# `CEL.Field`
[🔗](https://github.com/hansihe/pb_ex/blob/v0.2.0/cel_ex/lib/cel/field.ex#L1)

A field of a message type, as a `CEL.TypeProvider` describes it.

  * `:name` — the field's name, as expressions select it.
  * `:type` — its `t:CEL.Type.t/0`: a list type for a repeated field, a
    map type for a map field, and the CEL type of a well-known type, such
    as `:timestamp` or `{:wrapper, :int}`, for a field holding one.
  * `:kind` — `:singular`, `:repeated` or `:map`.
  * `:oneof` — the name of the oneof the field is in, or `nil`.
  * `:ref` — the provider's own handle on the field. CEL keeps it in
    checked expressions and hands it back when reading the field, and
    never looks inside.

The checker looks a field up once, with `c:CEL.TypeProvider.find_field/3`,
and evaluation reads it through the same struct.

# `kind`

```elixir
@type kind() :: :singular | :repeated | :map
```

# `t`

```elixir
@type t() :: %CEL.Field{
  kind: kind(),
  name: String.t(),
  oneof: CEL.TypeProvider.name() | nil,
  ref: term(),
  type: CEL.Type.t()
}
```

---

*Consult [api-reference.md](api-reference.md) for complete listing*