FWEB commands

• FWEB commands are flagged by an @ symbol in the WEB input file.
• Most TEX and L^ATEX commands can be used in the WEB input file too, although with some caution: don't try stretching things too far. Usually there is a way to accomplish just about anything you wish, although sometimes with a little bit of effort.
• These FWEB commands specify the language for the following FWEB sections:

  @c

  C

  @c++

  C++

  @n

  Fortran-77

  @n9

  Fortran-90

  @r

  Ratfor-77

  @r9

  Ratfor-90

  @x

  TEX

  @v

  verbatim

• The @n (or similar) command may be followed by options, as in @n9[-n/].
• Tricky problems may arise if you try to be too clever, e.g., // is a string concatentation operator in Fortran. If you use the [-n/] option for C++ style comments in your WEB file, you may find it impossible to concatenate strings - and you may not even notice it: all concatenation operations will quietly vanish from the generated Fortran code.