On Apr 22, 2011, at 3:34 PM, Claus Reinke wrote:
>
> Perhaps you should have used 'catch' instead of 'with' for
> your example - the combination of
> - implementations allowing FunctionDeclaration as statement
> - implementations differ in how such FunctionDeclarations are hoisted
> - ES/next limiting FunctionDeclaration hoisting to blocks
>
> seems to imply that for some implementations, ES/next will
> have different behaviour than ES5+FD-statements,
Yes, that's right, but as stated it might seem to imply that implementations
agree with one another on FD-in-block today. Current implementations do not all
agree, so migrating will involve work and testing in any event.
For this reason, ES5 strict implemented in Firefox 4 (SpiderMonkey) makes
FD-in-block an error:
js> function f() { "use strict"; if (C) { function D(){} } }
typein:2: SyntaxError: in strict mode code, functions may be declared only at
top level or immediately within another function:
typein:2: function f() { "use strict"; if (C) { function D(){} } }
typein:2: ...............................................^
/be
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