c++: template class with static member

README.adoc

@@ -12984,6 +12984,7 @@ Programs under link:userland/cpp/[] are examples of https://en.wikipedia.org/wik
 * link:userland/cpp/hello.cpp[]
 * templates
 ** link:userland/cpp/template.cpp[]: basic example
+** link:userland/cpp/template_class_with_static_member.cpp[]: https://stackoverflow.com/questions/3229883/static-member-initialization-in-a-class-template
 ** link:userland/cpp/if_constexpr.cpp[]: C++17 `if constexpr`
 *** https://stackoverflow.com/questions/12160765/if-else-at-compile-time-in-c/54647315#54647315
 *** https://stackoverflow.com/questions/37617677/implementing-a-compile-time-static-if-logic-for-different-string-types-in-a-co

userland/cpp/template_class_with_static_member.cpp

@@ -0,0 +1,20 @@
+// https://cirosantilli.com/linux-kernel-module-cheat#cpp
+
+#include <cassert>
+
+template <class T>
+struct MyClass {
+    static int i;
+    MyClass() {
+        i++;
+    }
+};
+
+template <class T>
+int MyClass<T>::i = 0;
+
+int main() {
+    MyClass<int>();
+    MyClass<int>();
+    assert(MyClass<int>::i == 2);
+}