require.js
function next(exp) {
		exp.lastIndex = index;
		const match = exp.exec(code)[0];
		index = exp.lastIndex;
		return match;
	}
function next(exp) {
		exp.lastIndex = index;
		const match = exp.exec(code)[0];
		index = exp.lastIndex;
		return match;
	}
function next ( exp ) { exp . lastIndex = index ; const match = exp . exec ( code ) [ 0 ] ; index = exp . lastIndex ; return match ; }
the next position of interest
the next position of interest