Examples with Yield org.mozilla.javascript.ast.Yield used on opensource projects

Example 1 with Yield

use of org.mozilla.javascript.ast.Yield in project HL4A by HL4A.

the class Parser method returnOrYield.

private AstNode returnOrYield(int tt, boolean exprContext) throws IOException {
    if (!insideFunction()) {
        reportError(tt == Token.RETURN ? "msg.bad.return" : "msg.bad.yield");
    }
    consumeToken();
    int lineno = ts.lineno, pos = ts.tokenBeg, end = ts.tokenEnd;
    AstNode e = null;
    // This is ugly, but we don't want to require a semicolon.
    switch(peekTokenOrEOL()) {
        case Token.SEMI:
        case Token.RC:
        case Token.RB:
        case Token.RP:
        case Token.EOF:
        case Token.EOL:
        case Token.ERROR:
        case Token.YIELD:
            break;
        default:
            e = expr();
            end = getNodeEnd(e);
    }
    int before = endFlags;
    AstNode ret;
    if (tt == Token.RETURN) {
        endFlags |= e == null ? Node.END_RETURNS : Node.END_RETURNS_VALUE;
        ret = new ReturnStatement(pos, end - pos, e);
        // see if we need a strict mode warning
        if (nowAllSet(before, endFlags, Node.END_RETURNS | Node.END_RETURNS_VALUE))
            addStrictWarning("msg.return.inconsistent", "", pos, end - pos);
    } else {
        if (!insideFunction())
            reportError("msg.bad.yield");
        endFlags |= Node.END_YIELDS;
        ret = new Yield(pos, end - pos, e);
        setRequiresActivation();
        setIsGenerator();
        if (!exprContext) {
            ret = new ExpressionStatement(ret);
        }
    }
    // see if we are mixing yields and value returns.
    if (insideFunction() && nowAllSet(before, endFlags, Node.END_YIELDS | Node.END_RETURNS_VALUE)) {
        Name name = ((FunctionNode) currentScriptOrFn).getFunctionName();
        if (name == null || name.length() == 0)
            addError("msg.anon.generator.returns", "");
        else
            addError("msg.generator.returns", name.getIdentifier());
    }
    ret.setLineno(lineno);
    return ret;
}