std.cfg: use-retval for container member functions (#4766)

Author: chrchr-github

cfg/std.cfg

@@ -6699,11 +6699,15 @@ The obsolete function 'gets' is called. With 'gets' you'll get a buffer overrun
       <not-uninit/>
     </arg>
   </function>
-  <function name="std::list::back,std::list::front,std::forward_list::front,std::queue::back,std::queue::front,std::vector::back,std::vector::front,std::array::front,std::array::back">
+  <function name="std::list::back,std::list::front,std::forward_list::front,std::queue::back,std::queue::front,std::vector::back,std::vector::front,std::array::front,std::array::back,std::string::front,std::string::back,std::wstring::front,std::wstring::back,std::string_view::front,std::string_view::back,std::wstring_view::front,std::wstring_view::back">
     <use-retval/>
     <noreturn>false</noreturn>
   </function>
-  <function name="std::vector::at">
+  <function name="std::list::begin,std::list::end,std::forward_list::begin,std::forward_list::end,std::queue::begin,std::queue::end,std::vector::begin,std::vector::end,std::array::begin,std::array::end,std::string::begin,std::string::end,std::wstring::begin,std::wstring::end,std::string_view::begin,std::string_view::end,std::wstring_view::begin,std::wstring_view::end">
+    <use-retval/>
+    <noreturn>false</noreturn>
+  </function>
+  <function name="std::vector::at,std::array::at,std::string::at,std::wstring::at,std::string_view::at,std::wstring_view::at">
     <use-retval/>
     <noreturn>false</noreturn>
     <arg nr="1">

test/cfg/std.cpp

@@ -4205,6 +4205,19 @@ void ignoredReturnValue_string_compare(std::string teststr, std::wstring testwst
     testwstr.compare(L"wtest");
 }
 
+// cppcheck-suppress constParameter
+void ignoredReturnValue_container_access(std::string& s, std::string_view& sv, std::vector<int>& v)
+{
+  // cppcheck-suppress ignoredReturnValue
+  s.begin();
+  // cppcheck-suppress ignoredReturnValue
+  v.end();
+  // cppcheck-suppress ignoredReturnValue
+  sv.front();
+  // cppcheck-suppress ignoredReturnValue
+  s.at(0);
+}
+
 void ignoredReturnValue_locale_global(const std::locale& loc)
 {
     // no ignoredReturnValue shall be shown for