Fix #14764 FP uselessCallsRemove with brace init (cppcheck-opensource#8565)

Author: chrchr-github

lib/checkstl.cpp

@@ -2327,7 +2327,7 @@ void CheckStl::uselessCalls()
                        !tok->tokAt(4)->astParent() &&
                        tok->next()->variable() && tok->next()->variable()->isStlType(stl_containers_with_empty_and_clear))
                 uselessCallsEmptyError(tok->next());
-            else if (Token::Match(tok, "[{};] std :: remove|remove_if|unique (") && tok->tokAt(5)->nextArgument())
+            else if (Token::Match(tok, "[{};] std :: remove|remove_if|unique (") && tok->tokAt(5)->nextArgument() && !tok->tokAt(4)->astParent())
                 uselessCallsRemoveError(tok->next(), tok->strAt(3));
             else if (printPerformance && tok->valueType() && tok->valueType()->type == ValueType::CONTAINER) {
                 if (Token::Match(tok, "%var% = { %var% . begin ( ) ,") && tok->varId() == tok->tokAt(3)->varId())

test/teststl.cpp

@@ -4835,6 +4835,12 @@ class TestStl : public TestFixture {
                       "[test.cpp:3:5]: (warning) Return value of std::remove_if() ignored. Elements remain in container. [uselessCallsRemove]\n"
                       "[test.cpp:4:5]: (warning) Return value of std::unique() ignored. Elements remain in container. [uselessCallsRemove]\n", errout_str());
 
+        check("void f(std::string& s) {\n" // #14764
+              "    auto it{ std::remove(s.begin(), s.end(), 'a') };\n"
+              "    s.erase(it, s.end());\n"
+              "}");
+        ASSERT_EQUALS("", errout_str());
+
         // #4431 - fp
         check("bool f() {\n"
               "    return x ? true : (y.empty());\n"