/// body        : Body of this foreach loop.
    ///
    #define StrForeachReversePtrIdx(str, chrptr, idx, body) VecForeachPtrReverseIdx((str), (chrptr), idx, {body})
    
    ///

    ///           invalid index access) will result in a fatal log message and program termination.
    ///
    #define VecForeachPtrReverse(v, var, body) VecForeachPtrReverseIdx((v), (var), (____iter___), {body})
    
    ///

    // Test VecForeachPtrReverseIdx macro
    bool test_vec_foreach_ptr_reverse_idx(void) {
    printf("Testing VecForeachPtrReverseIdx\n");
    
    // Create a vector of integers

    
    // Use VecForeachPtrReverseIdx to set each value to its index + 100
    VecForeachPtrReverseIdx(&vec, item_ptr, idx, { *item_ptr = idx + 100; });
    
    // Check that the values are set correctly

    // Deadend test: Make idx go out of bounds in VecForeachPtrReverseIdx by modifying vector during iteration
    bool test_vec_foreach_ptr_reverse_idx_out_of_bounds_access(void) {
    printf("Testing VecForeachPtrReverseIdx where idx goes out of bounds (should crash)\n");
    
    typedef Vec(int) IntVec;

    
    // VecForeachPtrReverseIdx has explicit bounds checking: if ((idx) >= (v)->length) LOG_FATAL(...)
    VecForeachPtrReverseIdx(&vec, val_ptr, idx, {
    printf("Accessing idx %zu (vec.length=%zu): %d\n", idx, vec.length, *val_ptr);