Function binding_get_virtual

src/cypher/cypher.c:2870–2902

/* ── Binding virtual variables (for WITH clause) ──────────────── */

static const char *binding_get_virtual(binding_t *b, const char *var, const char *prop) {
    if (!var) {
        return "";
    }
    /* Check virtual vars first (from WITH projection) */
    char full[CBM_SZ_256];
    if (prop) {
        snprintf(full, sizeof(full), "%s.%s", var, prop);
    } else {
        snprintf(full, sizeof(full), "%s", var);
    }
    for (int i = 0; i < b->var_count; i++) {
        if (strcmp(b->var_names[i], full) == 0) {
            return b->var_nodes[i].name ? b->var_nodes[i].name : "";
        }
    }
    /* Fall through to normal lookup */
    cbm_edge_t *e = binding_get_edge(b, var);
    if (e) {
        /* Bare `RETURN r` on an edge: surface the full properties JSON
         * (or "{}" if none) so callers can inspect timestamps, weights,
         * etc. without naming each property. */
        return prop ? edge_prop(e, prop) : (e->properties_json ? e->properties_json : "{}");
    }
    cbm_node_t *n = binding_get(b, var);
    if (n) {
        if (prop) {
            return node_prop(n, prop, b->store);
        }
        return n->name ? n->name : "";
    }
    return "";
}

/* ── String function application ──────────────────────────────── */