[clang-tidy] Rename out-of-line function definitions (#91954)

Member function templates defined out-of-line were resulting in
conflicting naming failures with overlapping usage sets. With this
change, out-of-line definitions are treated as a usage of the failure
which is the inline declaration.

1 files changed, 30 insertions, 0 deletions

diff --git a/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming-outofline.cpp b/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming-outofline.cpp
new file mode 100644
index 0000000..f807875
--- /dev/null
+++ b/clang-tools-extra/test/clang-tidy/checkers/readability/identifier-naming-outofline.cpp
@@ -0,0 +1,30 @@
+// RUN: %check_clang_tidy %s readability-identifier-naming %t -std=c++20 \
+// RUN:   --config='{CheckOptions: { \
+// RUN:     readability-identifier-naming.MethodCase: CamelCase, \
+// RUN:  }}'
+
+namespace SomeNamespace {
+namespace Inner {
+
+class SomeClass {
+public:
+    template <typename T>
+    int someMethod();
+// CHECK-MESSAGES: :[[@LINE-1]]:9: warning: invalid case style for method 'someMethod' [readability-identifier-naming]
+// CHECK-FIXES: {{^}}    int SomeMethod();
+};
+template <typename T>
+int SomeClass::someMethod() {
+// CHECK-FIXES: {{^}}int SomeClass::SomeMethod() {
+    return 5;
+}
+
+} // namespace Inner
+
+void someFunc() {
+    Inner::SomeClass S;
+    S.someMethod<int>();
+// CHECK-FIXES: {{^}}    S.SomeMethod<int>();
+}
+
+} // namespace SomeNamespace