1 files changed, 19 insertions, 0 deletions
diff --git a/js/src/jsapi.h b/js/src/jsapi.h
index 1eecdbf749..63119cb288 100644
--- a/js/src/jsapi.h
+++ b/js/src/jsapi.h
@@ -2206,6 +2206,7 @@ class JS_PUBLIC_API(CompartmentCreationOptions)
         mergeable_(false),
         preserveJitCode_(false),
         cloneSingletons_(false),
+        experimentalNumberFormatFormatToPartsEnabled_(false),
         sharedMemoryAndAtomics_(false),
         secureContext_(false)
     {
@@ -2270,6 +2271,23 @@ class JS_PUBLIC_API(CompartmentCreationOptions)
         return *this;
     }
 
+    // ECMA-402 is considering adding a "formatToParts" NumberFormat method,
+    // that exposes not just a formatted string but its subcomponents.  The
+    // method, its semantics, and its name aren't finalized, so for now it's
+    // exposed *only* if requested.
+    //
+    // Until "formatToParts" is included in a final specification edition, it's
+    // subject to change or removal at any time.  Do *not* rely on it in
+    // mission-critical code that can't be changed if ECMA-402 decides not to
+    // accept the method in its current form.
+    bool experimentalNumberFormatFormatToPartsEnabled() const {
+        return experimentalNumberFormatFormatToPartsEnabled_;
+    }
+    CompartmentCreationOptions& setExperimentalNumberFormatFormatToPartsEnabled(bool flag) {
+        experimentalNumberFormatFormatToPartsEnabled_ = flag;
+        return *this;
+    }
+
     bool getSharedMemoryAndAtomicsEnabled() const;
     CompartmentCreationOptions& setSharedMemoryAndAtomicsEnabled(bool flag);
 
@@ -2294,6 +2312,7 @@ class JS_PUBLIC_API(CompartmentCreationOptions)
     bool mergeable_;
     bool preserveJitCode_;
     bool cloneSingletons_;
+    bool experimentalNumberFormatFormatToPartsEnabled_;
     bool sharedMemoryAndAtomics_;
     bool secureContext_;
 };