	expect: function(e1, e2, e3, e4) {
		var token = this.peek(e1, e2, e3, e4);
		if (token) {
			this.tokens.shift();
			return token;
		}
		return false;
	},
The software constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.