add error for decorators not being implemented yet

packages/babel-plugin-transform-decorators/src/index.js

@@ -70,12 +70,18 @@ export default function ({ types: t }) {
     return false;
   }
 
+  function doError(path) {
+    throw path.buildCodeFrameError("Decorators are not supported yet in 6.x pending proposal update.");
+  }
+
   return {
     inherits: require("babel-plugin-syntax-decorators"),
 
     visitor: {
       ClassExpression(path) {
         if (!hasDecorators(path)) return;
+        doError(path);
+
         explodeClass(path);
 
         let ref = path.scope.generateDeclaredUidIdentifier("ref");
@@ -92,6 +98,7 @@ export default function ({ types: t }) {
 
       ClassDeclaration(path) {
         if (!hasDecorators(path)) return;
+        doError(path);
         explodeClass(path);
 
         let ref = path.node.id;
@@ -105,6 +112,7 @@ export default function ({ types: t }) {
 
       ObjectExpression(path) {
         if (!hasDecorators(path)) return;
+        doError(path);
       }
     }
   };

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/class-decorator.js

@@ -1,18 +0,0 @@
-function noop() {}
-
-function override() {
-  return "bar";
-}
-
-@override
-class Foo {}
-
-@noop
-class Bar {
-  constructor() {
-    this.foo = "bar";
-  }
-}
-
-assert.equal(Foo, "bar");
-assert.equal(new Bar().foo, "bar");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/getters.js

@@ -1,23 +0,0 @@
-class Person {
-  @reader _first;
-  @reader last;
-
-  constructor(first, last) {
-    this._first = first;
-    this._last = last;
-  }
-
-  @reader get _fullName() {
-    return `${this._first} ${this._last}`;
-  }
-}
-
-let jason = new Person("Jason", "Orendorff");
-
-assert.equal(jason.first, "Jason");
-assert.equal(jason.last, "Orendorff");
-assert.equal(jason.fullName, "Jason Orendorff");
-
-jason.update("JSON", "Orendorff")
-assert.equal(jason.first, "JSON");
-assert.equal(jason.fullName, "JSON Orendorff");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/initialised-property-declarations.js

@@ -1,8 +0,0 @@
-class Person {
-  @reader _first = "Andreas";
-  @reader _last = "Rossberg";
-}
-
-let andreas = new Person();
-assert.equal(andreas.first, "Andreas");
-assert.equal(andreas.last, "Rossberg");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/initialised-static-properties.js

@@ -1,8 +0,0 @@
-class Person {
-  @reader static _first = "Brendan";
-  @reader static _last = "Eich";
-}
-
-let brendan = Person;
-assert.equal(brendan.first, "Brendan");
-assert.equal(brendan.last, "Eich");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/initialized-properties-in-object-literals.js

@@ -1,7 +0,0 @@
-let person = {
-  @reader _first: "Mark",
-  @reader _last: "Miller"
-};
-
-assert.equal(person.first, "Mark");
-assert.equal(person.last, "Miller");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/methods.js

@@ -1,33 +0,0 @@
-function reader(target, descriptor) {
-  let { enumerable, configurable, property: { name, get }, hint } = descriptor;
-  let publicName = extractPublicName(name());
-  Object.defineProperty(target, publicName, {
-    enumerable, configurable, get: function() { return get(this, name); }
-  });
-  return descriptor;
-}
-
-function extractPublicName(name) {
-  // _first -> first
-  return name.slice(1);
-}
-
-class Person {
-  @reader _first;
-  @reader _last;
-
-  constructor(first, last) {
-    this._first = first;
-    this._last = last;
-  }
-
-  @reader _update(first, last) {
-    this._first = first;
-    this._last = last;
-  }
-}
-
-let alex = new Person("Alex", "Russell");
-assert.equal(alex.first, "Alex");
-alex.update("Alexander", "Russell");
-assert.equal(alex.first, "Alexander");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/uninitialized-field-declaration.js

@@ -1,17 +0,0 @@
-class Person {
-  @reader _first;
-  @reader _last;
-
-  constructor(first="Waldemar", last="Horwat") {
-    this._first = first;
-    this._last = last;
-  }
-}
-
-let waldemar = new Person();
-assert.equal(waldemar.first, "Waldemar");
-assert.equal(waldemar.last, "Horwat");
-
-let jeff = new Person("Jeff", "Morrison");
-assert.equal(jeff.first, "Jeff");
-assert.equal(jeff.last, "Morrison");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/uninitialized-properties-in-object-literals.js

@@ -1,11 +0,0 @@
-let person = {
-  @reader _first,
-  @reader _last
-};
-
-assert.equal(person.first, "undefined");
-
-Object.assign(person, { _first: "Brian", _last: "Terlson" });
-
-assert.equal(person.first, "Brian");
-assert.equal(person.last, "Terlson");

packages/babel-plugin-transform-decorators/test/fixtures/.decorators/unitialised-static-properties.js

@@ -1,13 +0,0 @@
-class Person {
-  @reader static _first;
-  @reader static _last;
-}
-
-let jonathan = Person;
-
-assert.equal(jonathan.first, undefined);
-
-Object.assign(jonathan, { _first: "Jonathan", _last: "Turner" });
-
-assert.equal(jonathan.first, "Jonathan");
-assert.equal(jonathan.last, "Turner");