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Support flattened untagged Options in struct fields

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This commit is contained in:
David Tolnay
2018-05-11 22:14:16 -07:00
parent 35aae92b56
commit 4305260174
5 changed files with 114 additions and 10 deletions
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test_suite/tests/test_annotations.rs
+81
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@@ -2095,3 +2095,84 @@ fn test_flatten_untagged_enum() {
],
);
}
#[test]
fn test_flatten_option() {
#[derive(Serialize, Deserialize, PartialEq, Debug)]
struct Outer {
#[serde(flatten)]
inner1: Option<Inner1>,
#[serde(flatten)]
inner2: Option<Inner2>,
}
#[derive(Serialize, Deserialize, PartialEq, Debug)]
struct Inner1 {
inner1: i32,
}
#[derive(Serialize, Deserialize, PartialEq, Debug)]
struct Inner2 {
inner2: i32,
}
assert_tokens(
&Outer {
inner1: Some(Inner1 {
inner1: 1,
}),
inner2: Some(Inner2 {
inner2: 2,
}),
},
&[
Token::Map { len: None },
Token::Str("inner1"),
Token::I32(1),
Token::Str("inner2"),
Token::I32(2),
Token::MapEnd,
],
);
assert_tokens(
&Outer {
inner1: Some(Inner1 {
inner1: 1,
}),
inner2: None,
},
&[
Token::Map { len: None },
Token::Str("inner1"),
Token::I32(1),
Token::MapEnd,
],
);
assert_tokens(
&Outer {
inner1: None,
inner2: Some(Inner2 {
inner2: 2,
}),
},
&[
Token::Map { len: None },
Token::Str("inner2"),
Token::I32(2),
Token::MapEnd,
],
);
assert_tokens(
&Outer {
inner1: None,
inner2: None,
},
&[
Token::Map { len: None },
Token::MapEnd,
],
);
}