• ? : which means that the symbol (or group of
symbols in parenthesis) to the left of the operator is optional (it can appear zero or one
times)
• * : which means that something can be repeated any number of times (and possibly be
skipped altogether)
• + : which means that something can appear one or more times
doru can you add that to the moose web site?
I will add that to the document I'm writing.
On Oct 31, 2011, at 10:28 PM, Stéphane Ducasse wrote:
* = 0, 1 or many
now what means ? and +
+ = 1 or many
? optional ?
what is the standard used to describe the grammar?
Stef
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