Rust: Add unresolved macro calls diagnostic

rust/ql/src/queries/diagnostics/UnextractedElements.ql

@@ -1,6 +1,7 @@
 /**
  * @name Unextracted Elements
  * @description List all elements that weren't extracted due to unimplemented features or parse errors.
+ * @kind diagnostic
  * @id rust/diagnostics/unextracted-elements
  */
 

rust/ql/src/queries/diagnostics/UnresolvedMacroCalls.ql

@@ -0,0 +1,12 @@
+/**
+ * @name Unresolved Macro Calls
+ * @description List all macro calls that were not resolved to a target.
+ * @kind diagnostic
+ * @id rust/diagnostics/unresolved-macro-calls
+ */
+
+import rust
+
+from MacroCall mc
+where not mc.hasExpanded()
+select mc, "Macro call was not resolved to a target."

rust/ql/src/queries/summary/SummaryStats.ql

@@ -37,4 +37,10 @@ where
   key = "Inconsistencies - CFG" and value = getTotalCfgInconsistencies()
   or
   key = "Inconsistencies - data flow" and value = getTotalDataFlowInconsistencies()
-select key, value
+  or
+  key = "Macro calls - total" and value = count(MacroCall mc)
+  or
+  key = "Macro calls - resolved" and value = count(MacroCall mc | mc.hasExpanded())
+  or
+  key = "Macro calls - unresolved" and value = count(MacroCall mc | not mc.hasExpanded())
+select key, value order by key

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

@@ -5,3 +5,4 @@
 | does_not_compile.rs:2:26:2:25 | expected SEMICOLON | Extraction warning in does_not_compile.rs with message expected SEMICOLON | 1 |
 | does_not_compile.rs:2:32:2:31 | expected field name or number | Extraction warning in does_not_compile.rs with message expected field name or number | 1 |
 | error.rs:2:5:2:17 | An error! | Extraction warning in error.rs with message An error! | 1 |
+| my_macro.rs:17:9:17:27 | macro expansion failed: could not resolve macro 'myUndefinedMacro' | Extraction warning in my_macro.rs with message macro expansion failed: could not resolve macro 'myUndefinedMacro' | 1 |

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

@@ -1 +1 @@
-| 59 |
+| 60 |

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

@@ -1 +1 @@
-| 59 |
+| 60 |

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

@@ -1,7 +1,7 @@
 | my_struct.rs:0:0:0:0 | my_struct.rs | 20 |
 | comments.rs:0:0:0:0 | comments.rs | 13 |
 | main.rs:0:0:0:0 | main.rs | 8 |
-| my_macro.rs:0:0:0:0 | my_macro.rs | 7 |
+| my_macro.rs:0:0:0:0 | my_macro.rs | 8 |
 | lib.rs:0:0:0:0 | lib.rs | 5 |
 | 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

@@ -1,12 +1,15 @@
-| Elements extracted | 376 |
+| Elements extracted | 383 |
 | Elements unextracted | 0 |
 | Extraction errors | 0 |
-| Extraction warnings | 7 |
+| Extraction warnings | 8 |
 | Files extracted - total | 7 |
-| Files extracted - with errors | 2 |
-| Files extracted - without errors | 5 |
+| Files extracted - with errors | 3 |
+| Files extracted - without errors | 4 |
 | Inconsistencies - AST | 0 |
 | Inconsistencies - CFG | 0 |
 | Inconsistencies - data flow | 7 |
-| Lines of code extracted | 59 |
-| Lines of user code extracted | 59 |
+| Lines of code extracted | 60 |
+| Lines of user code extracted | 60 |
+| Macro calls - resolved | 8 |
+| Macro calls - total | 9 |
+| Macro calls - unresolved | 1 |

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

@@ -0,0 +1 @@
+| my_macro.rs:17:9:17:27 | MacroCall | Macro call was not resolved to a target. |

rust/ql/test/query-tests/diagnostics/UnresolvedMacroCalls.qlref

@@ -0,0 +1 @@
+queries/diagnostics/UnresolvedMacroCalls.ql

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

@@ -1,6 +1,6 @@
 /**
- * total lines in this file: 18
- * of which code: 10
+ * total lines in this file: 19
+ * of which code: 11
  * of which only comments: 6
  * of which blank: 2
  */
@@ -14,5 +14,6 @@ macro_rules! myMacro {
 pub fn my_func() {
     if true {
         myMacro!();
+        myUndefinedMacro!();
     }
 }