tangle (1)

NAME

       tangle - translate WEB to Pascal

SYNOPSIS

       tangle webfile[.web] [ changefile[.ch] ]

DESCRIPTION

       This  manual page is not meant to be exhaustive.  The complete documen-
       tation for this version of TeX can be found in the info file or  manual
       Web2C: A TeX implementation.

       The tangle program converts a Web source document into a Pascal program
       that may be compiled in the usual way with the on-line Pascal  compiler
       (e.g.,  pc(1)).   The  output file is all in lower case and packed into
       lines of 72 characters or less, with the only concession to readability
       being the termination of lines at semicolons when this can be done con-
       veniently.

       The Web language allows you to prepare a single document containing all
       the information that is needed both to produce a compilable Pascal pro-
       gram and to produce a well-formatted document describing the program in
       as  much  detail  as  the  writer  may desire.  The user of Web must be
       familiar with both TeX and Pascal.  Web also provides a relatively sim-
       ple, although adequate, macro facility that permits a Pascal program to
       be written in small easily-understood modules.

       The command line should have either one or two names on it.  The  first
       is  taken as the Web file (and .web is added if there is no extension).
       If there is another name, it is a change file  (and  .ch  is  added  if
       there  is  no  extension).   The change file overrides parts of the Web
       file, as described in the Web system documentation.

       The output files are a Pascal file and a string pool file, whose  names
       are  formed  by adding .p and .pool respectively to the root of the Web
       file name.

SEE ALSO

       pc(1), pxp(1) (for formatting tangle output when debugging), tex(1).

       Donald E. Knuth, The Web System of Structured Documentation.

       Donald E. Knuth, Literate Programming,  Computer  Journal  27,  97-111,
       1984.

       Wayne  Sewell,  Weaving  a  Program,  Van Nostrand Reinhold, 1989, ISBN
       0-442-31946-0.

       Donald E. Knuth, TeX: The Program (Volume B of Computers  and  Typeset-
       ting), Addison-Wesley, 1986, ISBN 0-201-13437-3.

       Donald E. Knuth, Metafont: The Program (Volume D of Computers and Type-
       setting), Addison-Wesley, 1986, ISBN 0-201-13438-1.

       These last two are by far the largest extant examples of Web  programs.


Web2C 7.3.1                    12 February 1993                      tangle(1)