Brendan Eich wrote:
One solution already used in ECMA-262 to regain LR(1) parsing of the
standard grammar is lookahead restriction. Observe that with
postfix-'?' in patterns, the legal lookahead set is {'=', ':' , ',',
'}', ']'}. So we could simply write a lookahead restriction.
Amended per the formal parameter case that Claude Pache provoked me to
consider:
lookahead not in {'=', ':' , ',', '}', ']', ')'}
after the postfix-'?' optionally following an object or array literal in
the main (cover) grammar.
/be
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