Address feedback on emergent language features

Author: MichaelRFairhurst

amendments.csv

@@ -2,7 +2,7 @@ language,standard,amendment,rule_id,supportable,implementation_category,implemen
 c,MISRA-C-2012,Amendment3,DIR-4-6,Yes,Expand,Yes,Easy
 c,MISRA-C-2012,Amendment3,DIR-4-9,Yes,Refine,No,Easy
 c,MISRA-C-2012,Amendment3,DIR-4-11,Yes,Refine,No,Import
-c,MISRA-C-2012,Amendment3,RULE-1-4,Yes,Replace,Yes,Easy
+c,MISRA-C-2012,Amendment3,RULE-1-4,Yes,Replace,No,Easy
 c,MISRA-C-2012,Amendment3,RULE-10-1,Yes,Replace,Yes,Easy
 c,MISRA-C-2012,Amendment3,RULE-10-3,Yes,Refine,Yes,Easy
 c,MISRA-C-2012,Amendment3,RULE-10-4,Yes,Refine,Yes,Import

change_notes/2024-12-12-lessen-emergent-language-feature-restrictions.md

@@ -0,0 +1,2 @@
+ - `RULE-1-4` -  `EmergentLanguageFeaturesUsed.ql`:
+   - Remove restrictions on `stdnoreturn.h`, `stdalign.h`.

cpp/common/src/codingstandards/cpp/Emergent.qll

@@ -12,4 +12,8 @@ module C11 {
       getBody() = "1"
     }
   }
+
+  class GenericMacro extends EmergentLanguageFeature, Macro {
+    GenericMacro() { getBody().indexOf("_Generic") = 0 }
+  }
 }