Add support for unit structs #392
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This PR will add support for unit type structs to be declared with
`#[derive(ToSchema)]`. Previously only struct either with named fiels or
unnamed fields and enums where supported.
According serde serialization unit type struct will be serialized as
`null` but the support for utoipa `ToSchema` was lacking in this aspect.
Add suport for the definition:
```rust
struct UnitValue;
// .... results following specification:
utoipa::openapi::schema::ObjectBuilder::new()
.nullable(true)
.default(Some(serde_json::json!(null)))
.example(Some(serde_json::json!(null)))
```
Above definition will get serialized as `null`.
juhaku
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This PR will add support for unit type structs to be declared with
#[derive(ToSchema)]. Previously only struct either with named fiels or unnamed fields and enums where supported.According serde serialization unit type struct will be serialized as
nullbut the support for utoipaToSchemawas lacking in this aspect.Add suport for the definition:
Above definition will get serialized as
null.Resolves #332