enable strict concurrency in CI

.github/workflows/tests.yml

@@ -29,7 +29,7 @@ jobs:
     - name: Checkout code
       uses: actions/checkout@v4
     - name: Run tests
-      run: swift test
+      run: swift test -Xswiftc -strict-concurrency=complete
   osx:
     strategy:
       fail-fast: false
@@ -46,4 +46,4 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@v4
       - name: Run tests
-        run: swift test
+        run: swift test -Xswiftc -strict-concurrency=complete

Sources/OpenAPIKit/CodableVendorExtendable.swift

@@ -98,7 +98,7 @@ extension CodableVendorExtendable {
             throw VendorExtensionDecodingError.selfIsArrayNotDict
         }
 
-        guard let decodedAny = decoded as? [String: Any] else {
+        guard let decodedAny = decoded as? [String: any Sendable] else {
             throw VendorExtensionDecodingError.foundNonStringKeys
         }
 

Sources/OpenAPIKit/Components Object/Components.swift

@@ -15,7 +15,7 @@ extension OpenAPI {
     /// 
     /// This is a place to put reusable components to
     /// be referenced from other parts of the spec.
-    public struct Components: Equatable, CodableVendorExtendable {
+    public struct Components: Equatable, CodableVendorExtendable, Sendable {
 
         public var schemas: ComponentDictionary<JSONSchema>
         public var responses: ComponentDictionary<Response>

Sources/OpenAPIKit/Content/Content.swift

@@ -11,7 +11,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Media Type Object"
     /// 
     /// See [OpenAPI Media Type Object](https://spec.openapis.org/oas/v3.1.1.html#media-type-object).
-    public struct Content: Equatable, CodableVendorExtendable {
+    public struct Content: Equatable, CodableVendorExtendable, Sendable {
         public var schema: Either<OpenAPI.Reference<JSONSchema>, JSONSchema>?
         public var example: AnyCodable?
         public var examples: Example.Map?

Sources/OpenAPIKit/Content/ContentEncoding.swift

@@ -11,7 +11,7 @@ extension OpenAPI.Content {
     /// OpenAPI Spec "Encoding Object"
     /// 
     /// See [OpenAPI Encoding Object](https://spec.openapis.org/oas/v3.1.1.html#encoding-object).
-    public struct Encoding: Equatable {
+    public struct Encoding: Equatable, Sendable {
         public typealias Style = OpenAPI.Parameter.SchemaContext.Style
 
         public let contentTypes: [OpenAPI.ContentType]

Sources/OpenAPIKit/Encoding and Decoding Errors/DocumentDecodingError.swift

@@ -12,7 +12,7 @@ extension OpenAPI.Error.Decoding {
         public let context: Context
         public let codingPath: [CodingKey]
 
-        public enum Context {
+        public enum Context: Sendable {
             case path(Path)
             case inconsistency(InconsistencyError)
             case other(Swift.DecodingError)

Sources/OpenAPIKit/Encoding and Decoding Errors/OperationDecodingError.swift

@@ -13,7 +13,7 @@ extension OpenAPI.Error.Decoding {
         public let context: Context
         internal let relativeCodingPath: [CodingKey]
 
-        public enum Context {
+        public enum Context: Sendable {
             case request(Request)
             case response(Response)
             case inconsistency(InconsistencyError)

Sources/OpenAPIKit/Encoding and Decoding Errors/PathDecodingError.swift

@@ -13,7 +13,7 @@ extension OpenAPI.Error.Decoding {
         public let context: Context
         internal let relativeCodingPath: [CodingKey]
 
-        public enum Context {
+        public enum Context: Sendable {
             case endpoint(Operation)
             case inconsistency(InconsistencyError)
             case other(Swift.DecodingError)

Sources/OpenAPIKit/Encoding and Decoding Errors/ResponseDecodingError.swift

@@ -13,7 +13,7 @@ extension OpenAPI.Error.Decoding {
         public let context: Context
         internal let relativeCodingPath: [CodingKey]
 
-        public enum Context {
+        public enum Context: Sendable {
             case inconsistency(InconsistencyError)
             case other(Swift.DecodingError)
             case neither(EitherDecodeNoTypesMatchedError)

Sources/OpenAPIKit/Example.swift

@@ -12,7 +12,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Example Object"
     ///
     /// See [OpenAPI Example Object](https://spec.openapis.org/oas/v3.1.1.html#example-object).
-    public struct Example: Equatable, CodableVendorExtendable {
+    public struct Example: Equatable, CodableVendorExtendable, Sendable {
         public let summary: String?
         public let description: String?
 

Sources/OpenAPIKit/ExternalDocumentation.swift

@@ -12,7 +12,7 @@ extension OpenAPI {
     /// OpenAPI Spec "External Documentation Object"
     /// 
     /// See [OpenAPI External Documentation Object](https://spec.openapis.org/oas/v3.1.1.html#external-documentation-object).
-    public struct ExternalDocumentation: Equatable, CodableVendorExtendable {
+    public struct ExternalDocumentation: Equatable, CodableVendorExtendable, Sendable {
         public var description: String?
         public var url: URL
 

Sources/OpenAPIKit/ExternalLoader.swift

@@ -11,7 +11,7 @@ import Foundation
 /// An `ExternalLoader` enables `OpenAPIKit` to load external references 
 /// without knowing the details of what decoder is being used or how new internal 
 /// references should be named.
-public protocol ExternalLoader {
+public protocol ExternalLoader where Message: Sendable {
     /// This can be anything that an implementor of this protocol wants to pass back from
     /// the `load()` function and have available after all external loading has been done.
     ///

Sources/OpenAPIKit/Header/Header.swift

@@ -11,7 +11,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Header Object"
     ///
     /// See [OpenAPI Header Object](https://spec.openapis.org/oas/v3.1.1.html#header-object).
-    public struct Header: Equatable, CodableVendorExtendable {
+    public struct Header: Equatable, CodableVendorExtendable, Sendable {
         public typealias SchemaContext = Parameter.SchemaContext
 
         public let description: String?

Sources/OpenAPIKit/JSONReference.swift

@@ -39,7 +39,7 @@ import Foundation
 /// Components Object will be validated when you call `validate()` on an
 /// `OpenAPI.Document`.
 ///
-public enum JSONReference<ReferenceType: ComponentDictionaryLocatable>: Equatable, Hashable, _OpenAPIReference {
+public enum JSONReference<ReferenceType: ComponentDictionaryLocatable>: Equatable, Hashable, _OpenAPIReference, Sendable {
     /// The reference is internal to the file.
     case `internal`(InternalReference)
     /// The reference refers to another file.
@@ -124,7 +124,7 @@ public enum JSONReference<ReferenceType: ComponentDictionaryLocatable>: Equatabl
     /// `JSONReference`.
     ///
     /// This reference must start with "#".
-    public enum InternalReference: LosslessStringConvertible, RawRepresentable, Equatable, Hashable {
+    public enum InternalReference: LosslessStringConvertible, RawRepresentable, Equatable, Hashable, Sendable {
         /// The reference refers to a component (i.e. `#/components/...`).
         case component(name: String)
         /// The reference refers to some path outside the Components Object.
@@ -202,7 +202,7 @@ public enum JSONReference<ReferenceType: ComponentDictionaryLocatable>: Equatabl
     ///
     /// This path does _not_ start with "#". It starts with a forward slash. By contrast, an
     /// `InternalReference` starts with "#" and is followed by the start of a `Path`.
-    public struct Path: ExpressibleByArrayLiteral, ExpressibleByStringLiteral, LosslessStringConvertible, RawRepresentable, Equatable, Hashable {
+    public struct Path: ExpressibleByArrayLiteral, ExpressibleByStringLiteral, LosslessStringConvertible, RawRepresentable, Equatable, Hashable, Sendable {
 
         /// The Path's components. In the `rawValue`, these components are joined
         /// with forward slashes '/' per the JSON Reference specification.
@@ -312,7 +312,7 @@ extension OpenAPI {
     /// Per the specification, these summary and description overrides are irrelevant
     /// if the referenced component does not support the given attribute.
     @dynamicMemberLookup
-    public struct Reference<ReferenceType: ComponentDictionaryLocatable>: Equatable, Hashable, _OpenAPIReference {
+    public struct Reference<ReferenceType: ComponentDictionaryLocatable>: Equatable, Hashable, _OpenAPIReference, Sendable {
         public let jsonReference: JSONReference<ReferenceType>
         public let summary: String?
         public let description: String?

Sources/OpenAPIKit/Link.swift

@@ -16,7 +16,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Link Object"
     ///
     /// See [OpenAPI Link Object](https://spec.openapis.org/oas/v3.1.1.html#link-object).
-    public struct Link: Equatable, CodableVendorExtendable {
+    public struct Link: Equatable, CodableVendorExtendable, Sendable {
         /// The **OpenAPI**` `operationRef` or `operationId` field, depending on whether
         /// a `URL` of a remote or local Operation Object or a `operationId` (String) of an
         /// operation defined in the same document is given.

Sources/OpenAPIKit/Operation/Operation.swift

@@ -11,7 +11,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Operation Object"
     /// 
     /// See [OpenAPI Operation Object](https://spec.openapis.org/oas/v3.1.1.html#operation-object).
-    public struct Operation: Equatable, CodableVendorExtendable {
+    public struct Operation: Equatable, CodableVendorExtendable, Sendable {
         public var tags: [String]?
         public var summary: String?
         public var description: String?

Sources/OpenAPIKit/Parameter/Parameter.swift

@@ -11,7 +11,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Parameter Object"
     /// 
     /// See [OpenAPI Parameter Object](https://spec.openapis.org/oas/v3.1.1.html#parameter-object).
-    public struct Parameter: Equatable, CodableVendorExtendable {
+    public struct Parameter: Equatable, CodableVendorExtendable, Sendable {
         public var name: String
 
         /// OpenAPI Spec "in" property determines the `Context`.

Sources/OpenAPIKit/Parameter/ParameterContext.swift

@@ -16,7 +16,7 @@ extension OpenAPI.Parameter {
     /// all optional by default unless you pass
     /// `required: true` to the context construction.
     /// Path parameters are always required.
-    public enum Context: Equatable {
+    public enum Context: Equatable, Sendable {
         case query(required: Bool, allowEmptyValue: Bool)
         case header(required: Bool)
         case path

Sources/OpenAPIKit/Parameter/ParameterSchemaContext.swift

@@ -12,7 +12,7 @@ extension OpenAPI.Parameter {
     ///
     /// See [OpenAPI Parameter Object](https://spec.openapis.org/oas/v3.1.1.html#parameter-object)
     /// and [OpenAPI Style Values](https://spec.openapis.org/oas/v3.1.1.html#style-values).
-    public struct SchemaContext: Equatable {
+    public struct SchemaContext: Equatable, Sendable {
         public var style: Style
         public var explode: Bool
         public var allowReserved: Bool //defaults to false

Sources/OpenAPIKit/Path Item/PathItem.swift

@@ -21,7 +21,7 @@ extension OpenAPI {
     ///
     /// You can access an array of equatable `HttpMethod`/`Operation` paris with the
     /// `endpoints` property.
-    public struct PathItem: Equatable, CodableVendorExtendable {
+    public struct PathItem: Equatable, CodableVendorExtendable, Sendable {
         public var summary: String?
         public var description: String?
         public var servers: [OpenAPI.Server]?

Sources/OpenAPIKit/Request/Request.swift

@@ -11,7 +11,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Request Body Object"
     ///
     /// See [OpenAPI Request Body Object](https://spec.openapis.org/oas/v3.1.1.html#request-body-object).
-    public struct Request: Equatable, CodableVendorExtendable {
+    public struct Request: Equatable, CodableVendorExtendable, Sendable {
         public var description: String?
         public var content: Content.Map
         public var required: Bool

Sources/OpenAPIKit/Response/Response.swift

@@ -11,7 +11,7 @@ extension OpenAPI {
     /// OpenAPI Spec "Response Object"
     ///
     /// See [OpenAPI Response Object](https://spec.openapis.org/oas/v3.1.1.html#response-object).
-    public struct Response: Equatable, CodableVendorExtendable {
+    public struct Response: Equatable, CodableVendorExtendable, Sendable {
         public var description: String
         public var headers: Header.Map?
         /// An empty Content map will be omitted from encoding.

Sources/OpenAPIKit/RuntimeExpression.swift

@@ -12,7 +12,7 @@ extension OpenAPI {
     ///
     /// See [OpenAPI Runtime Expression[(https://spec.openapis.org/oas/v3.1.1.html#runtime-expressions).
     ///
-    public enum RuntimeExpression: RawRepresentable, Equatable {
+    public enum RuntimeExpression: RawRepresentable, Equatable, Sendable {
         case url
         case method
         case statusCode
@@ -74,7 +74,7 @@ extension OpenAPI {
             return nil
         }
 
-        public enum Source: RawRepresentable, Equatable {
+        public enum Source: RawRepresentable, Equatable, Sendable {
             /// A reference to one of the header parameters.
             case header(name: String)
             /// A reference to one of the query parameters.

Sources/OpenAPIKit/Schema Object/DereferencedJSONSchema.swift

@@ -10,7 +10,7 @@ import OpenAPIKitCore
 /// A `JSONSchema` type that guarantees none of its
 /// nodes are references.
 @dynamicMemberLookup
-public enum DereferencedJSONSchema: Equatable, JSONSchemaContext {
+public enum DereferencedJSONSchema: Equatable, JSONSchemaContext, Sendable {
     public typealias CoreContext<Format: OpenAPIFormat> = JSONSchema.CoreContext<Format>
     public typealias NumericContext = JSONSchema.NumericContext
     public typealias IntegerContext = JSONSchema.IntegerContext
@@ -265,7 +265,7 @@ extension DereferencedJSONSchema {
     }
 
     /// The context that only applies to `.array` schemas.
-    public struct ArrayContext: Equatable {
+    public struct ArrayContext: Equatable, Sendable {
         /// A JSON Type Node that describes
         /// the type of each element in the array.
         public let items: DereferencedJSONSchema?
@@ -333,7 +333,7 @@ extension DereferencedJSONSchema {
     }
 
     /// The context that only applies to `.object` schemas.
-    public struct ObjectContext: Equatable {
+    public struct ObjectContext: Equatable, Sendable {
         public let maxProperties: Int?
         let _minProperties: Int?
         public let properties: OrderedDictionary<String, DereferencedJSONSchema>

Sources/OpenAPIKit/Schema Object/JSONSchema+Combining.swift

@@ -62,7 +62,7 @@ public func ~=(lhs: JSONSchemaResolutionError, rhs: JSONSchemaResolutionError) -
 /// I expect this to be an area where I may want to make fixes and add
 /// errors without breaknig changes, so this annoying workaround for
 /// the absense of a "non-frozen" enum is a must.
-internal enum _JSONSchemaResolutionError: CustomStringConvertible, Equatable {
+internal enum _JSONSchemaResolutionError: CustomStringConvertible, Equatable, Sendable {
     case unsupported(because: String)
     case typeConflict(original: JSONType, new: JSONType)
     case formatConflict(original: String, new: String)

Sources/OpenAPIKit/Schema Object/JSONSchema.swift

@@ -10,7 +10,7 @@ import OpenAPIKitCore
 /// OpenAPI "Schema Object"
 /// 
 /// See [OpenAPI Schema Object](https://spec.openapis.org/oas/v3.1.1.html#schema-object).
-public struct JSONSchema: JSONSchemaContext, HasWarnings {
+public struct JSONSchema: JSONSchemaContext, HasWarnings, Sendable {
 
     public let warnings: [OpenAPI.Warning]
     public var value: Schema
@@ -68,7 +68,7 @@ public struct JSONSchema: JSONSchemaContext, HasWarnings {
         .init(schema: .fragment(core))
     }
 
-    public enum Schema: Equatable {
+    public enum Schema: Equatable, Sendable {
         /// The null type, which replaces the functionality of the `nullable` property from
         /// previous versions of the OpenAPI specification.
         case null(CoreContext<JSONTypeFormat.AnyFormat>)
@@ -2151,7 +2151,7 @@ extension JSONSchema: Decodable {
             throw VendorExtensionDecodingError.selfIsArrayNotDict
         }
 
-        guard let decodedAny = decoded as? [String: Any] else {
+        guard let decodedAny = decoded as? [String: any Sendable] else {
             throw VendorExtensionDecodingError.foundNonStringKeys
         }
 

Sources/OpenAPIKit/Schema Object/JSONSchemaContext.swift

@@ -12,7 +12,7 @@ import OpenAPIKitCore
 /// A schema context stores information about a schema.
 /// All schemas can have the contextual information in
 /// this protocol.
-public protocol JSONSchemaContext {
+public protocol JSONSchemaContext: Sendable {
     /// The format of the schema as a string value.
     ///
     /// This can be set even when a schema type has
@@ -574,8 +574,8 @@ extension JSONSchema {
     /// `IntegerContext` _can_ be asked for the
     /// `NumericContext` that would describe it via its
     /// `numericContext` property.
-    public struct NumericContext: Equatable {
-        public struct Bound: Equatable {
+    public struct NumericContext: Equatable, Sendable {
+        public struct Bound: Equatable, Sendable {
             public let value: Double
             public let exclusive: Bool
 
@@ -610,8 +610,8 @@ extension JSONSchema {
     }
 
     /// The context that only applies to `.integer` schemas.
-    public struct IntegerContext: Equatable {
-        public struct Bound: Equatable {
+    public struct IntegerContext: Equatable, Sendable {
+        public struct Bound: Equatable, Sendable {
             public let value: Int
             public let exclusive: Bool
 
@@ -696,7 +696,7 @@ extension JSONSchema {
     }
 
     /// The context that only applies to `.array` schemas.
-    public struct ArrayContext: Equatable {
+    public struct ArrayContext: Equatable, Sendable {
         /// A JSON Type Node that describes
         /// the type of each element in the array.
         public let items: JSONSchema?
@@ -729,7 +729,7 @@ extension JSONSchema {
     }
 
     /// The context that only applies to `.object` schemas.
-    public struct ObjectContext: Equatable {
+    public struct ObjectContext: Equatable, Sendable {
         /// The maximum number of properties the object
         /// is allowed to have.
         public let maxProperties: Int?
@@ -796,7 +796,7 @@ extension JSONSchema {
     }
 
     /// The context that only applies to `.string` schemas.
-    public struct StringContext: Equatable {
+    public struct StringContext: Equatable, Sendable {
         public let maxLength: Int?
         let _minLength: Int?
 
@@ -833,7 +833,7 @@ extension JSONSchema {
 
 extension OpenAPI {
     /// An encoding, as specified in RFC 2045, part 6.1 and RFC 4648.
-    public enum ContentEncoding: String, Codable {
+    public enum ContentEncoding: String, Codable, Sendable {
         case _7bit = "7bit"
         case _8bit = "8bit"
         case binary