minor performance tweaks (#233)

Author: Thorium

src/SwaggerProvider.DesignTime/v2/Parser/Schema.fs

@@ -69,6 +69,7 @@ and DefinitionProperty =
 
 /// The type of the REST call.
 /// http://swagger.io/specification/#pathItemObject
+[<Struct>]
 type OperationType =
     /// Returns en element or collection.
     | Get
@@ -94,6 +95,7 @@ type OperationType =
 
 
 /// Determines the format of the array if type array is used. Array value separator.
+[<Struct>]
 type CollectionFormat =
     /// Comma separated values.
     | Csv
@@ -116,6 +118,7 @@ type CollectionFormat =
 
 
 /// Required. The location of the parameter.
+[<Struct>]
 type ParameterObjectLocation =
     /// Parameter that are appended to the URL. For example, in /items?id=###, the query parameter is id.
     | Query
@@ -194,6 +197,7 @@ type OperationObject =
 
 /// Basic swagger information, relevant to the type provider.
 /// http://swagger.io/specification/#infoObject
+[<Struct>]
 type InfoObject =
     {
         /// Required. The title of the application.
@@ -207,6 +211,7 @@ type InfoObject =
 
 /// Allows adding meta data to a single tag.
 /// http://swagger.io/specification/#tagObject
+[<Struct>]
 type TagObject =
     {
         /// Required. The name of the tag.

src/SwaggerProvider.DesignTime/v3/DefinitionCompiler.fs

@@ -369,7 +369,7 @@ type DefinitionCompiler(schema: OpenApiDocument, provideNullable) as this =
             match schemaObj with
             | null -> failwithf $"Cannot compile object '%s{tyName}' when schema is 'null'"
             | _ when
-                schemaObj.Reference <> null
+                (not(isNull schemaObj.Reference))
                 && not <| schemaObj.Reference.Id.EndsWith(tyName)
                 ->
                 ns.ReleaseNameReservation tyName
@@ -382,15 +382,18 @@ type DefinitionCompiler(schema: OpenApiDocument, provideNullable) as this =
                 | _ -> failwithf $"Cannot compile object '%s{tyName}' based on unresolved reference '{schemaObj.Reference.ReferenceV3}'"
             // TODO: fail on external references
             //| _ when schemaObj.Reference <> null && tyName <> schemaObj.Reference.Id ->
-            | _ when schemaObj.Type = "object" && schemaObj.AdditionalProperties <> null -> // Dictionary ->
+            | _ when
+                schemaObj.Type = "object"
+                && not(isNull schemaObj.AdditionalProperties)
+                -> // Dictionary ->
                 ns.ReleaseNameReservation tyName
                 let elSchema = schemaObj.AdditionalProperties
 
                 let elTy =
                     compileBySchema ns (ns.ReserveUniqueName tyName "Item") elSchema true ns.RegisterType false
 
                 ProvidedTypeBuilder.MakeGenericType(typedefof<Map<string, obj>>, [ typeof<string>; elTy ])
-            | _ when schemaObj.Type = null || schemaObj.Type = "object" -> // Object props ->
+            | _ when isNull schemaObj.Type || schemaObj.Type = "object" -> // Object props ->
                 compileNewObject()
             | _ ->
                 ns.MarkTypeAsNameAlias tyName

src/SwaggerProvider.DesignTime/v3/OperationCompiler.fs

@@ -21,6 +21,7 @@ open Swagger.Internal
 // Probably related to https://github.com/fsprojects/FSharp.TypeProviders.SDK/issues/274
 type ApiCall = string * OpenApiPathItem * OperationType
 
+[<Struct>]
 type PayloadType =
     | NoData
     | AppJson
@@ -218,9 +219,9 @@ type OperationCompiler(schema: OpenApiDocument, defCompiler: DefinitionCompiler,
 
                         let headers =
                             <@
-                                [ if payloadMime <> null then
+                                [ if not(isNull payloadMime) then
                                       "Content-Type", payloadMime
-                                  if retMime <> null then
+                                  if not(isNull retMime) then
                                       "Accept", MediaTypes.ApplicationJson ]
                             @>