Unexpected syntax highlighting with default parameters arrow function using function/new

[dpwrussell]

Version: 0.122.0

Works fine:

// Got expected syntax highlighting
const x = (y, z=1) => {};
function x(y, z=1) {}
function x(y, z=getOne()) {}
function x(y, z=new Map()) {}

// Did not get expected syntax highlighting
const x = (y, z=getOne()) => {};
const x = (y, z=new Map()) => {};

I would expect the parameters to be highlighted the same way as they are in the working examples.

Cheers

[winstliu]

Yes, this is a problem with arrow functions that have parentheses in them.
The regex match gets greedy if we try to match the parentheses and it end ups matching the arrow function instead.