Flex Lexer - iostream.h and others

Question

I am trying to use Flex to generate a scanner. The version is 2.5.4. from http://gnuwin32.sourceforge.net/packages/flex.htm website.

I am using the example from the Flex manual.

My enviroment is Windows 7 running VS2010.

So I execute the command flex -c++ scanner.l to generate lex.yy.cc.

I create a simple console app. and include the dir "C:\GnuWin32\include", containing flexlexer.h and unistd.h.

I also add the file lex.yy.cc to VS2010 and compile and get the error:

c:\gnuwin32\include\flexlexer.h(47): fatal error C1083: Cannot open include file: 'iostream.h': No such file or directory

So I change iostream.h for iostream. But now I am getting:

c:\gnuwin32\include\flexlexer.h(72): error C2061: syntax error : identifier 'ostream'

The problem is that is defined in namespace std. I imagined I could compile flex to C++ without this kind of problem.

Am I doing something wrong? using wrong versions?

Thanks!

Answer 1

I download and use Win flex-bison and everything is ok now.

http://sourceforge.net/projects/winflexbison/