# Design

> UForm for C

Every verb that takes options, outputs or callbacks takes one structure named after it, as `uform_text_encode` takes a `uform_text_encode_t`.
Fields open in the same order everywhere: the handle, `executor`, `outcome` and `completion`, then inputs, then outputs and the `arena` they land in, then knobs, and last `progress` and `stats`.
Structures carry no size or version field, so initialize them by designator, which zeroes every field left out, and expect the major version to change whenever one grows.
Name lookups and the `_free` family stay positional, and a `_free` of `NULL` is safe.