more tests && fix the doc

Author: denzor200

clang-tools-extra/clang-tidy/misc/ShadowedNamespaceFunctionCheck.cpp

@@ -70,7 +70,7 @@ void ShadowedNamespaceFunctionCheck::check(
     return;
 
   // Generate warning message
-  std::string NamespaceName = ShadowedNamespace->getNameAsString();
+  std::string NamespaceName = ShadowedNamespace->getQualifiedNameAsString();
   auto Diag = diag(Func->getLocation(), 
                    "free function %0 shadows '%1::%2'")
               << Func->getDeclName() 

clang-tools-extra/docs/clang-tidy/checks/misc/shadowed-namespace-function.rst

@@ -43,4 +43,3 @@ Limitations
 - Does not warn about template functions
 - Does not warn about static functions or member functions
 - Does not warn about the ``main`` function
-- Only considers functions declared before the global definition

clang-tools-extra/test/clang-tidy/checkers/misc/shadowed-namespace-function-anonymous-namespace.cpp

@@ -0,0 +1,11 @@
+// RUN: %check_clang_tidy %s misc-shadowed-namespace-function %t
+
+namespace { void f1(); }
+namespace foo {
+  void f0();
+  void f1();
+}
+namespace {
+void f0() {}
+void f1() {}
+}

clang-tools-extra/test/clang-tidy/checkers/misc/shadowed-namespace-function-nested.cpp

@@ -0,0 +1,13 @@
+// RUN: %check_clang_tidy %s misc-shadowed-namespace-function %t
+
+void f1();
+namespace foo::foo2::foo3 {
+  void f0();
+  void f1();
+}
+void f0() {}
+// CHECK-MESSAGES: :[[@LINE-1]]:6: warning: free function 'f0' shadows 'foo::foo2::foo3::f0' [misc-shadowed-namespace-function]
+// CHECK-FIXES: void foo::foo2::foo3::f0() {}
+void f1() {}
+// CHECK-MESSAGES: :[[@LINE-1]]:6: warning: free function 'f1' shadows 'foo::foo2::foo3::f1' [misc-shadowed-namespace-function]
+// CHECK-MESSAGES-NOT: :[[@LINE-2]]:{{.*}}: note: FIX-IT applied suggested code changes

clang-tools-extra/test/clang-tidy/checkers/misc/shadowed-namespace-function-static.cpp

@@ -0,0 +1,9 @@
+// RUN: %check_clang_tidy %s misc-shadowed-namespace-function %t
+
+static void f1();
+namespace foo {
+  void f0();
+  void f1();
+}
+static void f0() {}
+static void f1() {}

clang-tools-extra/test/clang-tidy/checkers/misc/shadowed-namespace-function-template.cpp

@@ -0,0 +1,14 @@
+// RUN: %check_clang_tidy %s misc-shadowed-namespace-function %t
+
+template<typename T>
+void f1();
+namespace foo {
+  template<typename T>
+  void f0();
+  template<typename T>
+  void f1();
+}
+template<typename T>
+void f0() {}
+template<typename T>
+void f1() {}