A15-4-4: Ignore results on uninstantiated templates

Author: lcartey

change_notes/2023-10-26-a15-4-4-noexcept.md

@@ -0,0 +1 @@
+ * `A15-4-4`: remove false positives reported on uninsantiated templates.

cpp/autosar/src/rules/A15-4-4/MissingNoExcept.ql

@@ -33,5 +33,7 @@ where
   // The function is defined in this database
   f.hasDefinition() and
   // This function is not an overriden call operator of a lambda expression
-  not exists(LambdaExpression lambda | lambda.getLambdaFunction() = f)
-select f, "Function " + f.getName() + " could be declared noexcept(true)."
+  not exists(LambdaExpression lambda | lambda.getLambdaFunction() = f) and
+  // Exclude results from uinstantiated templates
+  not f.isFromUninstantiatedTemplate(_)
+select f, "Function " + f.getQualifiedName() + " could be declared noexcept(true)."

cpp/autosar/test/rules/A15-4-4/test.cpp

@@ -30,4 +30,17 @@ class A {
 void lambda_example() noexcept {
   auto with_capture = [=]() {};
   auto empty_capture = []() {};
+}
+
+#include <utility>
+template <typename TypeA, typename TypeB>
+void swap_wrapper(TypeA lhs,
+                  TypeB rhs) noexcept(noexcept(std::swap(*lhs, *rhs))) {
+  std::swap(*lhs, *rhs);
+}
+
+void test_swap_wrapper() noexcept {
+  int a = 0;
+  int b = 1;
+  swap_wrapper(&a, &b);
 }