[PATCH] D15421: [Feature] Add a builtin for indexing into parameter packs

[Richard Smith via cfe-commits]

rsmith accepted this revision.
rsmith added a comment.
This revision is now accepted and ready to land.

Sorry for the delay, this all LGTM. Do you need someone to commit it for you?


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Comment at: lib/Sema/SemaTemplate.cpp:2082-2085
@@ +2081,6 @@
+    // If the Index is out of bounds, the program is ill-formed.
+    //
+    // TODO:
+    // This is not actually mandated by the standard, of course, so does it
+    // have its place here?
+    TemplateArgument IndexArg = Converted[0], Ts = Converted[1];
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This is fine; we get to specify how our extensions work, so we can say that an `Index` that's out of bounds is ill-formed.


http://reviews.llvm.org/D15421