49 lines
1.5 KiB
Rust
49 lines
1.5 KiB
Rust
|
use serde_derive::Deserialize;
|
||
|
|
|
||
|
|
/// No errors expected
|
||
|
|
#[derive(Deserialize)]
|
||
|
|
struct T0(u8, u8);
|
||
|
|
|
||
|
|
/// No errors expected:
|
||
|
|
/// - if both fields are provided, both gets value from data
|
||
|
|
/// - if only one field is provided, the second gets default value
|
||
|
|
#[derive(Deserialize)]
|
||
|
|
struct T1(u8, #[serde(default)] u8);
|
||
|
|
|
||
|
|
/// Errors expected -- the first field can get default value only if sequence is
|
||
|
|
/// empty, but that mean that all other fields cannot be deserialized without
|
||
|
|
/// errors, so the `#[serde(default)]` attribute is superfluous
|
||
|
|
#[derive(Deserialize)]
|
||
|
|
struct T2(#[serde(default)] u8, u8, u8);
|
||
|
|
|
||
|
|
/// No errors expected:
|
||
|
|
/// - if both fields are provided, both gets value from data
|
||
|
|
/// - if only one field is provided, the second gets default value
|
||
|
|
/// - if none fields are provided, both gets default value
|
||
|
|
#[derive(Deserialize)]
|
||
|
|
struct T3(#[serde(default)] u8, #[serde(default)] u8);
|
||
|
|
|
||
|
|
////////////////////////////////////////////////////////////////////////////////
|
||
|
|
|
||
|
|
/// No errors expected -- missing fields gets default values
|
||
|
|
#[derive(Deserialize, Default)]
|
||
|
|
#[serde(default)]
|
||
|
|
struct T4(u8, u8);
|
||
|
|
|
||
|
|
/// No errors expected -- missing fields gets default values
|
||
|
|
#[derive(Deserialize, Default)]
|
||
|
|
#[serde(default)]
|
||
|
|
struct T5(#[serde(default)] u8, u8);
|
||
|
|
|
||
|
|
/// No errors expected -- missing fields gets default values
|
||
|
|
#[derive(Deserialize, Default)]
|
||
|
|
#[serde(default)]
|
||
|
|
struct T6(u8, #[serde(default)] u8);
|
||
|
|
|
||
|
|
/// No errors expected -- missing fields gets default values
|
||
|
|
#[derive(Deserialize, Default)]
|
||
|
|
#[serde(default)]
|
||
|
|
struct T7(#[serde(default)] u8, #[serde(default)] u8);
|
||
|
|
|
||
|
|
fn main() {}
|