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subst(n)	      Tcl Built-In Commands		 subst(n)

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

SYNOPSIS
       subst ?-nobackslashes? ?-nocommands? ?-novariables? 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.

       If any of the -nobackslashes, -nocommands, or -novariables
       are  specified,	then  the corresponding substitutions are
       not performed.  For example, if -nocommands is  specified,
       no  command  substitution  is  performed:   open and close
       brackets are treated as ordinary characters with	 no  spe-
       cial interpretation.

       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

Tcl			       7.4				1

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