NAME

       yap - prolog interpreter and compiler

SYNOPSIS

       yap [options] filename

DESCRIPTION

       yap is a prolog interpreter and compiler.

       In  its basic form, yap starts an interactive Prolog interpreter.  When restoring a saved state, yap will
       allocate the same amount of memory as that in use when the state was saved, unless a different amount  is
       specified  by  flags  in  the  command  line.  By default, yap restores the file startup from the current
       directory or from the yap library.

       See the yap manual for how to use yap for writing Prolog scripts.

OPTIONS

       -?     Print a short error message.

       -s n   Allocate n K bytes for local and global stacks.

       -h n   Allocate n K bytes for heap and auxiliary stacks

       -t n   Allocate n K bytes for the trail stack

       -l yap-file
              Compile the Prolog file yap-file before entering the top-level.

       -L yap-file
              Compile the Prolog file yap-file and then halt. This option is useful for implementing scripts.

       -g goal
              run the goal goal before top-level. The goal is converted from an atom to a Prolog term.

       -z goal
              run the goal goal as top-level. The goal is converted from an atom to a Prolog term.

       -b boot-file
              Boot code is in Prolog file boot-file. The filename must define the predicate '$live'/0.

       -c ip-host port
              Connect standard streams to host ip-host at port port.

       filename
              Restore state saved in the given file.

       --     Separator for arguments to Prolog code. These arguments are visible through the unix/1 built-in.

ENVIRONMENT

       YAPBINDIR
              Yap usually boots from a saved state. The saved state will use the default installation  directory
              to search for the YAP binary unless you define the environment variable YAPBINDIR.

       YAPLIBDIR
              Yap  always  tries to find saved states from the current directory first. If it cannot it will use
              the environment variable YAPLIBDIR, if defined, or search the default library directory.

       YAPSHAREDIR
              Yap will try to find library files from the YAPSHAREDIR/library directory.

SEE ALSO

       The YAP manual is on a debian system available through the info system (command info yap), and as a  html
       document through the debian help system.

AUTHOR

       Yap was written by R. Lopes, L.Damas, V. Santos Costa.

       This  manual  page  was  compiled by Ralf Treinen <treinen@debian.org> from the Yap manual for the Debian
       project (but may be used by others).

COPYRIGHT

       Since this manpage is derived from the yap manual it is subject to the licence of the yap manual:

       Permission is granted to make and distribute verbatim copies of this manual provided the copyright notice
       and this permission notice are preserved on all copies.

       Permission  is  granted  to copy and distribute modified versions of this manual under the conditions for
       verbatim copying, provided that the entire resulting derived work is distributed under  the  terms  of  a
       permission notice identical to this one.

       Permission is granted to copy and distribute translations of this manual into another language, under the
       above conditions for modified versions.

                                                December 23, 2007                                         YAP(1)