Re: problem passing const_iterator to a function expecting iterator

From:
Victor Bazarov <v.Abazarov@comAcast.net>
Newsgroups:
comp.lang.c++
Date:
Mon, 23 Feb 2009 11:43:56 -0500
Message-ID:
<gnujoc$qf5$1@news.datemas.de>
Zeppe wrote:

magnus.moraberg@gmail.com wrote [23/02/09 16:13]:

Hi,

Im using the class MField<Type> from the H3D API -

http://www.h3dapi.org/uploads/api/H3DAPI_20/docs/H3DAPI/html/classH3D_1_1MField.html

which contains -

typedef vector< Type >::iterator iterator; // and

void insert(iterator pos, const Type &x, int id=0);

I wish to insert a value at the start of an object of this type, as
follows -

segmentField->insert(segmentField->begin(),10);

but the problem is that begin() gives me a const_iterator which I cant
pass to an iterator. What should I do?


if begin returns an iterator rather than a const_iterator,


I am sure Zeppe meant the reverse:

    if begin return a const_iterator rather than an iterator,

 > it's likely

that your segmentField is const, so that you cannot modify it (you
cannot use the "insert" method).

Most likely, either you can have a non-const object to apply that method
to, or you may have a design problem in your code...

Best wishes,

Zeppe


V
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