	ast: function(text) {
		this.text = text;
		this.tokens = this.lexer.lex(text);

		var value = this.program();

		if (this.tokens.length !== 0) {
			this.throwError("is an unexpected token", this.tokens[0]);
		}

		return value;
	},
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.