C++: Add up/downgrade scripts

cpp/ql/lib/upgrades/7e7c2f55670f8123d514cf542ccb1938118ac561/in_trap_or_tag.ql

@@ -0,0 +1,11 @@
+class Element extends @element {
+  string toString() { none() }
+}
+
+class Trap extends @trap {
+  string toString() { none() }
+}
+
+from Element e, Trap trap
+where in_trap(e, trap)
+select e, trap

cpp/ql/lib/upgrades/7e7c2f55670f8123d514cf542ccb1938118ac561/source_files.ql

@@ -0,0 +1,22 @@
+newtype TSourceFile = MkSourceFile(string name) { source_file_uses_trap(name, _) }
+
+module FreshSourceFile = QlBuiltins::NewEntity<TSourceFile>;
+
+class SourceFile extends FreshSourceFile::EntityId {
+  string toString() { none() }
+}
+
+class Trap extends @trap {
+  string toString() { none() }
+}
+
+query predicate mk_source_file_name(SourceFile source_file, string name) {
+  source_file = FreshSourceFile::map(MkSourceFile(name))
+}
+
+query predicate mk_source_file_uses_trap(SourceFile source_file, Trap trap) {
+  exists(string name |
+    source_file_uses_trap(name, trap) and
+    mk_source_file_name(source_file, name)
+  )
+}

cpp/ql/lib/upgrades/7e7c2f55670f8123d514cf542ccb1938118ac561/upgrade.properties

@@ -0,0 +1,6 @@
+description: Add source_file_name
+compatibility: backwards
+source_file_uses_trap.rel: run source_files.ql mk_source_file_uses_trap
+source_file_name.rel: run source_files.ql mk_source_file_name
+in_trap.rel: delete
+in_trap_or_tag.rel: run in_trap_or_tag.ql