# `Feel.Analysis.AtLiterals`
[🔗](https://github.com/FeeJai/BDM/blob/feel-v0.1.0/apps/feel/lib/feel/analysis/at_literals.ex#L1)

The value of an `@"..."` literal, decoded when the expression is prepared.

The text is read as DMN 1.6 writes a date, a time, a date and time or a duration (`Feel.Value.Temporal`). If it is
none of them, and the extensions that are on spell it another way (`c:Feel.Extension.temporal_text/1`, D-81), it is
read as the DMN 1.6 string it stands for, and that is an `:info` with the code `:temporal_spelling`, at the literal. If
nothing reads it, it is an error of the expression (the specification does not say whether it is that or `null`),
and where the text is one of the spellings that are known, the hint says how DMN 1.6 writes it.

    iex> {:ok, value, []} = Feel.Analysis.AtLiterals.value("13:30:00", %{span: {0, 11}}, Feel.Extensions.none())
    iex> value.hour
    13
    iex> {:error, [error]} = Feel.Analysis.AtLiterals.value("13:30", %{span: {0, 8}}, Feel.Extensions.none())
    iex> {error.code, error.hint}
    {:argument_out_of_domain, ~s(DMN 1.6 writes it @"13:30:00")}
    iex> {:ok, value, [info]} = Feel.Analysis.AtLiterals.value("13:30", %{span: {0, 8}}, Feel.Extensions.new([:camunda]))
    iex> {value.hour, info.code, info.severity, info.span}
    {13, :temporal_spelling, :info, {0, 8}}

# `value`

```elixir
@spec value(String.t(), %{span: Feel.Diagnostic.span()}, Feel.Extensions.t()) ::
  {:ok, Feel.Value.t(), [Feel.Diagnostic.t()]}
  | {:error, [Feel.Diagnostic.t(), ...]}
```

Returns the value of the literal with the infos that reading it gave, or the error. `meta` is the metadata of the
literal, with its `:span`.

---

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