Merge pull request #17589 from geoffw0/missing2

Rust: Repair rust/diagnostics/unextracted-elements

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

@@ -0,0 +1,24 @@
+/**
+ * @name Unextracted Elements
+ * @description List all elements that weren't extracted due to unimplemented features or parse errors.
+ * @id rust/diagnostics/unextracted-elements
+ */
+
+import rust
+
+/**
+ * Gets a string along the lines of " (x2)", corresponding to the number `i`.
+ * For `i = 1`, the result is the empty string.
+ */
+bindingset[i]
+string multipleString(int i) {
+  i = 1 and result = ""
+  or
+  i > 1 and result = " (x" + i.toString() + ")"
+}
+
+from string name, int c
+where c = strictcount(Unextracted e | e.toString() = name)
+// we don't have locations, so just list the number of each type of
+// `Unextracted` element.
+select name + multipleString(c)

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

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