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by Arnold D. Robbins
Move to gawk-3.1.6. |
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# Date: Fri, 06 Jan 2006 14:02:17 -0800
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# From: Paul Eggert <eggert@CS.UCLA.EDU>
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# Subject: gawk misparses $expr++ if expr ends in ++
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# To: bug-gawk@gnu.org
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# Message-id: <87irsxypzq.fsf@penguin.cs.ucla.edu>
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#
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# Here's an example of the problem:
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#
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# $ gawk 'BEGIN{a=3}{print $$a++++}'
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# gawk: {print $$a++++}
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# gawk: ^ syntax error
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#
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# But it's not a syntax error, as the expression conforms to the POSIX
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# spec: it should be treated like '$($a++)++'.
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#
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# Mawk, Solaris awk (old awk), and Solaris nawk all accept the
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# expression. For example:
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#
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# $ echo '3 4 5 6 7 8 9' | nawk 'BEGIN{a=3}{print $$a++++}'
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# 7
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#
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# This is with gawk 3.1.5 on Solaris 8 (sparc).
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#
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#
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# #####################################################################################
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# This Mail Was Scanned by 012.net AntiVirus Service1- Powered by TrendMicro Interscan
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#
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BEGIN { a = 3 } |
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{
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print "in:", $0 |
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print "a =", a |
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print $$a++++ |
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print "out:", $0 |
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}
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