* lexical ambiguity glitch
@ 2005-12-12 19:39 Frank Ch. Eigler
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From: Frank Ch. Eigler @ 2005-12-12 19:39 UTC (permalink / raw)
To: systemtap
Hi -
There is a glitch associated with the operators chosen for
pre-processor conditionals: %( %? %: %). The problem is that the
character sequence %( could also occur in an ordinary expression:
5%(x-5)
This ambiguity is just like C++'s ">>" vs "> >" markers for closing
nested templates.
What shall we do about this? Nothing, relying on the generated parse
error message to plop a few spaces in? Rename %( %) to %[ %], which I
believe is immune?
- FChE
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2005-12-12 19:39 lexical ambiguity glitch Frank Ch. Eigler
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