Swift: db upgrade/downgrade script

swift/downgrades/15d0da3a76b9dbffb921ae6d585f8a8de8945a0b/iterable_decl_context_members.ql

@@ -0,0 +1,17 @@
+class IterableDeclContext extends @decl {
+  IterableDeclContext() {
+    this instanceof @extension_decl
+    or
+    this instanceof @nominal_type_decl
+  }
+
+  string toString() { none() }
+}
+
+class DeclOrNone extends @decl_or_none {
+  string toString() { none() }
+}
+
+query predicate iterable_decl_context_members(IterableDeclContext id, int index, DeclOrNone member) {
+  decl_members(id, index, member)
+}

swift/downgrades/15d0da3a76b9dbffb921ae6d585f8a8de8945a0b/upgrade.properties

@@ -0,0 +1,5 @@
+description: revert removal of IterableDeclContext
+compatibility: partial
+
+iterable_decl_context_members.rel: run iterable_decl_context_members.qlo
+decl_members.rel: delete

swift/ql/lib/upgrades/98a78b66651ad4eb35a8edf1642767c794909ea4/decl_members.ql

@@ -0,0 +1,11 @@
+class Decl extends @decl {
+  string toString() { none() }
+}
+
+class DeclOrNone extends @decl_or_none {
+  string toString() { none() }
+}
+
+query predicate decl_members(Decl id, int index, DeclOrNone member) {
+  iterable_decl_context_members(id, index, member)
+}

swift/ql/lib/upgrades/98a78b66651ad4eb35a8edf1642767c794909ea4/upgrade.properties

@@ -0,0 +1,5 @@
+description: remove IterableDeclContext
+compatibility: full
+
+iterable_decl_context_members.rel: delete
+decl_members.rel: run decl_members.qlo