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|ID||Project||Category||View Status||Date Submitted||Last Update|
|0001186||Documentation, Examples, and Web Site||Writing with Inform||public||2014-01-25 17:07||2014-05-07 07:38|
|Target Version||Fixed in Version||6L02|
|Summary||0001186: WI 9.14 seems to contradict /mantis/view.php?id=1081#c2369|
|Description||The attached source, from 0001081:0002369, was given with the comment|
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As horrid as it is, this behaviour is correct. It tests whether the condition "we have examined the grail" is true for the 5th time of asking...
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Going back to WI, I can't seem to find supporting documentation—the closest I got was WI 9.14, which reads
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Given any condition, we can say
if (...condition...) for the second time ...
if (...condition...) twice ...
if (...condition...) 2 times...
if (...condition...) two times...
(all of which are synonymous: the words once, twice, thrice, one, two, three, four, five, six, seven, eight, nine, ten, first, second, third, fourth, fifth, sixth, seventh, eighth, ninth and tenth all mean what they obviously should). The result is true if the condition holds now and has held for only one previous spell in the past. A condition holding for, say, fifteen consecutive turns without a break counts as only one "time" - so what we mean by "twice" here is that it is true now, was previously false for a while, and was previously true for a while before that, but no more.
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Extrapolating, ``for the fifth time'' in the source below ought to result in true only if (1) the condition holds now and (2) it has held for four ``spells'' in the past, each followed by a period of time where the condition was false. But that contradicts both 0001081:0002369 and the behaviour of the example code, in which the condition is true for only one spell. Perhaps WI 9.14 should be clarified?
|Minimal Source Text To Reproduce|
There is a room. Here is a grail. Here is another thing, yet another thing, and a further thing yet. Every turn: repeat with X running through things: if we have examined the grail for the fifth time: say "Hello." Test me with "x grail".
|Tags||No tags attached.|
(Okay, so I've changed my mind about this. The change log reads:)
Problem message added to catch conditions like this:
if we have examined the grail for the fifth time:
which are impossible to satisfy since "we have examined the grail" is
false until it's true, and then stays true forever, so that there cannot
be five distinct periods of time in which it's true. Since this does
not conform to our ordinary English understanding of this condition,
and since the condition cannot be useful, a problem message seems
the best response. (Previously there was a hacky workaround for this,
giving the condition a different meaning, but it had too many demerits
and caused confusion as to what "for the fifth time" meant.)
|2014-01-25 17:07||EmacsUser||New Issue|
|2014-01-25 17:07||EmacsUser||Issue generated from||0001081|
|2014-01-25 17:07||EmacsUser||Relationship added||related to 0001081|
|2014-01-25 17:08||EmacsUser||Project||Core Inform => Documentation, Examples, and Web Site|
|2014-01-25 17:09||EmacsUser||Category||Model world => Writing with Inform|
|2014-01-25 17:09||EmacsUser||Summary||Scene changing rules conditional upon an action having been performed N times get the number wrong => WI 9.14 seems to contradict 0001081:0002369|
|2014-01-25 17:09||EmacsUser||Description Updated||View Revisions|
|2014-04-21 15:10||graham||Note Added: 0002637|
|2014-04-21 15:10||graham||Status||new => resolved|
|2014-04-21 15:10||graham||Resolution||open => fixed|
|2014-04-21 15:10||graham||Assigned To||=> graham|
|2014-05-07 07:37||jmcgrew||Fixed in Version||=> 6L02|
|2014-05-07 07:38||jmcgrew||Status||resolved => closed|
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