Article View: comp.std.c++
Article #3914Re: strings as stl container
From: Joe Buck
Date: Thu, 04 Apr 1996 18:15
Date: Thu, 04 Apr 1996 18:15
62 lines
2531 bytes
2531 bytes
Nico Josuttis <nico@bredex.de> writes:
>Due to the fact that strings have iterator support,
>the could be used as stl container.
Correct.
>But two things are missing:
> - push_back()
> - clear()
No, these are not needed.
>These are fundamental operations, that the corresponding "normal"
>container, namely vector, has.
The documentation I have does not list clear as a member of vector.
>Especially push_back() would be essential to use insert iterators
>for strings.
No, this isn't true. You need push_back to use back_insert_iterator,
but insert_iterator only needs insert, which string does have.
Try the following program (works with gcc 2.7.2/libg++ 2.7.1 and appears
to conform to the standard if I didn't screw up):
----------------------
#include <string>
#include <iterator>
#include <algorithm>
const char text[] = "This is text\n";
const char text2[] = "even more ";
int main()
{
string foo;
insert_iterator<string> iter = inserter(foo, foo.begin());
copy(text, text + sizeof(text)-1, iter);
cout << "value of foo: " << foo;
copy(text2, text2 + sizeof(text2)-1, inserter(foo, foo.begin()+8));
cout << "value of foo: " << foo;
}
----------------------
This prints
value of foo: This is text
value of foo: This is even more text
--
-- Joe Buck <jbuck@synopsys.com> (not speaking for Synopsys, Inc)
Work for something because it is good,
not just because it stands a chance to succeed. -- Vaclav Havel
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Path: arc1-ca.pugleaf.net!fido.asd.sgi.com!austern From: jbuck@Synopsys.COM (Joe Buck) Newsgroups: comp.std.c++ Subject: Re: strings as stl container Date: 04 Apr 1996 10:15:18 PST Organization: Synopsys Inc., Mountain View, CA 94043-4033 Approved: austern@isolde.mti.sgi.com Message-ID: <4jvdnd$c9c@hermes.synopsys.com> References: <199604020907.LAA06972@bredex.bredex.de> NNTP-Posting-Host: isolde.mti.sgi.com X-Original-Date: 4 Apr 1996 02:55:41 GMT X-Auth: PGPMoose V1.1 PGP comp.std.c++ iQBVAwUBMWQRt0y4NqrwXLNJAQFVCwIAli45uYsIJxE/R7zrjj+vOhMBEpH7hbp2 bib37fRT6wJV7ocVQ0EEsjKlfEhnbD/9uizBlUIGUE/a9VVIezCToQ== =lh7T Originator: austern@isolde.mti.sgi.com