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adding '::' as shorthand for '.prototype.'

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Jeremy Ashkenas
2010-01-10 16:16:59 -05:00
parent 902febb43a
commit ad18378f7e
10 changed files with 59 additions and 36 deletions
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@@ -973,23 +973,23 @@ globals = ((function() {
it's awkward to call <b>super</b> (the prototype object's
implementation of the current function), and it's awkward to correctly
set the prototype chain. CoffeeScript provides <tt>extends</tt>
to help with prototype setup, and converts
<tt>super()</tt> calls into calls against the immediate ancestor's
method of the same name.
to help with prototype setup, <tt>::</tt> for quick access to an
object's prototype, and converts <tt>super()</tt> calls into calls against
the immediate ancestor's method of the same name.
</p>
<div class='code'><pre class="idle"><span class="FunctionName">Animal</span><span class="Keyword">:</span> <span class="Storage">=&gt;</span>
<span class="FunctionName">Animal.prototype.move</span><span class="Keyword">:</span> <span class="FunctionArgument">meters</span> <span class="Storage">=&gt;</span>
Animal<span class="Keyword">:</span><span class="Keyword">:</span><span class="FunctionName">move</span><span class="Keyword">:</span> <span class="FunctionArgument">meters</span> <span class="Storage">=&gt;</span>
alert(<span class="Variable">this</span>.name <span class="Keyword">+</span> <span class="String"><span class="String">&quot;</span> moved <span class="String">&quot;</span></span> <span class="Keyword">+</span> meters <span class="Keyword">+</span> <span class="String"><span class="String">&quot;</span>m.<span class="String">&quot;</span></span>)
<span class="FunctionName">Snake</span><span class="Keyword">:</span> <span class="FunctionArgument">name</span> <span class="Storage">=&gt;</span> <span class="Variable">this</span>.name<span class="Keyword">:</span> name
Snake <span class="Variable">extends</span> Animal
<span class="FunctionName">Snake.prototype.move</span><span class="Keyword">:</span> <span class="Storage">=&gt;</span>
Snake<span class="Keyword">:</span><span class="Keyword">:</span><span class="FunctionName">move</span><span class="Keyword">:</span> <span class="Storage">=&gt;</span>
alert(<span class="String"><span class="String">&quot;</span>Slithering...<span class="String">&quot;</span></span>)
<span class="Variable">super</span>(<span class="Number">5</span>)
<span class="FunctionName">Horse</span><span class="Keyword">:</span> <span class="FunctionArgument">name</span> <span class="Storage">=&gt;</span> <span class="Variable">this</span>.name<span class="Keyword">:</span> name
Horse <span class="Variable">extends</span> Animal
<span class="FunctionName">Horse.prototype.move</span><span class="Keyword">:</span> <span class="Storage">=&gt;</span>
Horse<span class="Keyword">:</span><span class="Keyword">:</span><span class="FunctionName">move</span><span class="Keyword">:</span> <span class="Storage">=&gt;</span>
alert(<span class="String"><span class="String">&quot;</span>Galloping...<span class="String">&quot;</span></span>)
<span class="Variable">super</span>(<span class="Number">45</span>)
@@ -1265,11 +1265,21 @@ world...";
<p>
<b class="header" style="margin-top: 20px;">0.2.2</b>
When performing a comprehension over an object, use <tt>ino</tt>, instead
of <tt>in</tt>, which helps us generate smaller, more efficient code at
compile time.
<br />
Added <tt>::</tt> as a shorthand for saying <tt>.prototype.</tt>
<br />
The "splat" symbol has been changed from a prefix asterisk <tt>*</tt>, to
a postfix ellipsis <tt>...</tt>. Added JavaScript's <tt>in</tt> operator,
a postfix ellipsis <tt>...</tt>
<br />
Added JavaScript's <tt>in</tt> operator,
empty <tt>return</tt> statements, and empty <tt>while</tt> loops.
<br />
Constructor functions that start with capital letters now include a
safety check to make sure that the new instance of the object is returned.
<br />
The <tt>extends</tt> keyword now functions identically to <tt>goog.inherits</tt>
in Google's Closure Library.
</p>