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source: downloads/boost_1_34_1/boost/algorithm/string/erase.hpp @ 46

Last change on this file since 46 was 29, checked in by landauf, 17 years ago
updated boost from 1_33_1 to 1_34_1
File size: 29.2 KB

Line
1	// Boost string_algo library erase.hpp header file ---------------------------//
2
3	// Copyright Pavol Droba 2002-2006. Use, modification and
4	// distribution is subject to the Boost Software License, Version
5	// 1.0. (See accompanying file LICENSE_1_0.txt or copy at
6	// http://www.boost.org/LICENSE_1_0.txt)
7
8	// See http://www.boost.org for updates, documentation, and revision history.
9
10	#ifndef BOOST_STRING_ERASE_HPP
11	#define BOOST_STRING_ERASE_HPP
12
13	#include <boost/algorithm/string/config.hpp>
14
15	#include <boost/range/iterator_range.hpp>
16	#include <boost/range/begin.hpp>
17	#include <boost/range/end.hpp>
18	#include <boost/range/iterator.hpp>
19	#include <boost/range/const_iterator.hpp>
20
21	#include <boost/algorithm/string/find_format.hpp>
22	#include <boost/algorithm/string/finder.hpp>
23	#include <boost/algorithm/string/formatter.hpp>
24
25	/*! \file
26	Defines various erase algorithms. Each algorithm removes
27	part(s) of the input according to a searching criteria.
28	*/
29
30	namespace boost {
31	namespace algorithm {
32
33	// erase_range -------------------------------------------------------//
34
35	//! Erase range algorithm
36	/*!
37	Remove the given range from the input. The result is a modified copy of
38	the input. It is returned as a sequence or copied to the output iterator.
39
40	\param Output An output iterator to which the result will be copied
41	\param Input An input sequence
42	\param SearchRange A range in the input to be removed
43	\return An output iterator pointing just after the last inserted character or
44	a modified copy of the input
45
46	\note The second variant of this function provides the strong exception-safety guarantee
47	*/
48	template<typename OutputIteratorT, typename RangeT>
49	inline OutputIteratorT erase_range_copy(
50	OutputIteratorT Output,
51	const RangeT& Input,
52	const iterator_range<
53	BOOST_STRING_TYPENAME
54	range_const_iterator<RangeT>::type>& SearchRange )
55	{
56	return find_format_copy(
57	Output,
58	Input,
59	range_finder(SearchRange),
60	empty_formatter(Input) );
61	}
62
63	//! Erase range algorithm
64	/*!
65	\overload
66	*/
67	template<typename SequenceT>
68	inline SequenceT erase_range_copy(
69	const SequenceT& Input,
70	const iterator_range<
71	BOOST_STRING_TYPENAME
72	range_const_iterator<SequenceT>::type>& SearchRange )
73	{
74	return find_format_copy(
75	Input,
76	range_finder(SearchRange),
77	empty_formatter(Input) );
78	}
79
80	//! Erase range algorithm
81	/*!
82	Remove the given range from the input.
83	The input sequence is modified in-place.
84
85	\param Input An input sequence
86	\param SearchRange A range in the input to be removed
87	*/
88	template<typename SequenceT>
89	inline void erase_range(
90	SequenceT& Input,
91	const iterator_range<
92	BOOST_STRING_TYPENAME
93	range_iterator<SequenceT>::type>& SearchRange )
94	{
95	find_format(
96	Input,
97	range_finder(SearchRange),
98	empty_formatter(Input) );
99	}
100
101	// erase_first --------------------------------------------------------//
102
103	//! Erase first algorithm
104	/*!
105	Remove the first occurrence of the substring from the input.
106	The result is a modified copy of the input. It is returned as a sequence
107	or copied to the output iterator.
108
109	\param Output An output iterator to which the result will be copied
110	\param Input An input string
111	\param Search A substring to be searched for
112	\return An output iterator pointing just after the last inserted character or
113	a modified copy of the input
114
115	\note The second variant of this function provides the strong exception-safety guarantee
116	*/
117	template<
118	typename OutputIteratorT,
119	typename Range1T,
120	typename Range2T>
121	inline OutputIteratorT erase_first_copy(
122	OutputIteratorT Output,
123	const Range1T& Input,
124	const Range2T& Search )
125	{
126	return find_format_copy(
127	Output,
128	Input,
129	first_finder(Search),
130	empty_formatter(Input) );
131	}
132
133	//! Erase first algorithm
134	/*!
135	\overload
136	*/
137	template<typename SequenceT, typename RangeT>
138	inline SequenceT erase_first_copy(
139	const SequenceT& Input,
140	const RangeT& Search )
141	{
142	return find_format_copy(
143	Input,
144	first_finder(Search),
145	empty_formatter(Input) );
146	}
147
148	//! Erase first algorithm
149	/*!
150	Remove the first occurrence of the substring from the input.
151	The input sequence is modified in-place.
152
153	\param Input An input string
154	\param Search A substring to be searched for.
155	*/
156	template<typename SequenceT, typename RangeT>
157	inline void erase_first(
158	SequenceT& Input,
159	const RangeT& Search )
160	{
161	find_format(
162	Input,
163	first_finder(Search),
164	empty_formatter(Input) );
165	}
166
167	// erase_first ( case insensitive ) ------------------------------------//
168
169	//! Erase first algorithm ( case insensitive )
170	/*!
171	Remove the first occurrence of the substring from the input.
172	The result is a modified copy of the input. It is returned as a sequence
173	or copied to the output iterator.
174	Searching is case insensitive.
175
176	\param Output An output iterator to which the result will be copied
177	\param Input An input string
178	\param Search A substring to be searched for
179	\param Loc A locale used for case insensitive comparison
180	\return An output iterator pointing just after the last inserted character or
181	a modified copy of the input
182
183	\note The second variant of this function provides the strong exception-safety guarantee
184	*/
185	template<
186	typename OutputIteratorT,
187	typename Range1T,
188	typename Range2T>
189	inline OutputIteratorT ierase_first_copy(
190	OutputIteratorT Output,
191	const Range1T& Input,
192	const Range2T& Search,
193	const std::locale& Loc=std::locale() )
194	{
195	return find_format_copy(
196	Output,
197	Input,
198	first_finder(Search, is_iequal(Loc)),
199	empty_formatter(Input) );
200	}
201
202	//! Erase first algorithm ( case insensitive )
203	/*!
204	\overload
205	*/
206	template<typename SequenceT, typename RangeT>
207	inline SequenceT ierase_first_copy(
208	const SequenceT& Input,
209	const RangeT& Search,
210	const std::locale& Loc=std::locale() )
211	{
212	return find_format_copy(
213	Input,
214	first_finder(Search, is_iequal(Loc)),
215	empty_formatter(Input) );
216	}
217
218	//! Erase first algorithm ( case insensitive )
219	/*!
220	Remove the first occurrence of the substring from the input.
221	The input sequence is modified in-place. Searching is case insensitive.
222
223	\param Input An input string
224	\param Search A substring to be searched for
225	\param Loc A locale used for case insensitive comparison
226	*/
227	template<typename SequenceT, typename RangeT>
228	inline void ierase_first(
229	SequenceT& Input,
230	const RangeT& Search,
231	const std::locale& Loc=std::locale() )
232	{
233	find_format(
234	Input,
235	first_finder(Search, is_iequal(Loc)),
236	empty_formatter(Input) );
237	}
238
239	// erase_last --------------------------------------------------------//
240
241	//! Erase last algorithm
242	/*!
243	Remove the last occurrence of the substring from the input.
244	The result is a modified copy of the input. It is returned as a sequence
245	or copied to the output iterator.
246
247	\param Output An output iterator to which the result will be copied
248	\param Input An input string
249	\param Search A substring to be searched for.
250	\return An output iterator pointing just after the last inserted character or
251	a modified copy of the input
252
253	\note The second variant of this function provides the strong exception-safety guarantee
254	*/
255	template<
256	typename OutputIteratorT,
257	typename Range1T,
258	typename Range2T>
259	inline OutputIteratorT erase_last_copy(
260	OutputIteratorT Output,
261	const Range1T& Input,
262	const Range2T& Search )
263	{
264	return find_format_copy(
265	Output,
266	Input,
267	last_finder(Search),
268	empty_formatter(Input) );
269	}
270
271	//! Erase last algorithm
272	/*!
273	\overload
274	*/
275	template<typename SequenceT, typename RangeT>
276	inline SequenceT erase_last_copy(
277	const SequenceT& Input,
278	const RangeT& Search )
279	{
280	return find_format_copy(
281	Input,
282	last_finder(Search),
283	empty_formatter(Input) );
284	}
285
286	//! Erase last algorithm
287	/*!
288	Remove the last occurrence of the substring from the input.
289	The input sequence is modified in-place.
290
291	\param Input An input string
292	\param Search A substring to be searched for
293	*/
294	template<typename SequenceT, typename RangeT>
295	inline void erase_last(
296	SequenceT& Input,
297	const RangeT& Search )
298	{
299	find_format(
300	Input,
301	last_finder(Search),
302	empty_formatter(Input) );
303	}
304
305	// erase_last ( case insensitive ) ------------------------------------//
306
307	//! Erase last algorithm ( case insensitive )
308	/*!
309	Remove the last occurrence of the substring from the input.
310	The result is a modified copy of the input. It is returned as a sequence
311	or copied to the output iterator.
312	Searching is case insensitive.
313
314	\param Output An output iterator to which the result will be copied
315	\param Input An input string
316	\param Search A substring to be searched for
317	\param Loc A locale used for case insensitive comparison
318	\return An output iterator pointing just after the last inserted character or
319	a modified copy of the input
320
321	\note The second variant of this function provides the strong exception-safety guarantee
322	*/
323	template<
324	typename OutputIteratorT,
325	typename Range1T,
326	typename Range2T>
327	inline OutputIteratorT ierase_last_copy(
328	OutputIteratorT Output,
329	const Range1T& Input,
330	const Range2T& Search,
331	const std::locale& Loc=std::locale() )
332	{
333	return find_format_copy(
334	Output,
335	Input,
336	last_finder(Search, is_iequal(Loc)),
337	empty_formatter(Input) );
338	}
339
340	//! Erase last algorithm ( case insensitive )
341	/*!
342	\overload
343	*/
344	template<typename SequenceT, typename RangeT>
345	inline SequenceT ierase_last_copy(
346	const SequenceT& Input,
347	const RangeT& Search,
348	const std::locale& Loc=std::locale() )
349	{
350	return find_format_copy(
351	Input,
352	last_finder(Search, is_iequal(Loc)),
353	empty_formatter(Input) );
354	}
355
356	//! Erase last algorithm ( case insensitive )
357	/*!
358	Remove the last occurrence of the substring from the input.
359	The input sequence is modified in-place. Searching is case insensitive.
360
361	\param Input An input string
362	\param Search A substring to be searched for
363	\param Loc A locale used for case insensitive comparison
364	*/
365	template<typename SequenceT, typename RangeT>
366	inline void ierase_last(
367	SequenceT& Input,
368	const RangeT& Search,
369	const std::locale& Loc=std::locale() )
370	{
371	find_format(
372	Input,
373	last_finder(Search, is_iequal(Loc)),
374	empty_formatter(Input) );
375	}
376
377	// erase_nth --------------------------------------------------------------------//
378
379	//! Erase nth algorithm
380	/*!
381	Remove the Nth occurrence of the substring in the input.
382	The result is a modified copy of the input. It is returned as a sequence
383	or copied to the output iterator.
384
385
386	\param Output An output iterator to which the result will be copied
387	\param Input An input string
388	\param Search A substring to be searched for
389	\param Nth An index of the match to be replaced. The index is 0-based.
390	For negative N, matches are counted from the end of string.
391	\return An output iterator pointing just after the last inserted character or
392	a modified copy of the input
393
394	\note The second variant of this function provides the strong exception-safety guarantee
395	*/
396	template<
397	typename OutputIteratorT,
398	typename Range1T,
399	typename Range2T>
400	inline OutputIteratorT erase_nth_copy(
401	OutputIteratorT Output,
402	const Range1T& Input,
403	const Range2T& Search,
404	int Nth )
405	{
406	return find_format_copy(
407	Output,
408	Input,
409	nth_finder(Search, Nth),
410	empty_formatter(Input) );
411	}
412
413	//! Erase nth algorithm
414	/*!
415	\overload
416	*/
417	template<typename SequenceT, typename RangeT>
418	inline SequenceT erase_nth_copy(
419	const SequenceT& Input,
420	const RangeT& Search,
421	int Nth )
422	{
423	return find_format_copy(
424	Input,
425	nth_finder(Search, Nth),
426	empty_formatter(Input) );
427	}
428
429	//! Erase nth algorithm
430	/*!
431	Remove the Nth occurrence of the substring in the input.
432	The input sequence is modified in-place.
433
434	\param Input An input string
435	\param Search A substring to be searched for.
436	\param Nth An index of the match to be replaced. The index is 0-based.
437	For negative N, matches are counted from the end of string.
438	*/
439	template<typename SequenceT, typename RangeT>
440	inline void erase_nth(
441	SequenceT& Input,
442	const RangeT& Search,
443	int Nth )
444	{
445	find_format(
446	Input,
447	nth_finder(Search, Nth),
448	empty_formatter(Input) );
449	}
450
451	// erase_nth ( case insensitive ) ---------------------------------------------//
452
453	//! Erase nth algorithm ( case insensitive )
454	/*!
455	Remove the Nth occurrence of the substring in the input.
456	The result is a modified copy of the input. It is returned as a sequence
457	or copied to the output iterator.
458	Searching is case insensitive.
459
460	\param Output An output iterator to which the result will be copied
461	\param Input An input string
462	\param Search A substring to be searched for.
463	\param Nth An index of the match to be replaced. The index is 0-based.
464	For negative N, matches are counted from the end of string.
465	\param Loc A locale used for case insensitive comparison
466	\return An output iterator pointing just after the last inserted character or
467	a modified copy of the input
468
469	\note The second variant of this function provides the strong exception-safety guarantee
470	*/
471	template<
472	typename OutputIteratorT,
473	typename Range1T,
474	typename Range2T>
475	inline OutputIteratorT ierase_nth_copy(
476	OutputIteratorT Output,
477	const Range1T& Input,
478	const Range2T& Search,
479	int Nth,
480	const std::locale& Loc=std::locale() )
481	{
482	return find_format_copy(
483	Output,
484	Input,
485	nth_finder(Search, Nth, is_iequal(Loc)),
486	empty_formatter(Input) );
487	}
488
489	//! Erase nth algorithm
490	/*!
491	\overload
492	*/
493	template<typename SequenceT, typename RangeT>
494	inline SequenceT ierase_nth_copy(
495	const SequenceT& Input,
496	const RangeT& Search,
497	int Nth,
498	const std::locale& Loc=std::locale() )
499	{
500	return find_format_copy(
501	Input,
502	nth_finder(Search, Nth, is_iequal(Loc)),
503	empty_formatter(Input) );
504	}
505
506	//! Erase nth algorithm
507	/*!
508	Remove the Nth occurrence of the substring in the input.
509	The input sequence is modified in-place. Searching is case insensitive.
510
511	\param Input An input string
512	\param Search A substring to be searched for.
513	\param Nth An index of the match to be replaced. The index is 0-based.
514	For negative N, matches are counted from the end of string.
515	\param Loc A locale used for case insensitive comparison
516	*/
517	template<typename SequenceT, typename RangeT>
518	inline void ierase_nth(
519	SequenceT& Input,
520	const RangeT& Search,
521	int Nth,
522	const std::locale& Loc=std::locale() )
523	{
524	find_format(
525	Input,
526	nth_finder(Search, Nth, is_iequal(Loc)),
527	empty_formatter(Input) );
528	}
529
530
531	// erase_all --------------------------------------------------------//
532
533	//! Erase all algorithm
534	/*!
535	Remove all the occurrences of the string from the input.
536	The result is a modified copy of the input. It is returned as a sequence
537	or copied to the output iterator.
538
539
540	\param Output An output iterator to which the result will be copied
541	\param Input An input sequence
542	\param Search A substring to be searched for.
543	\return An output iterator pointing just after the last inserted character or
544	a modified copy of the input
545
546	\note The second variant of this function provides the strong exception-safety guarantee
547	*/
548	template<
549	typename OutputIteratorT,
550	typename Range1T,
551	typename Range2T>
552	inline OutputIteratorT erase_all_copy(
553	OutputIteratorT Output,
554	const Range1T& Input,
555	const Range2T& Search )
556	{
557	return find_format_all_copy(
558	Output,
559	Input,
560	first_finder(Search),
561	empty_formatter(Input) );
562	}
563
564	//! Erase all algorithm
565	/*!
566	\overload
567	*/
568	template<typename SequenceT, typename RangeT>
569	inline SequenceT erase_all_copy(
570	const SequenceT& Input,
571	const RangeT& Search )
572	{
573	return find_format_all_copy(
574	Input,
575	first_finder(Search),
576	empty_formatter(Input) );
577	}
578
579	//! Erase all algorithm
580	/*!
581	Remove all the occurrences of the string from the input.
582	The input sequence is modified in-place.
583
584	\param Input An input string
585	\param Search A substring to be searched for.
586	*/
587	template<typename SequenceT, typename RangeT>
588	inline void erase_all(
589	SequenceT& Input,
590	const RangeT& Search )
591	{
592	find_format_all(
593	Input,
594	first_finder(Search),
595	empty_formatter(Input) );
596	}
597
598	// erase_all ( case insensitive ) ------------------------------------//
599
600	//! Erase all algorithm ( case insensitive )
601	/*!
602	Remove all the occurrences of the string from the input.
603	The result is a modified copy of the input. It is returned as a sequence
604	or copied to the output iterator.
605	Searching is case insensitive.
606
607	\param Output An output iterator to which the result will be copied
608	\param Input An input string
609	\param Search A substring to be searched for
610	\param Loc A locale used for case insensitive comparison
611	\return An output iterator pointing just after the last inserted character or
612	a modified copy of the input
613
614	\note The second variant of this function provides the strong exception-safety guarantee
615	*/
616	template<
617	typename OutputIteratorT,
618	typename Range1T,
619	typename Range2T>
620	inline OutputIteratorT ierase_all_copy(
621	OutputIteratorT Output,
622	const Range1T& Input,
623	const Range2T& Search,
624	const std::locale& Loc=std::locale() )
625	{
626	return find_format_all_copy(
627	Output,
628	Input,
629	first_finder(Search, is_iequal(Loc)),
630	empty_formatter(Input) );
631	}
632
633	//! Erase all algorithm ( case insensitive )
634	/*!
635	\overload
636	*/
637	template<typename SequenceT, typename RangeT>
638	inline SequenceT ierase_all_copy(
639	const SequenceT& Input,
640	const RangeT& Search,
641	const std::locale& Loc=std::locale() )
642	{
643	return find_format_all_copy(
644	Input,
645	first_finder(Search, is_iequal(Loc)),
646	empty_formatter(Input) );
647	}
648
649	//! Erase all algorithm ( case insensitive )
650	/*!
651	Remove all the occurrences of the string from the input.
652	The input sequence is modified in-place. Searching is case insensitive.
653
654	\param Input An input string
655	\param Search A substring to be searched for.
656	\param Loc A locale used for case insensitive comparison
657	*/
658	template<typename SequenceT, typename RangeT>
659	inline void ierase_all(
660	SequenceT& Input,
661	const RangeT& Search,
662	const std::locale& Loc=std::locale() )
663	{
664	find_format_all(
665	Input,
666	first_finder(Search, is_iequal(Loc)),
667	empty_formatter(Input) );
668	}
669
670	// erase_head --------------------------------------------------------------------//
671
672	//! Erase head algorithm
673	/*!
674	Remove the head from the input. The head is a prefix of a sequence of given size.
675	If the sequence is shorter then required, the whole string is
676	considered to be the head. The result is a modified copy of the input.
677	It is returned as a sequence or copied to the output iterator.
678
679
680	\param Output An output iterator to which the result will be copied
681	\param Input An input string
682	\param N Length of the head.
683	For N>=0, at most N characters are extracted.
684	For N<0, size(Input)-\|N\| characters are extracted.
685	\return An output iterator pointing just after the last inserted character or
686	a modified copy of the input
687
688	\note The second variant of this function provides the strong exception-safety guarantee
689	*/
690	template<
691	typename OutputIteratorT,
692	typename RangeT>
693	inline OutputIteratorT erase_head_copy(
694	OutputIteratorT Output,
695	const RangeT& Input,
696	int N )
697	{
698	return find_format_copy(
699	Output,
700	Input,
701	head_finder(N),
702	empty_formatter( Input ) );
703	}
704
705	//! Erase head algorithm
706	/*!
707	\overload
708	*/
709	template<typename SequenceT>
710	inline SequenceT erase_head_copy(
711	const SequenceT& Input,
712	int N )
713	{
714	return find_format_copy(
715	Input,
716	head_finder(N),
717	empty_formatter( Input ) );
718	}
719
720	//! Erase head algorithm
721	/*!
722	Remove the head from the input. The head is a prefix of a sequence of given size.
723	If the sequence is shorter then required, the whole string is
724	considered to be the head. The input sequence is modified in-place.
725
726	\param Input An input string
727	\param N Length of the head
728	For N>=0, at most N characters are extracted.
729	For N<0, size(Input)-\|N\| characters are extracted.
730	*/
731	template<typename SequenceT>
732	inline void erase_head(
733	SequenceT& Input,
734	int N )
735	{
736	find_format(
737	Input,
738	head_finder(N),
739	empty_formatter( Input ) );
740	}
741
742	// erase_tail --------------------------------------------------------------------//
743
744	//! Erase tail algorithm
745	/*!
746	Remove the tail from the input. The tail is a suffix of a sequence of given size.
747	If the sequence is shorter then required, the whole string is
748	considered to be the tail.
749	The result is a modified copy of the input. It is returned as a sequence
750	or copied to the output iterator.
751
752	\param Output An output iterator to which the result will be copied
753	\param Input An input string
754	\param N Length of the head.
755	For N>=0, at most N characters are extracted.
756	For N<0, size(Input)-\|N\| characters are extracted.
757	\return An output iterator pointing just after the last inserted character or
758	a modified copy of the input
759
760	\note The second variant of this function provides the strong exception-safety guarantee
761	*/
762	template<
763	typename OutputIteratorT,
764	typename RangeT>
765	inline OutputIteratorT erase_tail_copy(
766	OutputIteratorT Output,
767	const RangeT& Input,
768	int N )
769	{
770	return find_format_copy(
771	Output,
772	Input,
773	tail_finder(N),
774	empty_formatter( Input ) );
775	}
776
777	//! Erase tail algorithm
778	/*!
779	\overload
780	*/
781	template<typename SequenceT>
782	inline SequenceT erase_tail_copy(
783	const SequenceT& Input,
784	int N )
785	{
786	return find_format_copy(
787	Input,
788	tail_finder(N),
789	empty_formatter( Input ) );
790	}
791
792	//! Erase tail algorithm
793	/*!
794	Remove the tail from the input. The tail is a suffix of a sequence of given size.
795	If the sequence is shorter then required, the whole string is
796	considered to be the tail. The input sequence is modified in-place.
797
798	\param Input An input string
799	\param N Length of the head
800	For N>=0, at most N characters are extracted.
801	For N<0, size(Input)-\|N\| characters are extracted.
802	*/
803	template<typename SequenceT>
804	inline void erase_tail(
805	SequenceT& Input,
806	int N )
807	{
808	find_format(
809	Input,
810	tail_finder(N),
811	empty_formatter( Input ) );
812	}
813
814	} // namespace algorithm
815
816	// pull names into the boost namespace
817	using algorithm::erase_range_copy;
818	using algorithm::erase_range;
819	using algorithm::erase_first_copy;
820	using algorithm::erase_first;
821	using algorithm::ierase_first_copy;
822	using algorithm::ierase_first;
823	using algorithm::erase_last_copy;
824	using algorithm::erase_last;
825	using algorithm::ierase_last_copy;
826	using algorithm::ierase_last;
827	using algorithm::erase_nth_copy;
828	using algorithm::erase_nth;
829	using algorithm::ierase_nth_copy;
830	using algorithm::ierase_nth;
831	using algorithm::erase_all_copy;
832	using algorithm::erase_all;
833	using algorithm::ierase_all_copy;
834	using algorithm::ierase_all;
835	using algorithm::erase_head_copy;
836	using algorithm::erase_head;
837	using algorithm::erase_tail_copy;
838	using algorithm::erase_tail;
839
840	} // namespace boost
841
842
843	#endif // BOOST_ERASE_HPP

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