">idx,</span> <span class="pre">T*</span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: `` x != 0 and idx < size()``</li> |
| <li>Effects: returns the object indexed by <tt class="docutils literal"><span class="pre">idx</span></tt> and replaces it with <tt class="docutils literal"><span class="pre">x</span></tt>.</li> |
| <li>Throws: <tt class="docutils literal"><span class="pre">bad_index</span></tt> if <tt class="docutils literal"><span class="pre">idx</span> <span class="pre">>=</span> <span class="pre">size()</span></tt> and <tt class="docutils literal"><span class="pre">bad_pointer</span></tt> if <tt class="docutils literal"><span class="pre">x</span> <span class="pre">==</span> <span class="pre">0</span></tt>.</li> |
| <li>Exception safety: Strong guarantee</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">class</span> <span class="pre">U</span> <span class="pre">></span> <span class="pre">auto_type</span> <span class="pre">replace(</span> <span class="pre">size_t</span> <span class="pre">idx,</span> <span class="pre">std::auto_ptr<U></span> <span class="pre">r</span> <span class="pre">);</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: <tt class="docutils literal"><span class="pre">return</span> <span class="pre">replace(</span> <span class="pre">idx,</span> <span class="pre">r.release()</span> <span class="pre">);</span></tt></li> |
| </ul> |
| </blockquote> |
| </li> |
| </ul> |
| </div> |
| <div class="section"> |
| <h2><a id="semantics-pointer-container-requirements" name="semantics-pointer-container-requirements"><span id="pointer-container-requirements"></span>Semantics: pointer container requirements</a></h2> |
| <ul> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">std::auto_ptr<ptr_array></span> <span class="pre">clone()</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: Returns a deep copy of the container</li> |
| <li>Throws: <tt class="docutils literal"><span class="pre">std::bad_alloc</span></tt> if there is not enough memory to make a clone of the container</li> |
| <li>Complexity: Linear</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">std::auto_ptr<ptr_array></span> <span class="pre">release();</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Effects: Releases ownership of the container. This is a useful way of returning a container from a function.</li> |
| <li>Postconditions: <tt class="docutils literal"><span class="pre">empty()</span> <span class="pre">==</span> <span class="pre">true</span></tt> and all pointers are null</li> |
| <li>Throws: <tt class="docutils literal"><span class="pre">std::bad_alloc</span></tt> if the return value cannot be allocated</li> |
| <li>Exception safety: Strong guarantee</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">template<</span> <span class="pre">size_t</span> <span class="pre">idx</span> <span class="pre">></span> <span class="pre">bool</span> <span class="pre">is_null()</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: <tt class="docutils literal"><span class="pre">idx</span> <span class="pre"><</span> <span class="pre">size()</span></tt> (compile-time enforced)</li> |
| <li>Effects: returns whether the pointer at index <tt class="docutils literal"><span class="pre">idx</span></tt> is null</li> |
| <li>Exception safety: Nothrow guarantee</li> |
| </ul> |
| </blockquote> |
| </li> |
| <li><p class="first"><tt class="docutils literal"><span class="pre">bool</span> <span class="pre">is_null(</span> <span class="pre">size_type</span> <span class="pre">idx</span> <span class="pre">)</span> <span class="pre">const;</span></tt></p> |
| <blockquote> |
| <ul class="simple"> |
| <li>Requirements: <tt class="docutils literal"><span class="pre">idx</span> <span class="pre"><</span> <span class="pre">size()</span></tt></li> |
| <li>Effects: returns whether the pointer at index <tt class="docutils literal"><span class="pre">idx</span></tt> is null</li> |
| <li>Exception safety: Nothrow guarantee</li> |
| </ul> |
| </blockquote> |
| </li> |
| </ul> |
| <hr><table class="docutils field-list" frame="void" rules="none"> |
| <col class="field-name" /> |
| <col class="field-body" /> |
| <tbody valign="top"> |
| <tr class="field"><th class="field-name">Copyright:</th><td class="field-body">Thorsten Ottosen 2004-2006. Use, modification and distribution is subject to the Boost Software License, Version 1.0 (see <a class="reference" href="http://www.boost.org/LICENSE_1_0.txt">LICENSE_1_0.txt</a>).</td> |
| </tr> |
| </tbody> |
| </table> |
| </div> |
| </div> |
| </div> |
| </body> |
| </html> |