From: Hans Aberg (email@example.com)
Date: Sat Aug 08 2009 - 16:18:29 CDT
On 8 Aug 2009, at 01:54, Joachim Durchholz wrote:
> * The mention of ]...[ got me thinking. I was aiming for making all
> kinds of parentheses into the equivalent of (...), but it's
> important to
> allow people to define operators like |...| (say, if they are
> a set of operators that should mimick mathematical conventions as
> closely as possible).
Another example: physics "bra-ket" notation <x| and |y>, for vectors
in Hilbert spaces.
> In other words, different pairs of parentheses
> would have different, programmer-defined semantics, which means the
> programmer names the parenthese pair anyway and I don't need to rely
> Unicode to classify parentheses.
The grammar of the set matching pairs is not context-free.
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