<div class="gmail_quote">Wow...I completely missed the Clamato announcement. Fantastic!</div><div class="gmail_quote"><br></div><div class="gmail_quote">On Fri, Sep 4, 2009 at 1:53 PM, Dan Ingalls <span dir="ltr"><<a href="mailto:Dan@squeakland.org">Dan@squeakland.org</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">Hi, Avi -<br>
<div class="im"></div></blockquote><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;"><div class="im">>I don't love the @ syntax, but it has at least two advantages. One is</div>
<div class="im">
>that, by essentially moving instance variable declarations into the<br>
>methods, you can easily add instance variables to classes in other<br>
>packages - Squeak has never had a good way to do this. The other is<br>
>that methods can be parsed and compiled with no context - unlike in<br>
>Smalltalk, can identify instance variables vs. temps vs. globals<br>
>without knowing anything about the class you are compiling the method<br>
>for. OTOH it's kind of ugly.<br>
<br>
</div>With all due respect, I agree ;-).</blockquote><div><br></div><div>What if you used normal temp var declaration syntax, but just added an "@" to indicate instance variables...here is the counter example rewritten in that form..it seems more palatable to me and would have the advantages you mention:</div>
<div><br></div><div><div><Example></div><div><br></div><div>- open</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>| @root |</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>root := '#example' q.</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>self reload.</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>self.</div><div><br></div><div>- reload</div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>| @root |</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>root contents: [:html | self renderOn: html].</div><div><br></div><div><Counter></div><div><br></div><div>+ superclass</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>Example.</div>
<div><br></div><div>- initialize</div><div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>| @counter |</div></div><div><span class="Apple-tab-span" style="white-space:pre"> </span>counter := 0.</div>
<div><br></div><div>- renderOn: html</div><div><span class="Apple-tab-span" style="white-space: pre; "> </span>| @counter |</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>html h3 with: counter.</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>html button</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>with: '+';</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>onClick: [counter := counter + 1. self reload].</div>
<div><span class="Apple-tab-span" style="white-space:pre"> </span>html button</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>with: '-';</div><div><span class="Apple-tab-span" style="white-space:pre"> </span>onClick: [counter := counter - 1. self reload].</div>
<div><br></div></div></div>