Add a new -Wundefined-inline warning for inline functions which are used but not

defined. Fixes PR14993!


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@174158 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 57 insertions, 0 deletions

diff --git a/test/SemaCXX/undefined-inline.cpp b/test/SemaCXX/undefined-inline.cpp
new file mode 100644
index 0000000000..ad719ae03a
--- /dev/null
+++ b/test/SemaCXX/undefined-inline.cpp
@@ -0,0 +1,57 @@
+// RUN: %clang_cc1 -fsyntax-only -verify %s
+// PR14993
+
+namespace test1 {
+  inline void f();  // expected-warning{{inline function 'test1::f' is not defined}}
+  void test() { f(); }  // expected-note{{used here}}
+}
+
+namespace test2 {
+  inline int f();
+  void test() { (void)sizeof(f()); }
+}
+
+namespace test3 {
+  void f();  // expected-warning{{inline function 'test3::f' is not defined}}
+  inline void f();
+  void test() { f(); }  // expected-note{{used here}}
+}
+
+namespace test4 {
+  inline void error_on_zero(int);    // expected-warning{{inline function 'test4::error_on_zero' is not defined}}
+  inline void error_on_zero(char*) {}
+  void test() { error_on_zero(0); }  // expected-note{{used here}}
+}
+
+namespace test5 {
+  struct X { void f(); };
+  void test(X &x) { x.f(); }
+}
+
+namespace test6 {
+  struct X { inline void f(); };  // expected-warning{{inline function 'test6::X::f' is not defined}}
+  void test(X &x) { x.f(); }  // expected-note{{used here}}
+}
+
+namespace test7 {
+  void f();  // expected-warning{{inline function 'test7::f' is not defined}}
+  void test() { f(); } // no used-here note.
+  inline void f();
+}
+
+namespace test8 {
+  inline void foo() __attribute__((gnu_inline));
+  void test() { foo(); }
+}
+
+namespace test9 {
+  void foo();
+  void test() { foo(); }
+  inline void foo() __attribute__((gnu_inline));
+}
+
+namespace test10 {
+  inline void foo();
+  void test() { foo(); }
+  inline void foo() __attribute__((gnu_inline));
+}