function next(n) {
		if (!n) {
			n = 1;
		}
		for (let i = 0; i < n; i++) {
			char = input[++current];
		}
	}
function next(n) {
		if (!n) {
			n = 1;
		}
		for (let i = 0; i < n; i++) {
			char = input[++current];
		}
	}
function next ( n ) { if ( ! n ) { n = 1 ; } for ( let i = 0 ; i < n ; i ++ ) { char = input [ ++ current ] ; } }
Utility: Move to the next character in the parse
Utility : Move to the next character in the parse