Function deserialize

src/lowertest/src/lib.rs:143–155

Deserialize the next `TokenTree` into a `D` object. See [`to_json`] for the object spec syntax. `type_name` should be `D` in string form. `stream_iter` will advance by one `TokenTree` no matter the result.

(
    stream_iter: &mut I,
    type_name: &'static str,
    ctx: &mut C,
)

///
/// `stream_iter` will advance by one `TokenTree` no matter the result.
pub fn deserialize<D, I, C>(
    stream_iter: &mut I,
    type_name: &'static str,
    ctx: &mut C,
) -> Result<D, String>
where
    C: TestDeserializeContext,
    D: DeserializeOwned + MzReflect,
    I: Iterator<Item = TokenTree>,
{
    deserialize_optional(stream_iter, type_name, ctx)?
        .ok_or_else(|| format!("Empty spec for type {}", type_name))
}

/// Converts the next part of the stream into JSON deserializable into an object
/// of type `type_name`.