5b815b7001
As discussed in #1013, serialize_with functions attached to variants receive an argument for each inner value contained within the variant. Internally such a function is wired up to the serializer as if the variant were a newtype variant.
26 lines
852 B
Rust
26 lines
852 B
Rust
// Copyright 2017 Serde Developers
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#[macro_use]
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extern crate serde_derive;
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#[derive(Serialize)] //~ ERROR: proc-macro derive panicked
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//~^ HELP: variant `Tuple` cannot have both #[serde(serialize_with)] and a field 0 marked with #[serde(skip_serializing)]
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enum Enum {
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#[serde(serialize_with = "serialize_some_other_variant")]
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Tuple(#[serde(skip_serializing)] String, u8),
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}
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fn serialize_some_other_variant<S>(_: &String, _: Option<&u8>, _: S) -> StdResult<S::Ok, S::Error>
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where S: Serializer,
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{
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unimplemented!()
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}
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fn main() { }
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