Introduction
In this example, an editing session is called with the name of the file to edit. After the system-call is made, a check for a negative value is made, which presumably means that the editor, "sled", could not be found. Note that because the system-call is made from a condition, it occurs before the output action actually takes place.
Sample
find "\input{" [any except "}"]+ => file-name "}"
output "couldn't start the sled editor%n"
when system-call "sled %x(file-name)" < 0
Generated: April 21, 1999 at 2:01:46 pm
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