flex-help

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

[Rollastre P. <rol...@gm...>]

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!

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!
> 
> 
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most 
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> -- 
> Flex-help mailing list
> Fle...@li...
> https://lists.sourceforge.net/lists/listinfo/flex-help

-- 
Will Estes
Flex Project Maintainer
wes...@gm...
https://github.com/westes/flex

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

[Rollastre P. <rol...@gm...>]

Thanks for the response.

I am sorry. You are right. I did read the version wrong.  When I say 
2.59 it should have been 2.5.39. But the problem is the same.

JDF@JDF /usr/bin
$ flex -V
flex 2.5.39

which is when it works fine as it assigns a reference to std::cin to the 
pointer yyin  (yyin=&std::cin).

but when using flex 2.6.1

JDF@JDF /usr/bin
$ flex --version
flex 2.6.1

is when it uses the . operator

     yyin.rdbuf(std::cin.rdbuf());

when it should be using the -> operator.

      yyin->rdbuf(std::cin.rdbuf());

In fact, if I edit it manually, the compile error goes away.

I don't know if this is a bug or that I have to specify something in the 
.ll file.


On 07-Oct-16 1:57 PM, Will Estes wrote:
> 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!
>>
>>
>> ------------------------------------------------------------------------------
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
>> -- 
>> Flex-help mailing list
>> Fle...@li...
>> https://lists.sourceforge.net/lists/listinfo/flex-help

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

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

Thanks for the additional detail. I'll look into it.

On Friday,  7 October 2016,  3:31 pm +0200, Rollastre Prostit <rol...@gm...> wrote:

> Thanks for the response.
> 
> I am sorry. You are right. I did read the version wrong.  When I say 
> 2.59 it should have been 2.5.39. But the problem is the same.
> 
> JDF@JDF /usr/bin
> $ flex -V
> flex 2.5.39
> 
> which is when it works fine as it assigns a reference to std::cin to the 
> pointer yyin  (yyin=&std::cin).
> 
> but when using flex 2.6.1
> 
> JDF@JDF /usr/bin
> $ flex --version
> flex 2.6.1
> 
> is when it uses the . operator
> 
>      yyin.rdbuf(std::cin.rdbuf());
> 
> when it should be using the -> operator.
> 
>       yyin->rdbuf(std::cin.rdbuf());
> 
> In fact, if I edit it manually, the compile error goes away.
> 
> I don't know if this is a bug or that I have to specify something in the 
> .ll file.
> 
> 
> On 07-Oct-16 1:57 PM, Will Estes wrote:
> > 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!
> >>
> >>
> >> ------------------------------------------------------------------------------
> >> Check out the vibrant tech community on one of the world's most
> >> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> >> -- 
> >> Flex-help mailing list
> >> Fle...@li...
> >> https://lists.sourceforge.net/lists/listinfo/flex-help
> 
> 
> ------------------------------------------------------------------------------
> Check out the vibrant tech community on one of the world's most 
> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
> -- 
> Flex-help mailing list
> Fle...@li...
> https://lists.sourceforge.net/lists/listinfo/flex-help

-- 
Will Estes
Flex Project Maintainer
wes...@gm...
https://github.com/westes/flex

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

[Rollastre P. <rol...@gm...>]

Hi, it's been a while now and I was wondering if there has been some 
progress/feedback on this issue. (?)

Best and kind regards.


On 07-Oct-16 4:40 PM, Will Estes wrote:
> Thanks for the additional detail. I'll look into it.
>
> On Friday,  7 October 2016,  3:31 pm +0200, Rollastre Prostit <rol...@gm...> wrote:
>
>> Thanks for the response.
>>
>> I am sorry. You are right. I did read the version wrong.  When I say
>> 2.59 it should have been 2.5.39. But the problem is the same.
>>
>> JDF@JDF /usr/bin
>> $ flex -V
>> flex 2.5.39
>>
>> which is when it works fine as it assigns a reference to std::cin to the
>> pointer yyin  (yyin=&std::cin).
>>
>> but when using flex 2.6.1
>>
>> JDF@JDF /usr/bin
>> $ flex --version
>> flex 2.6.1
>>
>> is when it uses the . operator
>>
>>       yyin.rdbuf(std::cin.rdbuf());
>>
>> when it should be using the -> operator.
>>
>>        yyin->rdbuf(std::cin.rdbuf());
>>
>> In fact, if I edit it manually, the compile error goes away.
>>
>> I don't know if this is a bug or that I have to specify something in the
>> .ll file.
>>
>>
>> On 07-Oct-16 1:57 PM, Will Estes wrote:
>>> 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!
>>>>
>>>>
>>>> ------------------------------------------------------------------------------
>>>> Check out the vibrant tech community on one of the world's most
>>>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
>>>> -- 
>>>> Flex-help mailing list
>>>> Fle...@li...
>>>> https://lists.sourceforge.net/lists/listinfo/flex-help
>>
>> ------------------------------------------------------------------------------
>> Check out the vibrant tech community on one of the world's most
>> engaging tech sites, SlashDot.org! http://sdm.link/slashdot
>> -- 
>> Flex-help mailing list
>> Fle...@li...
>> https://lists.sourceforge.net/lists/listinfo/flex-help