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Guile actions are invoked from the
RULE section using the
guile-process command. Its syntax is:
The name of the Guile function to be invoked.
Additional arguments. These are passed to the function as its third argument (rest).
To pass keyword arguments to the function, use the usual Scheme notation: ‘#:key’.
As an example, let’s consider the invocation of the
function, defined in the previous subsection:
guile-process fix-subject <<-EOT ---------- Kind regards, Antonius Block EOT
In this example, the additional argument (a string of three lines) is passed to the function, which will add it to the message of the body.
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