Purescript: Parse error thrown for the `**` operator in foreign files.

[angadgill92]

This for example:

"use strict"

function powerOfTwo (power) {
  return 2.0 ** power;
};

exports.powerOfTwo = powerOfTwo

module Power where

foreign import powerOfTwo :: Number -> Number

Throws this error

    The module could not be parsed:


    MulToken {tokenSpan = TokenPn 58 4 15, tokenComment = []}

[Pauan]

PureScript only supports ECMAScript 5 (which was standardized in 2009).

The ** operator was added in ECMAScript 2016, which is quite recent.

You can use Math.pow(2.0, power) instead.

[paf31]

This would need to be addressed in language-javascript, but @Pauan is right that this is expected behavior as we expect ES5 syntax.

[angadgill92]

TIL ** was introduced in ECMAScript 2016. Thanks 🙂!