Updates:
Cc: [email protected] [email protected] [email protected]
Comment #3 on issue 4212 by [email protected]: yield allowed as parameter
name in arrow function in generator context
https://code.google.com/p/v8/issues/detail?id=4212
[-arv, as he has grazed on to greener pastures :) +adamk, conradw because
hey, otherwise it's lonely]
I can initially plan on fixing this by adding a new flag to the
classifier. We rename the ArrowFormalParameters production in the
classifier to ArrowFormalParameterList, to avoid too much confusion with
ArrowFormalParameter, the new production. Anywhere the parser would record
a BindingPatternError it also signals an ArrowFormalParameter error, with
the exception of these cases noted in test-parsing.cc:
({a} = {}) => {}
([x] = []) => {}
We additionally make any occurence of the yield token while in a generator
record an ArrowFormalParameter error, to fix this bug.
There are about 35 places or so in preparser.h where we record binding
pattern errors. This proposed approach will add ArrowFormalParameter
errors to each of those sites, sadly. WDYT Andreas?
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