migrations for Js_extern

Author: zth

packages/@rescript/runtime/Js_extern.res

@@ -1,7 +1,23 @@
+@deprecated({
+  reason: "Use `Nullable.isNullable` instead.",
+  migrate: Nullable.isNullable(),
+})
 external testAny: 'a => bool = "%is_nullable"
 
+@deprecated({
+  reason: "Use `Nullable.null` instead.",
+  migrate: Nullable.null,
+})
 external null: Primitive_js_extern.null<'a> = "%null"
 
+@deprecated({
+  reason: "Use `Nullable.undefined` instead.",
+  migrate: Nullable.undefined,
+})
 external undefined: Primitive_js_extern.null<'a> = "%undefined"
 
+@deprecated({
+  reason: "Use `Type.typeof` instead.",
+  migrate: Type.typeof(),
+})
 external typeof: 'a => string = "%typeof"

tests/tools_tests/src/expected/StdlibMigration_Extern.res.expected

@@ -0,0 +1,7 @@
+// Exercise migrations from Js_extern to new Stdlib APIs
+
+let isNullish = Nullable.isNullable(%raw("null"))
+let n = Nullable.null
+let u = Nullable.undefined
+let ty = Type.typeof("hello")
+

tests/tools_tests/src/migrate/StdlibMigration_Extern.res

@@ -0,0 +1,6 @@
+// Exercise migrations from Js_extern to new Stdlib APIs
+
+let isNullish = Js_extern.testAny(%raw("null"))
+let n = Js_extern.null
+let u = Js_extern.undefined
+let ty = Js_extern.typeof("hello")

tests/tools_tests/src/migrate/migrated/Migrated_StdlibMigration_Extern.res

@@ -0,0 +1,8 @@
+// This file is autogenerated so it can be type checked.
+// It's the migrated version of src/migrate/StdlibMigration_Extern.res.
+// Exercise migrations from Js_extern to new Stdlib APIs
+
+let isNullish = Nullable.isNullable(%raw("null"))
+let n = Nullable.null
+let u = Nullable.undefined
+let ty = Type.typeof("hello")