Add debug logging for name resolution failures

Author: cirras

CHANGELOG.md

@@ -10,6 +10,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Added
 
 - Support for MSBuild item and item metadata expressions in project files.
+- Debug logging for name resolution failures (enabled with `sonar-scanner -X`).
 - `ExhaustiveEnumCase` analysis rule, which flags `case` statements that do not handle all values in an enumeration.
 - `IterationPastHighBound` analysis rule, which flags `for` loops that iterate past the end of the collection.
 - `ExplicitBitwiseNot` analysis rule, which flags potentially incorrect bitwise `not` operations.

delphi-frontend/src/main/java/au/com/integradev/delphi/symbol/resolve/NameResolver.java

@@ -593,6 +593,15 @@ private void readNameReference(NameReferenceNode node, boolean inAttribute) {
         if (couldBeUnitNameReference) {
           readPossibleUnitNameReference(node, inAttribute);
         }
+        if (LOG.isDebugEnabled() && nameResolutionFailed()) {
+          IdentifierNode identifier = reference.getIdentifier();
+          LOG.debug(
+              "Name resolution failed on symbol '{}' ({} line {}:{})",
+              identifier.getImage(),
+              identifier.getUnitName(),
+              identifier.getBeginLine(),
+              identifier.getBeginColumn());
+        }
         return;
       }