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<p>Hi Jaromir,</p>
<p><br>
</p>
<p>great questions, looking forward to a comprehensive answer, too. :-)</p>
<p><br>
</p>
<p>Ad 1: I suppose these instances were created prior to the introduction of FullBlockClosure and the SistaV1 bytecode set. It's funny to see they're still alive and appear to work.</p>
<p><br>
</p>
<p>Best,</p>
<p>Christoph</p>
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<div id="divRplyFwdMsg" dir="ltr"><font face="Calibri, sans-serif" style="font-size:11pt" color="#000000"><b>Von:</b> Squeak-dev <squeak-dev-bounces@lists.squeakfoundation.org> im Auftrag von Jaromir Matas <mail@jaromir.net><br>
<b>Gesendet:</b> Samstag, 11. Februar 2023 14:08:52<br>
<b>An:</b> Squeak Dev<br>
<b>Betreff:</b> [squeak-dev] Questions about FullBlock closures</font>
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<p class="MsoNormal">Hi,</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Two questions:</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">1) When I do:</p>
<p class="MsoNormal">BlockClosure allInstances size "---> 66"</p>
<p class="MsoNormal">I always get 66 instances of BlockClosure, all of them probably related to the UI (as far as I can tell).
</p>
<p class="MsoNormal">Q: Why do we have those closures as instances of BlockClosure and not FullBlockClosure? (just trying to understand)</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">2) When I do:</p>
<p class="MsoNormal">(FullBlockClosure allInstances select: [:each | each outerContext isNil]) size "---> 0"</p>
<p class="MsoNormal">I always get zero; this means there are no closures without the outer context set. However, the class comment says:</p>
<p class="MsoNormal">FullBlockClosure: [...] outerContext can be either a Context or nil.</p>
<p class="MsoNormal">Q: When would it make sense to use a FullBlockClosure with nilled outer context? No such situation in the system?</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">I wonder: if we used a FullBlockClosure with outerContext == nil, how would then methods like Context >> home work? They assume 'closureOrNil outerContext' is not nil and would fail, if I understand correctly. Am I missing something/confused??</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Many thanks for any help,</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">best,</p>
<p class="MsoNormal">Jaromir</p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNoSpacing"><span lang="CS">--</span></p>
<p class="MsoNoSpacing"><strong><span style="font-family:"Calibri Light",sans-serif;color:#333333;font-weight:normal">Jaromír Matas</span></strong><span style="font-family:"Calibri Light",sans-serif;color:#555555"><o:p></o:p></span></p>
<p class="MsoNoSpacing"><span style="font-family:"Calibri Light",sans-serif;color:#2E75B6">mail@jaromir.net<o:p></o:p></span></p>
<p class="MsoNormal"><span style="color:#8FAADC"><o:p> </o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
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