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<p class="MsoNormal"><span style="color:#1F497D">Thx.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">One trial, that I believe should work, is:<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">open SVG<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">(*con intPair = int*int*)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">fun fst (x: int*int) = x.1<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#1F497D">fun snd (x: int*int) = x.2<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">fun circleDraw(x: int*int): xsvg =<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <xml><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <circle cx={show ((fst x)-60)} cy={show ((snd x)-100)} r="10" stroke="red" fill="blue"/><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </xml><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> fun proc (x: int*int): transaction page =<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> x <- source x;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> return<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <xml><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <body onmousemove={fn ev => set x (ev.ScreenX,ev.SceenY)}><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <div style="width:800; heigth:800"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <dyn signal={x<-signal x;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> return<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <xml><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <svg width="800" height="800"><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> {circleDraw x}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </svg><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </xml>}/><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </div><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </body><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </xml><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">fun main(): transaction page =<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> let<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> val a = (0,0)<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> in<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> xml <- proc a;<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> return<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <xml><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <head><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> Banzai<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </head><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> {xml}<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> </xml><o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> end<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="color:#1F497D;background:yellow;mso-highlight:yellow">But I get:</span></b><b><span lang="EN-US" style="color:#1F497D"><o:p></o:p></span></b></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Can't unify record constructors<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Have: <o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">[ScreenX = int, ScreenY = int, ClientX = int, ClientY = int,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> CtrlKey = bool, ShiftKey = bool, AltKey = bool, MetaKey = bool,
<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"> Button = mouseButton]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D">Need: <UNIF:U140::{Type}> ++ [ScreenX = int, SceenY = int]<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><b><span lang="EN-US" style="color:#1F497D;background:yellow;mso-highlight:yellow">On</span></b><span lang="EN-US" style="color:#1F497D"> “ <body onmousemove={fn ev => set x (ev.ScreenX,ev.SceenY)}>”<o:p></o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span lang="EN-US" style="color:#1F497D"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-left:65.2pt"><b><span lang="EN-US" style="color:windowtext;mso-fareast-language:SV">From:</span></b><span lang="EN-US" style="color:windowtext;mso-fareast-language:SV"> Ur [mailto:ur-bounces@impredicative.com]
<b>On Behalf Of </b>Adam Chlipala<br>
<b>Sent:</b> den 16 april 2018 13:29<br>
<b>To:</b> ur@impredicative.com<br>
<b>Subject:</b> Re: [Ur] UR/Web SVG (ffi) question<o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:65.2pt"><o:p> </o:p></p>
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<p class="MsoNormal" style="margin-left:65.2pt">I have not read all of your code, but I did spot the problem behind the first compiler error message, which I think all web developers would agree is problematic. (I.e., it isn't just a question of a fussy Ur/Web
type system.)<br>
<br>
On 04/16/2018 04:58 AM, Jonas Mellin wrote:<span style="font-size:12.0pt;mso-fareast-language:SV"><o:p></o:p></span></p>
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<p class="MsoNormal" style="margin-left:65.2pt;background:white"><b><i><span lang="EN-US" style="color:#1F497D">[Jonas Mellin]
</span></i></b><span lang="EN-US" style="color:#1F497D"><<< collapsed answer >>></span><o:p></o:p></p>
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<p class="MsoNormal" style="margin-left:65.2pt"><span style="font-size:12.0pt;font-family:"Times New Roman",serif;mso-fareast-language:SV"><br>
Notice that your [proc] code includes a <body> tag, but then you nest it within another <body> tag!<o:p></o:p></span></p>
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