Unexpected token ":"

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João Fernandes

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May 27, 2015, 11:25:52 AM5/27/15
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Hi, I'm trying in arrow function to define a datatype like this

someArray.forEach(item:SomeDataType => .....) but traceur always throws an error Unexpected token ":".

As soon I comment the dataType, it works perfectly.

I'm using 0.0.79 with this arguments:


experimental: true,
modules: 'amd',
blockBinding:true,
types:true,
annotations:true,
memberVariables:true,
asyncFunctions:true

Erik Arvidsson

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May 27, 2015, 12:23:55 PM5/27/15
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Type annotations are not supported in arrow functions.

I just tried it in TypeScript, and your code does not work there
either. In TS you need to use parens if you want type annotaions in
the arrow formals.

It is also not clear how this can be speced? Lets bring it up on the
TS github repo.
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