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[11:11:34] <inariksit> I wonder if I should add to my gotchas post the thing about pattern matching tuples where you can leave out some fields
[11:12:07] <inariksit> like are people using it so much that they might run into the problems, or if I talk about it will I just introduce the practice and thus introduce tons of bugs
[11:13:53] <inariksit> basically:
[11:13:56] <inariksit> case <pol,t,p,n> of { <Pos,PPresent2 PrPerf>             => this ; <Pos,PPresent2 PrImperf,PPers3,Sg> => is ; <Pos,PPresent2 PrImperf>           => buggy } ;
[11:13:56] <inariksit> but
[11:13:58] <inariksit> case <pol,t,p,n> of { <Pos,PPresent2 PrImperf,PPers3,Sg> => this ; <Pos,PPresent2 PrPerf>             => is ; <Pos,PPresent2 PrImperf>           => fine } ;
[11:14:15] <inariksit> oops sorry formatting, it was line breaks in my editor :-P
[11:14:48] <inariksit> the point is that in the upper case, even though PrPerf ≠ PerImperf, it's still causing an error, probably because PPresent2 is the same constructor
[11:16:43] <inariksit> actually I found another bug in pattern matching with records the other day
[11:17:54] <inariksit> let me just document it here in case I want to write about it to gf-dev :-P
[11:17:54] <inariksit> UsePN pn = emptyNP ** { s = pn.s; a = NounPer3 pn
[11:17:57] <inariksit> --    a = NounPer3 {g=pn.g ; n=pn.n ; s=pn.s} -- this works } ;
[11:18:02] <inariksit>  
[11:18:14] <inariksit> and the definitions are:
[11:18:15] <inariksit>  
[11:18:28] <inariksit> Agr = NounPer3 {g:Gender ; n:Number} | Pron PerGenNum ;
[11:18:35] <inariksit> PN = {s : Case => Str; g : Gender; n : Number} ;
[11:19:09] <inariksit> anyway, writing   ` a = NounPer3 pn `  causes internal error in GeneratePMCFG
[11:19:30] <inariksit> even though  ` a = NounPer3 {g=pn.g ; n=pn.n ; s=pn.s} `  is exactly the same definition
[11:20:16] <inariksit> and naturally it works just fine with ` a = NounPer3 {g=pn.g ; n=pn.n} ` , just thought to save a couple of characters and thus I tried  `a = NounPer3 pn`
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[20:24:59] <inariksit> hi!
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