Rust: Add more test cases for comments.

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

@@ -1,3 +1,4 @@
+| comments.rs:0:0:0:0 | comments.rs | File successfully extracted. |
 | does_not_compile.rs:0:0:0:0 | does_not_compile.rs | File successfully extracted. |
 | error.rs:0:0:0:0 | error.rs | File successfully extracted. |
 | lib.rs:0:0:0:0 | lib.rs | File successfully extracted. |

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

@@ -1 +1 @@
-| 46 |
+| 68 |

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

@@ -1 +1 @@
-| 46 |
+| 68 |

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

@@ -1,6 +1,7 @@
+| comments.rs:0:0:0:0 | comments.rs | 20 |
 | my_struct.rs:0:0:0:0 | my_struct.rs | 20 |
-| main.rs:0:0:0:0 | main.rs | 7 |
+| main.rs:0:0:0:0 | main.rs | 8 |
+| lib.rs:0:0:0:0 | lib.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 extracted | 290 |
 | Elements unextracted | 0 |
-| Files extracted | 6 |
-| Lines of code extracted | 46 |
-| Lines of user code extracted | 46 |
+| Files extracted | 7 |
+| Lines of code extracted | 68 |
+| Lines of user code extracted | 68 |

rust/ql/test/query-tests/diagnostics/comments.rs

@@ -0,0 +1,60 @@
+/**
+ * total lines in this file: 61
+ * of which code: 16
+ * of which only comments: 33
+ * of which blank: 12
+ */
+
+// a comment
+
+/**
+ * Comment attached to a struct.
+ */
+struct StructWithComments
+{
+    /**
+     * Another attached comment.
+     */
+    a: i32,
+
+    // And another attached comment.
+    b: i32,
+
+    /*
+     * And yet another attached comment.
+     */
+    c: i32,
+
+    // informal
+    // comment
+    // block.
+    cd: i32,
+
+    // Just a comment.
+}
+
+pub fn my_simple_func()
+{
+}
+
+/**
+ * Comment attached to a function.
+ */
+pub fn my_func_with_comments()
+{
+    // comment
+    let a = 1; // comment
+    // comment
+    let b = 2;
+
+    // comment
+
+    /*
+     * Comment.
+     */
+    my_simple_func();
+}
+
+/**
+ * Comment.
+ */

rust/ql/test/query-tests/diagnostics/main.rs

@@ -1,16 +1,15 @@
 /**
  * total lines in this file: 18
- * of which code: 7
- * of which only comments: 7
+ * of which code: 8
+ * of which only comments: 6
  * of which blank: 4
  */
 
 mod my_struct;
 mod my_macro;
+mod comments;
 
-// another comment
-
-fn main() { // another comment
+fn main() {
     println!("Hello, world!");
 
     my_struct::my_func();