Message 179887 - Python tracker

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Author	Mark.Shannon
Recipients	Mark.Shannon
Date	2013-01-13.18:42:34
SpamBayes Score	-1.0
Marked as misclassified	Yes
Message-id	<1358102554.86.0.0981281614451.issue16956@psf.upfronthosting.co.za>
In-reply-to

Content
The restriction that line numbers must be monotonically increasing w.r.t bytecode offset in the co_lnotab array prevents a number of beneficial transformations in the bytecode compiler. This patch allows negative line number deltas and uses this capability to generate code for 'while' loops in standard text book fashion, putting the test after the body.

The restriction that line numbers must be monotonically increasing w.r.t bytecode offset in the co_lnotab array prevents a number of beneficial transformations in the bytecode compiler.

This patch allows negative line number deltas and uses this capability to generate code for 'while' loops in standard text book fashion, putting the test *after* the body.

History
Date	User	Action	Args
2013-01-13 18:42:35	Mark.Shannon	set	recipients: + Mark.Shannon
2013-01-13 18:42:34	Mark.Shannon	set	messageid: <1358102554.86.0.0981281614451.issue16956@psf.upfronthosting.co.za>
2013-01-13 18:42:34	Mark.Shannon	link	issue16956 messages
2013-01-13 18:42:34	Mark.Shannon	create