Brendan Eich wrote:
On May 14, 2009, at 1:47 PM, Waldemar Horwat wrote:
This whole thing is another nail in the coffin of generators.
Generators are the root of the troublesome longjmp's which don't play
well with others.
Are you talking about generators, or lambdas?
Generators. They cause control flow to jump around between two independent
functions.
THe same problem occurs without lambdas:
function gen(arg) {
try {
yield 1;
yield 2;
} finally {
alert("Finally called up to three times?!");
}
}
That finally will be called either 1, 2, or 3 times depending on what the
caller does, which violates the principle that finally is called exactly once,
no matter how you leave a scope.
Waldemar
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