Rust: exclude Comment nodes from lines of code counts

Author: aibaars

rust/ql/lib/codeql/files/FileSystem.qll

@@ -4,6 +4,7 @@ private import codeql.Locations
 private import codeql.util.FileSystem
 private import codeql.rust.elements.SourceFile
 private import codeql.rust.elements.AstNode
+private import codeql.rust.elements.Comment
 
 private module Input implements InputSig {
   abstract class ContainerBase extends @container {
@@ -44,7 +45,9 @@ class File extends Container, Impl::File {
     result =
       count(int line |
         exists(AstNode node, Location loc |
-          not node instanceof SourceFile and loc = node.getLocation()
+          not node instanceof Comment and
+          not node instanceof SourceFile and
+          loc = node.getLocation()
         |
           node.getFile() = this and
           line = [loc.getStartLine(), loc.getEndLine()] and

rust/ql/test/query-tests/diagnostics/SummaryStats.expected

@@ -1,4 +1,4 @@
-| Elements extracted | 204 |
+| Elements extracted | 210 |
 | Elements unextracted | 0 |
 | Files extracted | 6 |
 | Lines of code extracted | 48 |