mirror of
https://github.com/pezkuwichain/serde.git
synced 2026-04-23 00:08:01 +00:00
Allow #[serde(default)] on tuple structs
This commit is contained in:
Mingun
@@ -1,4 +1,4 @@
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error: #[serde(default)] can only be used on structs with named fields
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error: #[serde(default)] can only be used on structs with fields
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--> tests/ui/default-attribute/enum.rs:4:9
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4 | #[serde(default)]
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@@ -1,4 +1,4 @@
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error: #[serde(default = "...")] can only be used on structs with named fields
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error: #[serde(default = "...")] can only be used on structs with fields
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--> tests/ui/default-attribute/enum_path.rs:4:9
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4 | #[serde(default = "default_e")]
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@@ -1,7 +0,0 @@
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use serde_derive::Deserialize;
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#[derive(Deserialize)]
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#[serde(default)]
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struct T(u8, u8);
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fn main() {}
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@@ -1,5 +0,0 @@
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error: #[serde(default)] can only be used on structs with named fields
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--> tests/ui/default-attribute/nameless_struct_fields.rs:5:9
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5 | struct T(u8, u8);
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| ^^^^^^^^
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@@ -1,7 +0,0 @@
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use serde_derive::Deserialize;
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#[derive(Deserialize)]
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#[serde(default = "default_t")]
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struct T(u8, u8);
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fn main() {}
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@@ -1,5 +0,0 @@
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error: #[serde(default = "...")] can only be used on structs with named fields
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--> tests/ui/default-attribute/nameless_struct_fields_path.rs:4:9
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4 | #[serde(default = "default_t")]
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| ^^^^^^^^^^^^^^^^^^^^^
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@@ -0,0 +1,48 @@
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use serde_derive::Deserialize;
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/// No errors expected
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#[derive(Deserialize)]
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struct T0(u8, u8);
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/// No errors expected:
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/// - if both fields are provided, both gets value from data
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/// - if only one field is provided, the second gets default value
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#[derive(Deserialize)]
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struct T1(u8, #[serde(default)] u8);
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/// Errors expected -- the first field can get default value only if sequence is
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/// empty, but that mean that all other fields cannot be deserialized without
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/// errors, so the `#[serde(default)]` attribute is superfluous
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#[derive(Deserialize)]
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struct T2(#[serde(default)] u8, u8, u8);
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/// No errors expected:
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/// - if both fields are provided, both gets value from data
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/// - if only one field is provided, the second gets default value
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/// - if none fields are provided, both gets default value
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#[derive(Deserialize)]
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struct T3(#[serde(default)] u8, #[serde(default)] u8);
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////////////////////////////////////////////////////////////////////////////////
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize, Default)]
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#[serde(default)]
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struct T4(u8, u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize, Default)]
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#[serde(default)]
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struct T5(#[serde(default)] u8, u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize, Default)]
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#[serde(default)]
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struct T6(u8, #[serde(default)] u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize, Default)]
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#[serde(default)]
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struct T7(#[serde(default)] u8, #[serde(default)] u8);
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fn main() {}
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@@ -0,0 +1,11 @@
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error: struct or field must have #[serde(default)] because previous field 0 have #[serde(default)]
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--> tests/ui/default-attribute/tuple_struct.rs:17:33
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17 | struct T2(#[serde(default)] u8, u8, u8);
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| ^^
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error: struct or field must have #[serde(default)] because previous field 0 have #[serde(default)]
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--> tests/ui/default-attribute/tuple_struct.rs:17:37
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17 | struct T2(#[serde(default)] u8, u8, u8);
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| ^^
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@@ -0,0 +1,77 @@
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use serde_derive::Deserialize;
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fn d<T>() -> T {
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unimplemented!()
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}
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/// No errors expected:
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/// - if both fields are provided, both gets value from data
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/// - if only one field is provided, the second gets default value
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#[derive(Deserialize)]
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struct T1(u8, #[serde(default = "d")] u8);
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/// Errors expected -- the first field can get default value only if sequence is
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/// empty, but that mean that all other fields cannot be deserialized without
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/// errors, so the `#[serde(default)]` attribute is superfluous
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#[derive(Deserialize)]
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struct T2(#[serde(default = "d")] u8, u8, u8);
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/// No errors expected:
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/// - if both fields are provided, both gets value from data
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/// - if only one field is provided, the second gets default value
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/// - if none fields are provided, both gets default value
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#[derive(Deserialize)]
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struct T3(#[serde(default = "d")] u8, #[serde(default = "d")] u8);
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////////////////////////////////////////////////////////////////////////////////
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize, Default)]
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#[serde(default)]
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struct T1D(#[serde(default = "d")] u8, u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize, Default)]
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#[serde(default)]
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struct T2D(u8, #[serde(default = "d")] u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize, Default)]
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#[serde(default)]
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struct T3D(#[serde(default = "d")] u8, #[serde(default = "d")] u8);
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////////////////////////////////////////////////////////////////////////////////
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize)]
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#[serde(default = "d")]
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struct T1Path(#[serde(default)] u8, u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize)]
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#[serde(default = "d")]
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struct T2Path(u8, #[serde(default)] u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize)]
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#[serde(default = "d")]
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struct T3Path(#[serde(default)] u8, #[serde(default)] u8);
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////////////////////////////////////////////////////////////////////////////////
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize)]
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#[serde(default = "d")]
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struct T1PathD(#[serde(default = "d")] u8, u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize)]
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#[serde(default = "d")]
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struct T2PathD(u8, #[serde(default = "d")] u8);
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/// No errors expected -- missing fields gets default values
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#[derive(Deserialize)]
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#[serde(default = "d")]
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struct T3PathD(#[serde(default = "d")] u8, #[serde(default = "d")] u8);
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fn main() {}
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@@ -0,0 +1,11 @@
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error: struct or field must have #[serde(default)] because previous field 0 have #[serde(default)]
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--> tests/ui/default-attribute/tuple_struct_path.rs:17:39
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17 | struct T2(#[serde(default = "d")] u8, u8, u8);
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| ^^
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error: struct or field must have #[serde(default)] because previous field 0 have #[serde(default)]
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--> tests/ui/default-attribute/tuple_struct_path.rs:17:43
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17 | struct T2(#[serde(default = "d")] u8, u8, u8);
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| ^^
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