I'm with Luke here. We shouldn't abuse a common idiom from other
languages, including upstream ones such as CoffeeScript.
Kris's suggestion of +> changed to deal with the "wrong direction"
criticism (which I find compelling since the [[Prototype]] property is a
reference):
let sub = sup +< {p:1, q:2};
(E4X ambiguity, no worries.)
Comments?
/be
Luke Hoban wrote:
What do you think? Do you like -> better than<| ? Is it ok to not have it
available for some possible future function shorthand?
Both => and -> have strong associations with function shorthands from C#, Scala, C++,
Java 8, Perl, CoffeeScript, ML, Haskell and more. Whether or not JavaScript adopts a ->/=>
shorthand in the future (I still think it should), many developers will think of it as having an
association with functions. Using -> for the proto-of operator effectively also removes the
ability to use => as function shorthand later, due to the syntactic similarity of these two
operators.
Any of these usages (at least for the more widely used languages) are fairly
new so I don't know that they establish that strong of a precedent for ES.
They are new now, but 5 years from now when ES6 has breadth adoption these other
languages will also be 5 years more established. Many programmers will work in at
least one of these other languages as well as in JavaScript. There is also a
relatively strong association of C-style languages using ->/=> as function
shorthand, and JavaScript is still (for better or worse) primarily seen as a C-style
language.
Luke
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