Defining the Reference construct.

§1. 

    enum REFERENCE_IST

    void Inter::Reference::define(void) {
        inter_construct *IC = Inter::Defn::create_construct(
            REFERENCE_IST,
            L"reference",
            I"reference", I"references");
        IC->min_level = 1;
        IC->max_level = 100000000;
        IC->usage_permissions = INSIDE_CODE_PACKAGE + CAN_HAVE_CHILDREN;
        METHOD_ADD(IC, CONSTRUCT_READ_MTID, Inter::Reference::read);
        METHOD_ADD(IC, CONSTRUCT_VERIFY_MTID, Inter::Reference::verify);
        METHOD_ADD(IC, CONSTRUCT_WRITE_MTID, Inter::Reference::write);
        METHOD_ADD(IC, VERIFY_INTER_CHILDREN_MTID, Inter::Reference::verify_children);
    }

The function Inter::Reference::define is used in 3/dfn (§3).

§2. 

    define BLOCK_RCE_IFLD 2
    define EXTENT_RCE_IFR 3

    void Inter::Reference::read(inter_construct *IC, inter_bookmark *IBM, inter_line_parse *ilp, inter_error_location *eloc, inter_error_message **E) {
        if (Inter::Annotations::exist(&(ilp->set))) { *E = Inter::Errors::plain(I"__annotations are not allowed", eloc); return; }

        *E = Inter::Defn::vet_level(IBM, REFERENCE_IST, ilp->indent_level, eloc);
        if (*E) return;

        inter_package *routine = Inter::Defn::get_latest_block_package();
        if (routine == NULL) { *E = Inter::Errors::plain(I"'reference' used outside function", eloc); return; }

        *E = Inter::Reference::new(IBM, ilp->indent_level, eloc);
    }

    inter_error_message *Inter::Reference::new(inter_bookmark *IBM, int level, inter_error_location *eloc) {
        inter_tree_node *P = Inter::Node::fill_1(IBM, REFERENCE_IST, 0, eloc, (inter_t) level);
        inter_error_message *E = Inter::Defn::verify_construct(Inter::Bookmarks::package(IBM), P); if (E) return E;
        Inter::Bookmarks::insert(IBM, P);
        return NULL;
    }

    void Inter::Reference::verify(inter_construct *IC, inter_tree_node *P, inter_package *owner, inter_error_message **E) {
        if (P->W.extent != EXTENT_RCE_IFR) { *E = Inter::Node::error(P, I"extent wrong", NULL); return; }
    }

    void Inter::Reference::write(inter_construct *IC, OUTPUT_STREAM, inter_tree_node *P, inter_error_message **E) {
        WRITE("reference");
    }

    void Inter::Reference::verify_children(inter_construct *IC, inter_tree_node *P, inter_error_message **E) {
        LOOP_THROUGH_INTER_CHILDREN(C, P) {
            if ((C->W.data[0] != INV_IST) && (C->W.data[0] != REF_IST) && (C->W.data[0] != SPLAT_IST) && (C->W.data[0] != VAL_IST) && (C->W.data[0] != LABEL_IST)) {
                *E = Inter::Node::error(C, I"only an inv, a ref, a splat, a val, or a label can be below a reference", NULL);
                return;
            }
        }
    }

The function Inter::Reference::read is used in §1.

The function Inter::Reference::new appears nowhere else.

The function Inter::Reference::verify is used in §1.

The function Inter::Reference::write is used in §1.

The function Inter::Reference::verify_children is used in §1.