Using tolower in transform

[TheDD]

Hello,

i don't manage to use the tolower() function:

#include <algorithm>
#include <iostream>
#include <locale>
#include <string>

using std::cout;
using std::ctype;
using std::endl;
using std::locale;
using std::string;
using std::transform;
using std::use_facet;

typedef ctype< char > char_ctype_face t;

int
main()
{
locale loc("");
const char_ctype_face t& ct = use_facet< char_ctype_face t >(loc);
string str("Hello world.");

transform(str.b egin(), str.end(),
str.begin(), ct.tolower);

cout << str << endl;
return 0;
}

$ g++ -W -Wall -std=c++98 -pedantic tolower.cc
tolower.cc: In function `int main()':
tolower.cc:24: error: no matching function for call to
`transform(__gn u_cxx::__normal _iterator<char* , std::basic_stri ng<char,
std::char_trait s<char>, std::allocator< char> > >,
__gnu_cxx::__no rmal_iterator<c har*, std::basic_stri ng<char,
std::char_trait s<char>, std::allocator< char> > >,
__gnu_cxx::__no rmal_iterator<c har*, std::basic_stri ng<char,
std::char_trait s<char>, std::allocator< char> > >, <unknown type>)'

ct.tolower is <unknow type>

What am i doing wrong?

--
TheDD

[Klaus Eichner]

"TheDD" <pa*********@pa s.de.spam.fr> wrote in message
news:c9******** **@news-reader5.wanadoo .fr...

Hello,

i don't manage to use the tolower() function:

#include <algorithm>
#include <iostream>
#include <locale>
#include <string>

using std::cout;
using std::ctype;
using std::endl;
using std::locale;
using std::string;
using std::transform;
using std::use_facet;

typedef ctype< char > char_ctype_face t;

int
main()
{
locale loc("");
const char_ctype_face t& ct = use_facet< char_ctype_face t >(loc);
string str("Hello world.");

transform(str.b egin(), str.end(),
str.begin(), ct.tolower);

cout << str << endl;
return 0;
}

$ g++ -W -Wall -std=c++98 -pedantic tolower.cc
tolower.cc: In function `int main()':
tolower.cc:24: error: no matching function for call to
`transform(__gn u_cxx::__normal _iterator<char* , std::basic_stri ng<char,
std::char_trait s<char>, std::allocator< char> > >,
__gnu_cxx::__no rmal_iterator<c har*, std::basic_stri ng<char,
std::char_trait s<char>, std::allocator< char> > >,
__gnu_cxx::__no rmal_iterator<c har*, std::basic_stri ng<char,
std::char_trait s<char>, std::allocator< char> > >, <unknown type>)'

ct.tolower is <unknow type>

What am i doing wrong?
I am not sure, but it might be related to:
Bug#144409: g++-3.0: does not support transform(begin ,end,begin,tolo wer)
idiom
http://lists.debian.org/debian-gcc/2.../msg00092.html

--
TheDD

[TheDD]

Le 29/05/2004 à 02:11:45, Victor Bazarov <v.********@com Acast.net> a
écrit:

If you have to use a member function, try something like

std::transform( str.begin(), str.end(), str.begin(),
std::bind1st(st d::mem_fun(&cty pe<char>::tolow er), ct));

I couldn't get it to compile, but dig in that direction.

Well i don't have a member function.

If you didn't, why were you trying to say

ct.tolower

? Isn't the notation '.' meant for member access? I must
be missing something here...

My mistake, sorry :p

--
TheDD