Function emit_hl_unmarshal_value 

pub fn emit_hl_unmarshal_value(
    s: &mut State<'_, '_>,
    id: Ident,
    vt: &Value<'_>,
) -> TokenStream

Emit code to unmarshal a value into an inline-able value type

• id: an ident of a slice that the code will unmarshal from; also used as the beginning of any other identifiers that this code declares (if only we had hygiene in stable rust…)
• vt: the value type that we are unmarshalling

The token stream produced will be an expression which typechecks as a tuple whose first component is the Rust type (as defined by the crate::rtypes module) of the given value type and whose second component is an integer. The second component represents the number of bytes consumed from the id slice while unmarshalling.