Re: [Flex-help] help needed in the transition from flex 2.59 to 2.6

[Will E. <wes...@gm...>]

THe version numbers you are siting are a bit muddled. What does "flex --version" report in both cases?

On Friday,  7 October 2016,  8:45 am +0200, Rollastre Prostit <rol...@gm...> wrote:

> Hello list.
> 
> I looks like there are some changes in the code generated by flex 2.59 
> and 2.6 (in C++) that break my build.
> 
> in 2.59 the code in question in the XXXX.lexer.cpp is this:
> 
> if(!yyin)
> 
> /*%if-c-only*/
> 
> /*%endif*/
> 
> /*%if-c++-only*/
> 
> yyin=&std::cin;
> 
> /*%endif*/
> 
> if(!yyout)
> 
> /*%if-c-only*/
> 
> /*%endif*/
> 
> /*%if-c++-only*/
> 
> yyout=&std::cout;
> 
> /*%endif*/
> 
> 
> and in 2.6 is like this:
> if(!yyin)
> 
> /*%if-c-only*/
> 
> /*%endif*/
> 
> /*%if-c++-only*/
> 
> yyin.rdbuf(std::cin.rdbuf());
> 
> /*%endif*/
> 
> if(!yyout)
> 
> /*%if-c-only*/
> 
> /*%endif*/
> 
> /*%if-c++-only*/
> 
> yyout.rdbuf(std::cout.rdbuf());
> 
> /*%endif*/
> 
> 
> 
> It turns out that the 2.59 version works fine but the 2.6 doesn't 
> compile because yyin and yyout are pointers. I have searched for a 
> solution for my problem in the list but I couldn't find anything. I also 
> googled and found this
> 
> http://stackoverflow.com/questions/34438023/openfoam-flex-yyin-rdbufstdcin-rdbuf-error
> 
> http://htaccess9simo.blogspot.com.es/2015/12/openfoam-flex-yyinrdbufstdcinrdbuf-error.html
> 
> Which basically workaround the problem by downgrading to 2.59 in the 
> /usr/bin. I already tested this and worked for me too. But I would 
> expect there is a better solution which doesn't require that my build 
> system ships a specific version of flex. Does somebody know what am I 
> doing (or not doing) that causes this problem?
> 
> Thank you and sorry if the question is already posted, I just couldn't 
> find it!
> 
> 
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-- 
Will Estes
Flex Project Maintainer
wes...@gm...
https://github.com/westes/flex