union type syntax
waldemar at google.com
Fri Mar 21 15:46:14 PDT 2008
There is no solid technical reason for requiring parentheses here. They're here because of people's preferences. I don't find them particularly useful here.
Peter Hall wrote:
> Now that union type uses "|" instead of "," for the delimiter, could
> the parentheses be made optional? It seems like parentheses are used
> elsewhere only for grouping and function calls/definitions.
> UnionType ::= Type ( "|" UnionType )?
> which should be easily distinguishable from a bitwise OR expression.
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