IdentifierHiding: Improve performance, address some false positives/false negatives

change_notes/2024-12-08-identifier-hiding.md

@@ -0,0 +1,7 @@
+ - `A2-10-1` - `IdentifierHiding.ql`:
+   - Improved evaluation performance.
+   - Addressed false negatives where nested loops used the same variable name.
+   - Exclude cases where a variable declared in a lambda expression shadowed a globa or namespace variable that did not appear in the same translation unit.
+ - `RULE-5-3` - `IdentifierHidingC.ql`:
+   - Improved evaluation performance.
+   - Addressed false negatives where nested loops used the same variable name.

cpp/cert/src/rules/DCL53-CPP/LocalConstructorInitializedObjectHidesIdentifier.ql

@@ -20,6 +20,6 @@ from UserVariable v, UserVariable hidden
 where
   not isExcluded(v, ScopePackage::localConstructorInitializedObjectHidesIdentifierQuery()) and
   v.getInitializer().getExpr() instanceof ConstructorCall and
-  hides(hidden, v)
+  hidesStrict(hidden, v)
 select v, "The declaration declares variable " + v.getName() + " that hides $@", hidden,
   hidden.getName()

cpp/cert/src/rules/DCL53-CPP/LocalFunctionDeclaration.ql

@@ -13,7 +13,6 @@
 
 import cpp
 import codingstandards.cpp.cert
-import codingstandards.cpp.Scope
 
 class LocalUserFunctionDeclarationEntry extends FunctionDeclarationEntry {
   DeclStmt ds;