RE: Flex and C++

[Matt Carter]

The authors indicated in November that a fix for this would be coming soon.
I got tired of waiting, so I wrote a perl post-processor which seems to do
the job.  Pass your flex-generated C++ source file on the command line to
this perl script.

perl -p -i.bak \
    -e 's/class istream;/#include <iostream>/;' \
    -e 's/(\W)([io]?)stream(\W)/${1}std::${2}stream$3/g;' \
    -e 's/(\W)(cin|cout|cerr)(\W)/${1}std::${2}$3/g;' {put_your_file_here}

Hope it works for you.

-Matt

-----Original Message-----
From: Arjen Baart [mailto:address@hidden
Sent: Tuesday, January 29, 2002 4:59 AM
To: address@hidden
Subject: Flex and C++


Hello Flex,

Is there any maintenance being done on flex ? I noticed the latest version
is 2.5.4a, which is dated 1997.

I run into some problems when creating a C++ scanner (with FlexLexer.h)
while using modern C++ compilers, such as gcc 3.0. Both the header
file and the generated code do not appear to use the namespaces properly.

I'd be happy to fix the problems and send you a patch...

Have fun,

Arjen.

-- 
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Arjen Baart                                    Voice : +31-184-420572
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