Draft of Function.prototype.bind.
david.hopwood at industrial-designers.co.uk
Mon Nov 3 18:50:05 PST 2008
Mike Shaver wrote:
> On Mon, Nov 3, 2008 at 12:32 PM, David-Sarah Hopwood
> <david.hopwood at industrial-designers.co.uk> wrote:
>> An object that was previously a callable nonfunction in some browser,
>> can always be compatibly changed into a real function instead.
> Does that mean that RegExp.prototype has as its prototype
> Function.prototype, for those implementations which have callable
It's not clear to me that it is conformant to ES3 for RegExp objects
to be callable. The behaviour of internal methods for native objects
is fully defined by the spec; it's only host objects for which an
implementation has latitude to define additional internal methods:
# The following table summarises the internal properties used by this
# specification. The description indicates their behaviour for native
# ECMAScript objects. Host objects may implement these internal methods
# with any implementation-dependent behaviour, or it may be that a host
# object implements only some internal methods and not others.
# [[Call]] |
# a list of argument values provided by the caller |
# Executes code associated with the object. Invoked via a function
# call expression. Objects that implement this internal method are
# called /functions/.
That is, native objects that implement [[Call]] must be functions.
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