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290 <div class=
"document" id=
"boost-pointer-container-library">
291 <h1 class=
"title"><img alt=
"Boost" src=
"boost.png" /> Pointer Container Library
</h1>
292 <div class=
"section">
293 <h1><a id=
"class-ptr-vector" name=
"class-ptr-vector">Class
<tt class=
"docutils literal"><span class=
"pre">ptr_vector
</span></tt></a></h1>
294 <p>A
<tt class=
"docutils literal"><span class=
"pre">ptr_vector
<T
></span></tt> is a pointer container that uses an underlying
<tt class=
"docutils literal"><span class=
"pre">std::vector
<void*
></span></tt>
295 to store the pointers.
</p>
296 <p><strong>Hierarchy:
</strong></p>
298 <li><a class=
"reference" href=
"reversible_ptr_container.html">reversible_ptr_container
</a><ul>
299 <li><a class=
"reference" href=
"ptr_sequence_adapter.html">ptr_sequence_adapter
</a><ul>
300 <li><tt class=
"docutils literal"><span class=
"pre">ptr_vector
</span></tt></li>
301 <li><a class=
"reference" href=
"ptr_list.html">ptr_list
</a></li>
302 <li><a class=
"reference" href=
"ptr_deque.html">ptr_deque
</a></li>
303 <li><a class=
"reference" href=
"ptr_array.html">ptr_array
</a></li>
309 <p><strong>Navigate:
</strong></p>
311 <li><a class=
"reference" href=
"ptr_container.html">home
</a></li>
312 <li><a class=
"reference" href=
"reference.html">reference
</a></li>
314 <p><strong>Synopsis:
</strong></p>
315 <pre class=
"literal-block">
322 class CloneAllocator = heap_clone_allocator,
323 class Allocator = std::allocator
<void*
>
325 class ptr_vector : public ptr_sequence_adapter
328 std::vector
<void*,Allocator
>,
332 public: //
<a class=
"reference" href=
"#construction">construction
</a>
333 explicit ptr_vector( size_type to_reserve );
335 public: //
<a class=
"reference" href=
"#capacity">capacity
</a>
336 size_type capacity() const;
337 void reserve( size_type n );
339 public: //
<a class=
"reference" href=
"#element-access">element access
</a>
340 T
& operator[]( size_type n );
341 const T
& operator[]( size_type n ) const;
342 T
& at( size_type n );
343 const T
& at( size_type n ) const;
345 public: //
<a class=
"reference" href=
"#pointer-container-requirements">pointer container requirements
</a>
346 auto_type replace( size_type idx, T* x );
347 template
< class U
>
348 auto_type replace( size_type idx, std::auto_ptr
<U
> x );
349 bool is_null( size_type idx ) const;
351 public: //
<a class=
"reference" href=
"#c-array-support">C-array support
</a>
352 void transfer( iterator before, T** from, size_type size, bool delete_from = true );
357 } // namespace 'boost'
360 <div class=
"section">
361 <h1><a id=
"semantics" name=
"semantics">Semantics
</a></h1>
362 <div class=
"section">
363 <h2><a id=
"semantics-construction" name=
"semantics-construction"><span id=
"construction"></span>Semantics: construction
</a></h2>
365 <li><p class=
"first"><tt class=
"docutils literal"><span class=
"pre">explicit
</span> <span class=
"pre">ptr_vector(
</span> <span class=
"pre">size_type
</span> <span class=
"pre">to_reserve
</span> <span class=
"pre">);
</span></tt></p>
368 <li>constructs an empty vector with a buffer
369 of size least
<tt class=
"docutils literal"><span class=
"pre">to_reserve
</span></tt></li>
375 <div class=
"section">
376 <h2><a id=
"semantics-capacity" name=
"semantics-capacity"><span id=
"capacity"></span>Semantics: capacity
</a></h2>
378 <li><p class=
"first"><tt class=
"docutils literal"><span class=
"pre">size_type
</span> <span class=
"pre">capacity()
</span> <span class=
"pre">const;
</span></tt></p>
381 <li>Effects: Returns the size of the allocated buffer
</li>
382 <li>Throws: Nothing
</li>
386 <li><p class=
"first"><tt class=
"docutils literal"><span class=
"pre">void
</span> <span class=
"pre">reserve(
</span> <span class=
"pre">size_type
</span> <span class=
"pre">n
</span> <span class=
"pre">);
</span></tt></p>
389 <li>Requirements:
<tt class=
"docutils literal"><span class=
"pre">n
</span> <span class=
"pre"><=
</span> <span class=
"pre">max_size()
</span></tt></li>
390 <li>Effects: Expands the allocated buffer
</li>
391 <li>Postcondition:
<tt class=
"docutils literal"><span class=
"pre">capacity()
</span> <span class=
"pre">>=
</span> <span class=
"pre">n
</span></tt></li>
392 <li>Throws:
<tt class=
"docutils literal"><span class=
"pre">std::length_error()
</span></tt> if
<tt class=
"docutils literal"><span class=
"pre">n
</span> <span class=
"pre">></span> <span class=
"pre">max_size()
</span></tt></li>
398 <div class=
"section">
399 <h2><a id=
"semantics-element-access" name=
"semantics-element-access"><span id=
"element-access"></span>Semantics: element access
</a></h2>
401 <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>
403 <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>
406 <li>Requirements:
<tt class=
"docutils literal"><span class=
"pre">n
</span> <span class=
"pre"><</span> <span class=
"pre">size()
</span></tt></li>
407 <li>Effects: Returns a reference to the
<tt class=
"docutils literal"><span class=
"pre">n
</span></tt>'th element
</li>
408 <li>Throws: Nothing
</li>
412 <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>
414 <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>
417 <li>Requirements:
<tt class=
"docutils literal"><span class=
"pre">n
</span> <span class=
"pre"><</span> <span class=
"pre">size()
</span></tt></li>
418 <li>Effects: Returns a reference to the
<tt class=
"docutils literal"><span class=
"pre">n
</span></tt>'th element
</li>
419 <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">>=
</span> <span class=
"pre">size()
</span></tt></li>
425 <div class=
"section">
426 <h2><a id=
"semantics-pointer-container-requirements" name=
"semantics-pointer-container-requirements"><span id=
"pointer-container-requirements"></span>Semantics: pointer container requirements
</a></h2>
428 <li><p class=
"first"><tt class=
"docutils literal"><span class=
"pre">auto_type
</span> <span class=
"pre">replace(
</span> <span class=
"pre">size_type
</span> <span class=
"pre">idx,
</span> <span class=
"pre">T*
</span> <span class=
"pre">x
</span> <span class=
"pre">);
</span></tt></p>
431 <li>Requirements: `` x !=
0 and idx
< size()``
</li>
432 <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>
433 <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>
434 <li>Exception safety: Strong guarantee
</li>
438 <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_type
</span> <span class=
"pre">idx,
</span> <span class=
"pre">std::auto_ptr
<U
></span> <span class=
"pre">x
</span> <span class=
"pre">);
</span></tt></p>
441 <li>Effects:
<tt class=
"docutils literal"><span class=
"pre">return
</span> <span class=
"pre">replace(
</span> <span class=
"pre">idx,
</span> <span class=
"pre">x.release()
</span> <span class=
"pre">);
</span></tt></li>
445 <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>
448 <li>Requirements:
<tt class=
"docutils literal"><span class=
"pre">idx
</span> <span class=
"pre"><</span> <span class=
"pre">size()
</span></tt></li>
449 <li>Effects: returns whether the pointer at index
<tt class=
"docutils literal"><span class=
"pre">idx
</span></tt> is null
</li>
450 <li>Exception safety: Nothrow guarantee
</li>
456 <div class=
"section">
457 <h2><a id=
"semantics-c-array-support" name=
"semantics-c-array-support"><span id=
"c-array-support"></span>Semantics: C-array support
</a></h2>
459 <li><p class=
"first"><tt class=
"docutils literal"><span class=
"pre">void
</span> <span class=
"pre">transfer(
</span> <span class=
"pre">iterator
</span> <span class=
"pre">before,
</span> <span class=
"pre">T**
</span> <span class=
"pre">from,
</span> <span class=
"pre">size_type
</span> <span class=
"pre">size,
</span> <span class=
"pre">bool
</span> <span class=
"pre">delete_from
</span> <span class=
"pre">=
</span> <span class=
"pre">true
</span> <span class=
"pre">);
</span></tt></p>
462 <li>Requirements:
<tt class=
"docutils literal"><span class=
"pre">from
</span> <span class=
"pre">!=
</span> <span class=
"pre">0</span></tt></li>
463 <li>Effects: Takes ownership of the dynamic array
<tt class=
"docutils literal"><span class=
"pre">from
</span></tt></li>
464 <li>Exception safety: Strong guarantee if
<tt class=
"docutils literal"><span class=
"pre">delete_from
</span> <span class=
"pre">==
</span> <span class=
"pre">true
</span></tt>; if
<tt class=
"docutils literal"><span class=
"pre">delete_from
</span> <span class=
"pre">==
</span> <span class=
"pre">false
</span></tt>,
465 and an exception is thrown, the container fails to take ownership.
</li>
466 <li>Remarks: Eventually calls
<tt class=
"docutils literal"><span class=
"pre">delete[]
</span> <span class=
"pre">from
</span></tt> if
<tt class=
"docutils literal"><span class=
"pre">delete_from
</span> <span class=
"pre">==
</span> <span class=
"pre">true
</span></tt>.
</li>
470 <li><p class=
"first"><tt class=
"docutils literal"><span class=
"pre">T**
</span> <span class=
"pre">c_array();
</span></tt></p>
473 <li>Returns:
<tt class=
"docutils literal"><span class=
"pre">0</span></tt> if the container is empty; otherwise a pointer to the first element of the stored array
</li>
474 <li>Throws: Nothing
</li>
479 <hr><table class=
"docutils field-list" frame=
"void" rules=
"none">
480 <col class=
"field-name" />
481 <col class=
"field-body" />
483 <tr class=
"field"><th class=
"field-name">Copyright:
</th><td class=
"field-body">Thorsten Ottosen
2004-
2007. 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>