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

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NAME
       subst - Perform backslash, command, and variable substitutions

SYNOPSIS
       subst ?-nobackslashes? ?-nocommands? ?-novariables? string
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DESCRIPTION
       This  command  performs	variable substitutions, command substitutions,
       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
       actually 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	speci‐
       fied,  then  the	 corresponding	substitutions  are not performed.  For
       example, if -nocommands is specified, no command substitution  is  per‐
       formed:	 open  and  close  brackets are treated as ordinary characters
       with no special interpretation.

       Note: when it performs its substitutions, subst does not give any  spe‐
       cial  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			      subst(n)

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