Comment #2 on issue 686 by [email protected]: "With" and function scope
http://code.google.com/p/v8/issues/detail?id=686
[email protected], ECMA-262 Editions 3 and 5 do not specify function
declaration as
a substatement. It is an extension, so Chapter 16 applies and
implementations vary,
with IE and (following it) Opera and WebKit engines hoisting the function
to variable
object scope, and Mozilla engines conditionally binding the name to a
complete closure.
In the forthcoming "Harmony" edition(s) of the ECMA-262 standard, function
in a
braced block (braces are required; function declaration as unbraced
sub-statement
consequent of "if" will be illegal) will bind a block-scoped,
block-hoisted/initialized lexical variable named by the function. But in
that case
the function in Fedor's testcase will entrain its scope chain, including
the object
environment record induced by 'with'.
So SpiderMonkey's behavior is future-proof. But probably you'll want to
wait for the
new edition of the standard.
/be
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