NAME
       subst - Perform backslash, command, and variable substitu-
       tions

SYNOPSIS
       subst string


DESCRIPTION
       This command performs variable substitutions, command sub-
       stitutions,  and  backslash  substitutions  on  its string
       argument and returns the  fully-substituted  result.   The
       substitutions are performed in exactly the same way as for
       Tcl commands.  As a result, the string argument  is  actu-
       ally  substituted  twice,  once  by  the Tcl parser in the
       usual fashion for Tcl commands, and  again  by  the  subst
       command.

       Note:  when  it performs its substitutions, subst does not
       give any special  treatment  to  double  quotes  or  curly
       braces.  For example, the script

              set a 44
              subst {xyz {$a}}

       returns ``xyz {44}'', not ``xyz {$a}''.


KEYWORDS
       backslash  substitution,  command  substitution,  variable
       substitution
