Correct parsing of ternary operator.

[Daeshik Kim]

In article <9493 at batcomputer.tn.cornell.edu> lijewski at batcomputer.tn.cornell.edu (Mike Lijewski) writes:
>
>	c ? c = a : c = b;
	
	The only way I can guess is follows:

	1. having top-down parsing (LL)	predictive grammar def.
	for fast parsing --> ERROR

		(c)[expr] (?) (c = a)[expr] (:) (c) ... 
						^^^
		HERE, left-to-right scan may predict the last token 'c'
		an expression

	2. having slow bottom-up (LR) right-most grammar
		--> off course, accept this
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