Re: Strings with Templates not working?

From:

Obnoxious User <OU@127.0.0.1>

Newsgroups:

comp.lang.c++

Date:

20 Jun 2007 19:42:05 GMT

Message-ID:

<4679830d$0$9182$88260bb3@news.teranews.com>

On Wed, 20 Jun 2007 19:37:49 +0000, Obnoxious User wrote:

On Wed, 20 Jun 2007 21:41:13 +0200, Markus Pitha wrote:

Hello,

I'm using a template to simulate a LinkedList from Java.It works without
problems, but when I want to use strings in main.cpp instead of char*, I
get the following error message:

$ ./Main
terminate called after throwing an instance of 'std::logic_error'
what(): basic_string::_S_construct NULL not valid

I tried to import <string> both in main.cpp and listT.h, but the
errormsg was the same.

The classes look like this:

[snip]

template <class T>
T ListT<T>::get(int i) {
TKnoten *iterator = new TKnoten();
T daten = 0;

!---->>^^^^^^^^^^^

T daten = "";

Or better yet, so it works with any type.

T daten;

     iterator = kopf;
     while (iterator->next != 0) {
          if (iterator->index == i) {
             daten = iterator->daten;
          }
          iterator = iterator->next;
     }
     delete iterator;
     return daten;
}

What's wrong with string as type? I'm using Linux with gcc (g++),

--
Obnoxious User