don't use Swift 5.3 language features

Author: mattpolzin

Sources/JSONAPI/Resource/Relationship.swift

@@ -52,27 +52,31 @@ public struct ToOneRelationship<Identifiable: JSONAPI.JSONAPIIdentifiable, IdMet
     public let meta: MetaType
     public let links: LinksType
 
-    public init(id: Identifiable.ID, meta: MetaType, links: LinksType) where IdMetaType == NoIdMetadata {
-        self.id = id
-        self.idMeta = .none
+    public init(id: (Identifiable.ID, IdMetaType), meta: MetaType, links: LinksType) {
+        self.id = id.0
+        self.idMeta = id.1
         self.meta = meta
         self.links = links
     }
+}
 
-    public init(id: (Identifiable.ID, IdMetaType), meta: MetaType, links: LinksType) {
-        self.id = id.0
-        self.idMeta = id.1
+extension ToOneRelationship where IdMetaType == NoIdMetadata {
+    public init(id: Identifiable.ID, meta: MetaType, links: LinksType) {
+        self.id = id
+        self.idMeta = .none
         self.meta = meta
         self.links = links
     }
 }
 
 extension ToOneRelationship where MetaType == NoMetadata, LinksType == NoLinks {
-    public init(id: Identifiable.ID) where IdMetaType == NoIdMetadata {
+    public init(id: (Identifiable.ID, IdMetaType)) {
         self.init(id: id, meta: .none, links: .none)
     }
+}
 
-    public init(id: (Identifiable.ID, IdMetaType)) {
+extension ToOneRelationship where IdMetaType == NoIdMetadata, MetaType == NoMetadata, LinksType == NoLinks {
+    public init(id: Identifiable.ID) {
         self.init(id: id, meta: .none, links: .none)
     }
 }
@@ -138,13 +142,6 @@ public struct ToManyRelationship<Relatable: JSONAPI.Relatable, IdMetaType: JSONA
     public let meta: MetaType
     public let links: LinksType
 
-
-    public init(ids: [Relatable.ID], meta: MetaType, links: LinksType) where IdMetaType == NoIdMetadata {
-        self.metaIds = ids.map { .init(id: $0, meta: .none) }
-        self.meta = meta
-        self.links = links
-    }
-
     public init(idsWithMetadata ids: [(Relatable.ID, IdMetaType)], meta: MetaType, links: LinksType) {
         self.metaIds = ids.map(ID.init)
         self.meta = meta
@@ -170,11 +167,15 @@ public struct ToManyRelationship<Relatable: JSONAPI.Relatable, IdMetaType: JSONA
     }
 }
 
-extension ToManyRelationship where MetaType == NoMetadata, LinksType == NoLinks {
-
-    public init(ids: [Relatable.ID]) where IdMetaType == NoIdMetadata {
-        self.init(ids: ids, meta: .none, links: .none)
+extension ToManyRelationship where IdMetaType == NoIdMetadata {
+    public init(ids: [Relatable.ID], meta: MetaType, links: LinksType) {
+        self.metaIds = ids.map { .init(id: $0, meta: .none) }
+        self.meta = meta
+        self.links = links
     }
+}
+
+extension ToManyRelationship where MetaType == NoMetadata, LinksType == NoLinks {
 
     public init(idsWithMetadata ids: [(Relatable.ID, IdMetaType)]) {
         self.init(idsWithMetadata: ids, meta: .none, links: .none)
@@ -193,6 +194,12 @@ extension ToManyRelationship where MetaType == NoMetadata, LinksType == NoLinks
     }
 }
 
+extension ToManyRelationship where IdMetaType == NoIdMetadata, MetaType == NoMetadata, LinksType == NoLinks {
+    public init(ids: [Relatable.ID]) {
+        self.init(ids: ids, meta: .none, links: .none)
+    }
+}
+
 public protocol JSONAPIIdentifiable: JSONTyped {
     associatedtype ID: Equatable
 }