Strings vs expressions
jkb at mrc-lmb.cam.ac.uk
Mon Feb 19 10:43:08 EST 2001
When is a expression within a string a real expression, and when is it just
part of the string?
Clearly not all $ symbols in strings form expressions. Eg dbiblast.acd
contains a string:
Mostly complex expressions are wrapped in @(), but not always. Eg see
How can I tell expressions from just internal dollars. There doesn't appear to
be any escaping syntax, which means this _must_ be clearly defined to avoid
bugs. My current ruling is if isn't followed by ( then it's not an
expression. Is that valid?
James Bonfield (jkb at mrc-lmb.cam.ac.uk) Tel: 01223 402499 Fax: 01223 213556
Medical Research Council - Laboratory of Molecular Biology,
Hills Road, Cambridge, CB2 2QH, England.
Also see Staden Package WWW site at http://www.mrc-lmb.cam.ac.uk/pubseq/
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