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Re: Some 'missing' string functions [message #13777 is a reply to message #13754]

Sat, 26 January 2008 14:06

mdelfede is currently offline

mdelfede
Messages: 1310
Registered: September 2007

Ultimate Contributor

luzr wrote on Fri, 25 January 2008 23:09

Quote:

find_first_not_of(), find_first_of(), find_last_not_of()

BTW, do you know whether STL somehow optimizes these?

I am rather thinking about adding "Filter" variant here...

void FindFirst(int (*filter)(int c), int from = 0)

you'd need also

void FindFirst(int (*filter)(char *s), int from = 0)

as std:: has also such functions. For example :

int i = s.find_first_not_of("ab", 5)

gives the index of first character in s starting from index 5 which is neither 'a' nor 'b'.
That's useful to skip some character in a line, used for example in Astyle to skip spaces and tabs :

int i = s.find_first_not_of(" \t", 5)

The filter idea is not bad at all, and you could also add some wrapper for simpler cases.

BTW, another stuf I think is missing is a constant that is returned when no match is found. std:: uses string::npos, which should have a value of -1 but makes code reading easer.

Ciao

Max

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[Message index]

		Some 'missing' string functions By: mdelfede on Fri, 25 January 2008 12:37
		Re: Some 'missing' string functions By: mirek on Fri, 25 January 2008 23:05
		Re: Some 'missing' string functions By: mirek on Fri, 25 January 2008 23:09
		Re: Some 'missing' string functions By: mdelfede on Sat, 26 January 2008 14:06
		Re: Some 'missing' string functions By: mirek on Sat, 26 January 2008 14:24
		Re: Some 'missing' string functions By: mdelfede on Sat, 26 January 2008 14:49
		Re: Some 'missing' string functions By: phirox on Fri, 06 June 2008 23:21
		Re: Some 'missing' string functions By: mirek on Sat, 07 June 2008 16:12
		Re: Some 'missing' string functions By: mr_ped on Mon, 09 June 2008 08:32
		Re: Some 'missing' string functions By: hans on Mon, 09 June 2008 10:51
		Re: Some 'missing' string functions By: mirek on Mon, 09 June 2008 14:27
		Re: Some 'missing' string functions By: mirek on Mon, 09 June 2008 14:28
		Re: Some 'missing' string functions By: captainc on Thu, 28 August 2008 10:13
		Re: Some 'missing' string functions By: mirek on Thu, 28 August 2008 15:19

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