Refactor enums (#289)

Refactor enum implemenation by keeping things DRY. This PR adds
better foundation over furhter development of features concerning enums.

Aslo remove the limitation of not allowing `schema` attribute to be used on
`oneOf` complex enum type. This allows defining of `default` and `example`
attribute over complex enum via `schema` attribute of `ToSchema` derive macro.

The enum refactoring is not complete but this PR will be first one in the serie of 
coming improvements and new features.

relates to #285

.github/workflows/build.yaml

@@ -67,7 +67,7 @@ jobs:
           if [[ "${{ matrix.testset }}" == "utoipa" ]] && [[ ${{ steps.changes.outputs.utoipa_changed }} == true ]]; then
             cargo test -p utoipa --features openapi_extensions,yaml
           elif [[ "${{ matrix.testset }}" == "utoipa-gen" ]] && [[ ${{ steps.changes.outputs.gen_changed }} == true ]]; then
-            cargo test -p utoipa-gen --features utoipa/actix_extras,chrono,decimal,json,utoipa/uuid,utoipa/json,utoipa/time,time
+            cargo test -p utoipa-gen --features utoipa/actix_extras,chrono,decimal,json,utoipa/uuid,utoipa/json,utoipa/time,time,utoipa/repr
 
             cargo test -p utoipa-gen --test path_response_derive_test_no_serde_json --no-default-features
             cargo test -p utoipa-gen --test schema_derive_no_serde_json --no-default-features

README.md

@@ -76,8 +76,8 @@ and the `ipa` is _api_ reversed. Aaand... `ipa` is also awesome type of beer :be
 - **smallvec** Add support for [smallvec](https://crates.io/crates/smallvec). `SmallVec` will be treated as `Vec`.
 - **openapi_extensions** Adds traits and functions that provide extra convenience functions.
   See the [`request_body` docs](https://docs.rs/utoipa/latest/utoipa/openapi/request_body) for an example.
-- **repr** Add support for `repr(u*)` and `repr(i*)` attributes for fieldless enums.
-  See [docs](https://docs.rs/utoipa/latest/utoipa/derive.ToSchema.html) for more details.
+- **repr** Add support for [repr_serde](https://github.com/dtolnay/serde-repr)'s `repr(u*)` and `repr(i*)` attributes to unit type enums for
+  C-like enum representation. See [docs](https://docs.rs/utoipa/latest/utoipa/derive.ToSchema.html) for more details.
 
 Utoipa implicitly has partial support for `serde` attributes. See [docs](https://docs.rs/utoipa/latest/utoipa/derive.ToSchema.html#partial-serde-attributes-support) for more details.
 

scripts/test.sh

@@ -9,7 +9,7 @@ echo "Testing crate: $crate..."
 if [[ "$crate" == "utoipa" ]]; then
     cargo test -p utoipa --features openapi_extensions
 elif [[ "$crate" == "utoipa-gen" ]]; then
-    cargo test -p utoipa-gen --features utoipa/actix_extras,chrono,decimal,json,utoipa/uuid,utoipa/json,utoipa/time,time
+    cargo test -p utoipa-gen --features utoipa/actix_extras,chrono,decimal,json,utoipa/uuid,utoipa/json,utoipa/time,time,utoipa/repr
 
     cargo test -p utoipa-gen --test path_response_derive_test_no_serde_json --no-default-features
     cargo test -p utoipa-gen --test schema_derive_no_serde_json --no-default-features