subst - Perform backslash, command, and variable substitutions
subst ?-nobackslashes? ?-nocommands? ?-novariables? string
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 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 special 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}''.
backslash substitution, command substitution, variable substitution
Copyright © 1994 The Regents of the University of California.
Copyright © 1994-1996 Sun Microsystems, Inc.
Copyright © 1995-1997 Roger E. Critchlow Jr.
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