[Python-Dev] Re: Decorators: vertical bar syntax (original) (raw)

David Eppstein eppstein at ics.uci.edu
Mon Aug 9 22:49:20 CEST 2004

In article <cf8l1e$9rk$1 at sea.gmane.org>, "Fredrik Lundh" <fredrik at pythonware.com> wrote:

David Eppstein wrote:

> With @, a third party tool has an unambiguous indication of whether a > line is a decorator. With |, it is not possible to recognize decorators > with a regular expression, instead you have to do some context-free > parsing to determine whether some previous line has an unclosed paren > (in which case the | is a binop rather than a decorator). _"_ @decorator #" """ @decorator """ (etc)

I think quoted string recognition in Python is still regular, not context-free. Anyway, the syntax highlighters in editors that I've used don't seem to have a problem with it.

-- David Eppstein Computer Science Dept., Univ. of California, Irvine http://www.ics.uci.edu/~eppstein/

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