A18-0-1: improve heuristic and test

Author: knewbury01

cpp/autosar/src/rules/A18-0-1/CLibraryFacilitiesNotAccessedThroughCPPLibraryHeaders.ql

@@ -33,8 +33,7 @@ where
       "assert.h", "ctype.h", "errno.h", "fenv.h", "float.h", "inttypes.h", "limits.h", "locale.h",
       "math.h", "setjmp.h", "signal.h", "stdarg.h", "stddef.h", "stdint.h", "stdio.h", "stdlib.h",
       "string.h", "time.h", "uchar.h", "wchar.h", "wctype.h"
-    ] and
-  not exists(i.getIncludedFile().getRelativePath())
+    ]
 select i,
   "C library \"" + filename + "\" is included instead of the corresponding C++ library <c" +
     filename.prefix(filename.length() - 2) + ">."

cpp/autosar/test/rules/A18-0-1/CLibraryFacilitiesNotAccessedThroughCPPLibraryHeaders.expected

@@ -19,3 +19,4 @@
 | test.cpp:19:1:19:18 | #include <uchar.h> | C library "uchar.h" is included instead of the corresponding C++ library <cuchar>. |
 | test.cpp:20:1:20:18 | #include <wchar.h> | C library "wchar.h" is included instead of the corresponding C++ library <cwchar>. |
 | test.cpp:21:1:21:19 | #include <wctype.h> | C library "wctype.h" is included instead of the corresponding C++ library <cwctype>. |
+| test.cpp:45:1:45:17 | #include "time.h" | C library "time.h" is included instead of the corresponding C++ library <ctime>. |

cpp/autosar/test/rules/A18-0-1/lib/assert.h renamed to cpp/autosar/test/rules/A18-0-1/lib/example.h

@@ -41,5 +41,5 @@
 #include <cwchar>    // COMPLIANT
 #include <cwctype>   // COMPLIANT
 
-#include "lib/assert.h" // COMPLIANT
-#include "time.h" // COMPLIANT - no way to check if this is a local checked in std lib copy
+#include "lib/example.h" // COMPLIANT
+#include "time.h"        // NON_COMPLIANT