/*
read all directives
recognizes a simple form of asi, but always
warns, if it is used
function directives() {
        var i, p, pn;

        for (;;) {
            if (nexttoken.id === "(string)") {
                p = peek(0);
                if (p.id === "(endline)") {
                    i = 1;
                    do {
                        pn = peek(i);
                        i = i + 1;
                    } while (pn.id === "(endline)");

                    if (pn.id !== ";") {
                        if (pn.id !== "(string)" && pn.id !== "(number)" &&
                            pn.id !== "(regexp)" && pn.identifier !== true &&
                            pn.id !== "}") {
                            break;
                        }
                        warning("Missing semicolon.", nexttoken);
                    } else {
                        p = pn;
                    }
                } else if (p.id === "}") {
                    // directive with no other statements, warn about missing semicolon
                    warning("Missing semicolon.", p);
                } else if (p.id !== ";") {
                    break;
                }

                indentation();
                advance();
                if (directive[token.value]) {
                    warning("Unnecessary directive \"{a}\".", token, token.value);
                }

                if (token.value === "use strict") {
                    option.newcap = true;
                    option.undef = true;
                }

                // there's no directive negation, so always set to true
                directive[token.value] = true;

                if (p.id === ";") {
                    advance(";");
                }
                continue;
            }
            break;
        }
    }