---

yaml
---
r: 348838
b: refs/heads/master
c: f6226d9
h: refs/heads/master

Author: dan-zheng

[refs]

@@ -1,5 +1,5 @@
 ---
-refs/heads/master: 2035658c571be4c8db7d736431eea838d744b822
+refs/heads/master: f6226d926cfe650764a7a726e4ddf6fdbb230eba
 refs/heads/master-next: 203b3026584ecad859eb328b2e12490099409cd5
 refs/tags/osx-passed: b6b74147ef8a386f532cf9357a1bde006e552c54
 refs/tags/swift-2.2-SNAPSHOT-2015-12-01-a: 6bb18e013c2284f2b45f5f84f2df2887dc0f7dea

trunk/include/swift/Basic/LangOptions.h

@@ -325,6 +325,10 @@ namespace swift {
     /// set to true.
     bool ExperimentalDependenciesIncludeIntrafileOnes = false;
 
+    /// Whether to enable experimental differentiable programming features:
+    /// `@differentiable` declaration attribute, etc.
+    bool EnableExperimentalDifferentiableProgramming = false;
+
     /// Sets the target we are building for and updates platform conditions
     /// to match.
     ///

trunk/include/swift/Option/Options.td

@@ -424,6 +424,11 @@ def disable_bridging_pch : Flag<["-"], "disable-bridging-pch">,
   Flags<[HelpHidden]>,
   HelpText<"Disable automatic generation of bridging PCH files">;
 
+// Experimental feature options
+def enable_experimental_differentiable_programming : Flag<["-"], "enable-experimental-differentiable-programming">,
+  Flags<[FrontendOption]>,
+  HelpText<"Enable experimental differentiable programming features">;
+
 // Diagnostic control options
 def suppress_warnings : Flag<["-"], "suppress-warnings">,
   Flags<[FrontendOption]>,