Merge pull request #92 from Snapchat/lf/revert-nsobject-in-protocols

Make NSObject based protocols optional

Author: li-feng-sc

src/source/Main.scala

@@ -84,6 +84,7 @@ object Main {
     var objcppFunctionPrologueFile: Option[String] = None
     var objcppDisableExceptionTranslation: Boolean = false
     var objcFileIdentStyleOptional: Option[IdentConverter] = None
+    var objcStrictProtocol: Boolean = true
     var objcppNamespace: String = "djinni_generated"
     var objcBaseLibIncludePrefix: String = ""
     var wasmOutFolder: Option[File] = None
@@ -202,6 +203,9 @@ object Main {
         .text("Disable generating Objective-C class init helper method.")
       opt[Boolean]("objc-closed-enums").valueName("<true/false>").foreach(x => objcClosedEnums = x)
         .text("All generated Objective-C enums will be NS_CLOSED_ENUM (default: false). ")
+      opt[Boolean]("objc-strict-protocols")
+        .valueName("<true/false>").foreach(x => objcStrictProtocol = x)
+        .text("All generated @protocol will implement <NSObject> (default: true). ")
       note("")
       opt[File]("objcpp-out").valueName("<out-folder>").foreach(x => objcppOutFolder = Some(x))
         .text("The output folder for private Objective-C++ files (Generator disabled if unspecified).")
@@ -416,6 +420,7 @@ object Main {
       objcGenProtocol,
       objcDisableClassCtor,
       objcClosedEnums,
+      objcStrictProtocol,
       wasmOutFolder,
       wasmIncludePrefix,
       wasmIncludeCppPrefix,

src/source/ObjcGenerator.scala

@@ -135,7 +135,12 @@ class ObjcGenerator(spec: Spec) extends BaseObjcGenerator(spec) {
 
       w.wl
       writeDoc(w, doc)
-      if (useProtocol(i.ext, spec)) w.wl(s"@protocol $self <NSObject>") else w.wl(s"@interface $self : NSObject")
+      if (useProtocol(i.ext, spec)) {
+        val baseProtocol = if (spec.objcStrictProtocol) " <NSObject>" else ""
+        w.wl(s"@protocol $self$baseProtocol")
+      } else {
+        w.wl(s"@interface $self : NSObject")
+      }
 
       for (m <- i.methods) {
         if (!m.static || (!spec.objcGenProtocol && m.lang.objc)) {

src/source/generator.scala

@@ -88,6 +88,7 @@ package object generatorTools {
                    objcGenProtocol: Boolean,
                    objcDisableClassCtor: Boolean,
                    objcClosedEnums: Boolean,
+                   objcStrictProtocol: Boolean,
                    wasmOutFolder: Option[File],
                    wasmIncludePrefix: String,
                    wasmIncludeCppPrefix: String,