add tests

Author: ludviggunne

test/testunusedvar.cpp

@@ -80,6 +80,7 @@ class TestUnusedVar : public TestFixture {
         TEST_CASE(structmember32); // #14483
         TEST_CASE(structmember33);
         TEST_CASE(structmember34);
+        TEST_CASE(structmember35);
         TEST_CASE(structmember_macro);
         TEST_CASE(structmember_template_argument); // #13887 - do not report that member used in template argument is unused
         TEST_CASE(classmember);
@@ -2101,6 +2102,20 @@ class TestUnusedVar : public TestFixture {
         ASSERT_EQUALS("[test.cpp:2:24]: (style) struct member 'S::p' is never used. [unusedStructMember]\n", errout_str());
     }
 
+    void structmember35() {
+        checkStructMemberUsage("struct S { int i; };\n"
+                               "int f() { return g<S>(); }\n");
+        ASSERT_EQUALS("", errout_str());
+
+        checkStructMemberUsage("struct S { int i; };\n"
+                               "int f() { A<S> *a = nullptr; (void) a; }\n");
+        ASSERT_EQUALS("", errout_str());
+
+        checkStructMemberUsage("struct S { int i; };\n"
+                               "int f() { const std::vector<S> a {}; (void) a; }\n");
+        ASSERT_EQUALS("[test.cpp:1:16]: (style) struct member 'S::i' is never used. [unusedStructMember]\n", errout_str());
+    }
+
     void structmember_macro() {
         checkStructMemberUsageP("#define S(n) struct n { int a, b, c; };\n"
                                 "S(unused);\n");