Method rot_map

output/java/1.4.17/Interpreter.java:813–838

Renders expressions of the form or .

(InstanceScope scope, Object attr, List<ST> prototypes)

     */

    protected void rot_map(InstanceScope scope, Object attr, List<ST> prototypes) {
        if ( attr==null ) {
            operands[++sp] = null;
            return;
        }
        attr = convertAnythingIteratableToIterator(scope, attr);
        if ( attr instanceof Iterator) {
            List<ST> mapped = rot_map_iterator(scope, (Iterator)attr, prototypes);
            operands[++sp] = mapped;
        }
        else { // if only single value, just apply first template to sole value
            ST proto = prototypes.get(0);
            ST st = group.createStringTemplateInternally(proto);
            if ( st !=null ) {
                setFirstArgument(scope, st, attr);
                if ( st.impl.isAnonSubtemplate) {
                    st.rawSetAttribute("i0", 0);
                    st.rawSetAttribute("i", 1);
                }
                operands[++sp] = st;
            }
            else {
                operands[++sp] = null;
            }
        }
    }

    protected List<ST> rot_map_iterator(InstanceScope scope, Iterator<?> attr, List<ST> prototypes) {
        List<ST> mapped = new ArrayList<ST>();