When programmers see a type union expression for the first time, and
are going to intuitively understand | to be an operator, which has a
new meaning when applied to types. Programmers routinely use parens
around complex expressions that involve multiple operators, for
readability and to ensure
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.
Waldemar
Peter Hall wrote:
Now that union type uses | instead of , for the delimiter, could
the parentheses be made optional? It
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
The parens are required. Long discussion here:
http://bugs.ecmascript.org/ticket/308
--lars
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Peter Hall
Sent: 18. mars 2008 09:58
To: es4-discuss@mozilla.org es4-discuss
Subject: union type syntax
