[clang] [clang-tools-extra] [Clang] [C2y] Implement N3355 ‘NamedLoops’ (PR #152870)

[Aaron Ballman via cfe-commits]

================
@@ -10796,6 +10796,11 @@ def err_continue_not_in_loop : Error<
   "'continue' statement not in loop statement">;
 def err_break_not_in_loop_or_switch : Error<
   "'break' statement not in loop or switch statement">;
+def err_break_continue_label_not_found
+    : Error<"'%select{break|continue}0' label does not name an enclosing "
+            "%select{loop or 'switch'|loop}0">;
+def err_continue_switch
+    : Error<"label of 'continue' refers to a switch statement">;
----------------
AaronBallman wrote:

Similar formatting suggestions here as above.

https://github.com/llvm/llvm-project/pull/152870