This combines deserialize_newtype_struct, deserialize_tuple_struct,
and deserialize_tuple_variant into a single method deserialize_tuple,
as well as deserialize_struct and deserialize_struct_variant into a
single method deserialize_struct. No behavior changes.
feat(codegen): Detect repeated struct field when deserializing
Addresses #59. Let me know whether you think we need an escape hatch to opt out of this check.
Dependencies were updated in previous commit. (For supporting current
Nightly Rust.)
I guess this shouldn't affect our client interface -- which is why these
dependency bumps only get patch level version number updates for Serde,
I presume?
Result<T, E> aliases usually provide one or both of `T` and `E`. This
would cause an error when using deserialize_with:
error: wrong number of type arguments: expected 1, found 2
which unhelpfully just pointed to `#[derive(Deserialize)]`
The generated code for a struct like:
struct Test<A, B, C> {
a: X<A>
#[serde(skip_serializing)]
b: B
#[serde(serialize_with="...")]
c: C
}
Used to be:
impl<A, B, C> Serialize for Test<A, B, C>
where A: Serialize,
B: Serialize,
C: Serialize,
{ ... }
Now it is:
impl<A, B, C> Serialize for Test<A, B, C>
where X<A>: Serialize,
{ ... }
Both `skip_serializing` and `serialize_with` mean the type does not need to
implement `Serialize`.
This allows a field to be deserialized with an expression instead
of the default deserializer. This simplifies deserializing a struct
or enum that contains an external type that doesn't implement
`serde::Deserialize`. This expression is passed a variable
`deserializer` that needs to be used to deserialize the expression.
This allows a field to be serialized with an expression instead
of the default serializer. This simplifies serializing a struct
or enum that contains an external type that doesn't implement
`serde::Serialize`. This expression is passed a variable
`serializer` that needs to be used to serialize the expression.
This allows end users to use an arbitrary expression to decide whether
or not to serialize some field. This expression has access to all the
fields in the struct, but none of the internal state of the Serialize
implementation. For structs, serde implements this by creating a
temporary trait and implementing the struct for it. For struct variants,
the fields are copied by reference into a temporary struct first
before implementing the temporary trait.
This also fixes a bug where the serde_codegen wasn't making calls to
Serializer::serialize_{tuple,struct}_variant{,_elt}.
David Tolnay