Add support for primitives in interface files.

Author: cristianoc

reason-react-example/src/interop/MyBannerRe.re

@@ -1,19 +1,14 @@
-/**
- *  ReactJS used by ReasonReact
- * This component wraps a ReactJS one, so that ReasonReact components can consume it
- * Typing the myBanner.js component's output as a `reactClass`.
-*/
-[@genFlow]
-[@bs.module]
-external myBanner : ReasonReact.reactClass = "./MyBanner";
+/* The @genFlow annotation is ignored if there's also a .rei file */
+[@genFlow] [@bs.module]
+external myBanner: ReasonReact.reactClass = "./MyBanner";
 
 [@bs.deriving abstract]
 type jsProps = {
   show: bool,
   message: string,
 };
 
-/** This is like declaring a normal ReasonReact component's `make` function, except the body is a the interop hook wrapJsForReason */
+/* The @genFlow annotation is ignored if there's also a .rei file */
 [@genFlow]
 let make = (~show, ~message, children) =>
   ReasonReact.wrapJsForReason(

reason-react-example/src/interop/MyBannerRe.rei

@@ -0,0 +1,17 @@
+[@genFlow] [@bs.module]
+external myBanner: ReasonReact.reactClass = "./MyBanner";
+
+[@bs.deriving abstract]
+type jsProps = {
+  show: bool,
+  message: string,
+};
+
+[@genFlow]
+let make:
+  (~show: bool, ~message: string, 'a) =>
+  ReasonReact.component(
+    ReasonReact.stateless,
+    ReasonReact.noRetainedProps,
+    ReasonReact.actionless,
+  );

src/GenFlowMain.re

@@ -113,8 +113,16 @@ let translateSignatureItem =
     |> CodeItem.combineTranslations
 
   | {Typedtree.sig_desc: Tsig_value(valueDescription), _} =>
-    valueDescription
-    |> CodeItem.translateSignatureValue(~language, ~propsTypeGen, ~moduleName)
+    if (valueDescription.val_prim != []) {
+      valueDescription |> CodeItem.translatePrimitive;
+    } else {
+      valueDescription
+      |> CodeItem.translateSignatureValue(
+           ~language,
+           ~propsTypeGen,
+           ~moduleName,
+         );
+    }
 
   | _ => {CodeItem.dependencies: [], CodeItem.codeItems: []}
   };