Swift4: Fix issue 6746 - problem with arrays of primitives (#7072)

* Update samples using latest codegen and templates

* Fix issue 6746 - problem with array models where array element type is a primitive

modules/swagger-codegen/src/main/resources/swift4/model.mustache

@@ -11,7 +11,7 @@ import Foundation
 
 /** {{description}} */{{/description}}
 {{#isArrayModel}}
-public typealias {{classname}} = [{{arrayModelType}}]
+public typealias {{classname}} = {{parent}}
 {{/isArrayModel}}
 {{^isArrayModel}}
 {{#isEnum}}

modules/swagger-codegen/src/test/resources/2_0/swift4Test.json

@@ -251,6 +251,28 @@
       },
       "description": "Example Error object"
     },
+    "ModelStringArray": {
+      "type": "array",
+      "description": "This defines an array of strings.",
+      "items": {
+        "type": "string"
+      }
+    },
+    "ModelDoubleArray": {
+      "type": "array",
+      "description": "This defines an array of doubles.",
+      "items": {
+        "type": "number",
+        "format": "double"
+      }
+    },
+    "ModelErrorInfoArray": {
+      "type": "array",
+      "description": "This defines an array of ErrorInfo objects.",
+      "items": {
+        "$ref": "#/definitions/ErrorInfo"
+      }
+    },
     "VariableNameTest": {
       "description": "This object contains property names which we know will be different from their variable name. Examples of this include snake case property names and property names which are Swift 4 reserved words.",
       "type": "object",

samples/client/test/swift4/default/TestClient/Classes/Swaggers/Models/ModelDoubleArray.swift

@@ -0,0 +1,12 @@
+//
+// ModelDoubleArray.swift
+//
+// Generated by swagger-codegen
+// https://github.com/swagger-api/swagger-codegen
+//
+
+import Foundation
+
+
+/** This defines an array of doubles. */
+public typealias ModelDoubleArray = [Double]

samples/client/test/swift4/default/TestClient/Classes/Swaggers/Models/ModelErrorInfoArray.swift

@@ -0,0 +1,12 @@
+//
+// ModelErrorInfoArray.swift
+//
+// Generated by swagger-codegen
+// https://github.com/swagger-api/swagger-codegen
+//
+
+import Foundation
+
+
+/** This defines an array of ErrorInfo objects. */
+public typealias ModelErrorInfoArray = [ErrorInfo]

samples/client/test/swift4/default/TestClient/Classes/Swaggers/Models/ModelStringArray.swift

@@ -0,0 +1,12 @@
+//
+// ModelStringArray.swift
+//
+// Generated by swagger-codegen
+// https://github.com/swagger-api/swagger-codegen
+//
+
+import Foundation
+
+
+/** This defines an array of strings. */
+public typealias ModelStringArray = [String]