Re: [boost] vc71 - tokenizer not working with static runtime and unicode?

From: Beman Dawes (bdawes_at_[hidden])
Date: 2004-02-22 21:50:34

At 06:12 AM 2/22/2004, Bronek Kozicki wrote:

 >Bronek Kozicki <brok_at_[hidden]> wrote:
 >> I suppose there might be some problem with vc71 static runtime
 >> library, but maybe you have other explanation?
 >
 >OK, I know the reason. Sorry for bothering you. We have unusual
 >manifestation of undefined behaviour here - tokenizer should not be
 >initialized with temporary string. It does not make a copy of its
 >string argument, instead it stores only begin and end iterators. Of
 >course these iterators are no longer valid once temporary string
 >variable is destroyed. Program could crash, but it can do anything else
 >when dereferencing such dangling iterator.

Ouch! That seems an unfortunate design decision. Perhaps two forms of 
constructors could have been provided - one form that takes two iterators 
and doesn't store a copy of the contents, and another form like the current 
constructors which takes a container reference but (unlike the current 
constructor) makes a copy. I wonder if that was discussed at the time? Or 
is there a better way to prevent the problem?

--Beman