Function parse

js/SCAST.js:222–604

(input)

    }
    
    function parse(input) {
        return parse_toplevel();
        function is_punc(ch) {
            var tok = input.peek();
            return tok && tok.type == "punc" && (!ch || tok.value == ch) && tok;
        }
        function is_sp(ch) {
            var tok = input.peek();
            return tok && tok.type == "sp" && (!ch || tok.value == ch) && tok;
        }
        function is_kw(kw) {
            var tok = input.peek();
            return tok && tok.type == "kw" && (!kw || tok.value == kw) && tok;
        }
        function is_op(op) {
            var tok = input.peek();
            return tok && tok.type == "op" && (!op || tok.value == op) && tok;
        }
        function is_id() {
            var tok = input.peek();
            return tok.type=='id';
        }
        function is_num(){
            var tok = input.peek();
            return tok.type=='num';
        }
        function is_str(){
            var tok = input.peek();
            return tok.type=='str';
        }
        
        function skip_punc(ch) {
            if (is_punc(ch)) input.next();
            else input.croak("Expecting punctuation: \"" + ch + "\"");
        }
        function skip_split(ch) {
            if (is_sp(ch)) input.next();
            else input.croak("Expecting punctuation: \"" + ch + "\"");
        }
        function unexpected() {
            input.croak("Unexpected token: " + JSON.stringify(input.peek()));
        }
        function parse_next() {
            var n = input.next();
            return n;
        }
        function parse_toplevel() {
            var prog = [];
            while (!input.eof()) {
                prog.push(parse_statement());
            }
            return { type: "top", 'body': prog };
        }
        function parse_block() {
            var poi={line:input.peek().poi.line,start:input.peek().poi.start}
            var body = [];
            skip_punc("{");
            while (!is_punc("}")) {