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<b><a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Function.prototype.bind: Bound functions must use the [[Prototype]] of their target function instead of Function.prototype"
href="https://bugs.webkit.org/show_bug.cgi?id=145605#c33">Comment # 33</a>
on <a class="bz_bug_link
bz_status_REOPENED "
title="REOPENED - Function.prototype.bind: Bound functions must use the [[Prototype]] of their target function instead of Function.prototype"
href="https://bugs.webkit.org/show_bug.cgi?id=145605">bug 145605</a>
from <span class="vcard"><a class="email" href="mailto:matthew.jh@outlook.com" title="Matthew Hill <matthew.jh@outlook.com>"> <span class="fn">Matthew Hill</span></a>
</span></b>
<pre>Thanks Geoffrey. The reason for the cast was that it seemed to be necessary (see below).
````
bool hasDefaultPrototype = targetPrototype == globalObject->functionPrototype();
````
doesn't compile.
````
run-javascriptcore-tests
...
error: invalid operands to binary expression ('JSC::JSValue' and 'JSC::FunctionPrototype *')
bool hasDefaultPrototype = targetPrototype == globalObject->functionPrototype();
~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
````
Even
````
asObject(targetPrototype) == globalObject->functionPrototype();
````
doesn't compile with
````
error: comparison of distinct pointer types ('JSC::JSObject *' and 'JSC::FunctionPrototype *')
bool hasDefaultPrototype = asObject(targetPrototype) == globalObject->functionPrototype();
~~~~~~~~~~~~~~~~~~~~~~~~~ ^ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
````
which I don't understand because as you rightly say, FunctionPrototype inherits from JSObject</pre>
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