8.5 How a Command Line is Processed
When FunnelWeb reads in a command line (from the
console or a script file), it processes it in the following
- The command line is checked for non-printable
characters. If there are any, they are flagged with a severe
- All dollar string substitution variables in the
command line are replaced by their corresponding string. The
command line is processed from left to right. Substitutions
are performed non recursively.
- At this point, if the line is empty, or consists
entirely of blanks, it is ignored and the interpreter moves
to the next line.
- A severe error is generated if the line at this
stage begins with a blank.
- If the first character of the line is "!",
the line is a comment line and is ignored.
- The run of non-blanks commencing at the start of the
line is compared case-insensitively to each of the legal
command verbs. If the command is illegal, a severe error is
generated, otherwise the command is processed.
Copyright © Ross N. Williams 1992,1999. All rights reserved.