Sorry to over-reply. This *does* work in SpiderMonkey:
js> function f(a = g) { function g(){}; yield a; }
js> var it = f()
js> it.next()
function g(){}
/be
Brendan Eich wrote:
SpiderMonkey (Firefox 15 and newer has default parameters):
js> function f(a = g) { function g(){}; return a; }
js> f()
function g(){}
So function g is hoisted and a defaults to it, as expected.
The trivial generator variant, i.e., what you get by putting a * after
function and before f, above:
js> function* f(a = g) { function g() {}; return a; }
js> var it = f();
js> it.next();
function g(){}
(note well, not yet implemented in SpiderMonkey) should behave the
same, or crazypants.
/be
Brendan Eich wrote:
Brendan Eich wrote:
However, the semantics of parameter default value initialization
can result in exceptions and more closely links argument
instantiations with the actual activation of the generator
function. You can't really build the parameter bindings without
performing declaration instantiation for the function.
Agreed, that's absolutely true (no "really" about it -- or rather,
"for real" ;-).
And (I should have written), if your point was that we must bind all
var and top level function/let/const declarations before the implicit
yield; inserted "after the opening brace", I don't see a problem.
Hoisted functions with usable initial values, hoisted vars with
undefined initial values, and temporal dead zones for the let and
const declarations that are at top (generator body) level. Right?
/be
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
_______________________________________________
es-discuss mailing list
[email protected]
https://mail.mozilla.org/listinfo/es-discuss
