Fix #10977 FP noExplicitConstructor with variadic template (#4301)

lib/checkclass.cpp

@@ -377,9 +377,10 @@ void CheckClass::checkExplicitConstructors()
 
             if (!func.isExplicit() &&
                 func.argCount() > 0 && func.minArgCount() < 2 &&
-                func.argumentList.front().getTypeName() != "std::initializer_list" &&
                 func.type != Function::eCopyConstructor &&
-                func.type != Function::eMoveConstructor) {
+                func.type != Function::eMoveConstructor &&
+                !(func.templateDef && Token::simpleMatch(func.argumentList.front().typeEndToken(), "...")) &&
+                func.argumentList.front().getTypeName() != "std::initializer_list") {
                 noExplicitConstructorError(func.tokenDef, scope->className, scope->type == Scope::eStruct);
             }
         }

test/testclass.cpp

@@ -493,6 +493,22 @@ private:
                                   "    std::vector<int> v;\n"
                                   "};\n");
         ASSERT_EQUALS("", errout.str());
+
+        checkExplicitConstructors("template<class T>\n" // #10977
+                                  "struct A {\n"
+                                  "    template<class... Ts>\n"
+                                  "    A(Ts&&... ts) {}\n"
+                                  "};\n");
+        ASSERT_EQUALS("", errout.str());
+
+        checkExplicitConstructors("class Color {\n" // #7176
+                                  "public:\n"
+                                  "    Color(unsigned int rgba);\n"
+                                  "    Color(std::uint8_t r = 0, std::uint8_t g = 0, std::uint8_t b = 0, std::uint8_t a = 255);\n"
+                                  "};\n");
+        ASSERT_EQUALS("[test.cpp:3]: (style) Class 'Color' has a constructor with 1 argument that is not explicit.\n"
+                      "[test.cpp:4]: (style) Class 'Color' has a constructor with 1 argument that is not explicit.\n",
+                      errout.str());
     }
 
 #define checkDuplInheritedMembers(code) checkDuplInheritedMembers_(code, __FILE__, __LINE__)

test/testunusedvar.cpp

@@ -550,6 +550,21 @@ private:
             "    S s;\n"
             "}\n");
         ASSERT_EQUALS("", errout.str());
+
+        functionVariableUsage( // #11109
+            "class D { public: D(); };\n"
+            "class E { public: ~E(); };\n"
+            "class F {\n"
+            "public:\n"
+            "    F();\n"
+            "    ~F();\n"
+            "};\n"
+            "void f() {\n"
+            "    D d;\n"
+            "    E e;\n"
+            "    F f;\n"
+            "}\n");
+        ASSERT_EQUALS("", errout.str());
     }
 
     void cleanFunction() {