Rust: For now exclude top-level AST elements from LOC counts. This is not ideal.

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

@@ -5,6 +5,7 @@ private import codeql.util.FileSystem
 private import codeql.rust.elements.SourceFile
 private import codeql.rust.elements.AstNode
 private import codeql.rust.elements.Comment
+private import codeql.rust.elements.internal.generated.ParentChild
 
 private module Input implements InputSig {
   abstract class ContainerBase extends @container {
@@ -47,6 +48,7 @@ class File extends Container, Impl::File {
         exists(AstNode node, Location loc |
           not node instanceof Comment and
           not node instanceof SourceFile and
+          not getImmediateParent(node) instanceof SourceFile and // ignore top-level elements for now as we're getting their locations wrong when a comment is attached
           loc = node.getLocation()
         |
           node.getFile() = this and

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

@@ -1 +1 @@
-| 49 |
+| 46 |

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

@@ -1 +1 @@
-| 49 |
+| 46 |

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

@@ -1,6 +1,6 @@
-| my_struct.rs:0:0:0:0 | my_struct.rs | 21 |
-| main.rs:0:0:0:0 | main.rs | 8 |
-| my_macro.rs:0:0:0:0 | my_macro.rs | 8 |
+| my_struct.rs:0:0:0:0 | my_struct.rs | 20 |
+| main.rs:0:0:0:0 | main.rs | 7 |
+| my_macro.rs:0:0:0:0 | my_macro.rs | 7 |
 | lib.rs:0:0:0:0 | lib.rs | 6 |
 | does_not_compile.rs:0:0:0:0 | does_not_compile.rs | 3 |
 | error.rs:0:0:0:0 | error.rs | 3 |

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

@@ -1,5 +1,5 @@
 | Elements extracted | 216 |
 | Elements unextracted | 0 |
 | Files extracted | 6 |
-| Lines of code extracted | 49 |
-| Lines of user code extracted | 49 |
+| Lines of code extracted | 46 |
+| Lines of user code extracted | 46 |