This one takes white space into consideration:
const parse = (signature, values = []) => { if (!signature) { return values } const next = /^\([^)]+\)|\w+/.exec(signature.trim())[0] const nextArrow = signature.indexOf('->', next.length) const trimAt = nextArrow === -1 ? next.length : nextArrow + 2 const nextSignature = signature.substr(trimAt).trim() return parse(nextSignature, [...values, next]) }
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This one takes white space into consideration: