Implement C++ [basic.link]p8.

If a function or variable has a type with no linkage (and is not extern "C"),
any use of it requires a definition within the same translation unit; the idea
is that it is not possible to define the entity elsewhere, so any such use is
necessarily an error.

There is an exception, though: some types formally have no linkage but
nonetheless can be referenced from other translation units (for example, this
happens to anonymous structures defined within inline functions). For entities
with those types, we suppress the diagnostic except under -pedantic.

llvm-svn: 313729

1 files changed, 10 insertions, 6 deletions

diff --git a/clang/test/SemaCXX/warn-unreachable.cpp b/clang/test/SemaCXX/warn-unreachable.cpp
index b08467ab51e..08118147b75 100644
--- a/clang/test/SemaCXX/warn-unreachable.cpp
+++ b/clang/test/SemaCXX/warn-unreachable.cpp
@@ -49,22 +49,26 @@ void test3() {
       (halt()); // expected-warning {{will never be executed}}
 }
 
-void test4() {
+namespace Test4 {
   struct S {
     int mem;
   } s;
   S &foor();
-  halt(), foor()// expected-warning {{will never be executed}}
-    .mem;       
+  void test4() {
+    halt(), foor()// expected-warning {{will never be executed}}
+      .mem;       
+  }
 }
 
-void test5() {
+namespace Test5 {
   struct S {
     int mem;
   } s;
   S &foonr() __attribute__((noreturn));
-  foonr()
-    .mem;       // expected-warning {{will never be executed}}
+  void test5() {
+    foonr()
+      .mem;       // expected-warning {{will never be executed}}
+  }
 }
 
 void test6() {