Dynamically creating quantities

[Chris Maden <crism@xxxxxxx>]

Can a quantity be created from a string?  I'm trying

(string->symbol (string-append "30"
			       "pt"))

in Jade as a column width specification, but it's unacceptable.  A
DSSSL erratum states that it's not clear whether (string->number) will
handle quantities, but in Jade, it definitely doesn't work.

Does anyone have a suggestion on how to create a length-spec
dynamically?

Thanks in advance,
Chris
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