Feat: add example/scope-module if possible

Author: ClausKlein

examples/CMakeLists.txt

@@ -2,6 +2,11 @@
 
 set(ALL_EXAMPLES scope_example unique_resource unique_resource-file)
 
+# module tests will only compile with gcc15 or clang20 and above
+if(CMAKE_CXX_SCAN_FOR_MODULES AND CMAKE_CXX_STANDARD GREATER 20)
+    list(APPEND ALL_EXAMPLES scope-module)
+endif()
+
 message("Examples to be built: ${ALL_EXAMPLES}")
 
 foreach(example ${ALL_EXAMPLES})

examples/scope-module.cpp

@@ -15,7 +15,12 @@
 // destroy noisy
 // scope exit: true success: true fail: false
 
+#ifdef HAS_MODULE_STD
 import std;
+#else
+#include <print>
+#endif
+
 import beman.scope;
 
 // clang-format off