Add parsing for class declarations

test/mjsunit/harmony/typesystem/class-declarations.js

+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Flags: --harmony-types
+
+
+load("test/mjsunit/harmony/typesystem/testgen.js");
+
+
+(function TestClassDeclarations() {
+  // Implements clause.
+  CheckValid("class C implements I {}");
+  CheckValid("class C implements I, J {}");
+  CheckValid("class C implements I<number>, J {}");
+  CheckValid("class C implements I, J<I, number> {}");
+  // Extends and implements clause.
+  CheckValid("class B {}; class C extends B implements I {}");
+  CheckValid("class B {}; class C extends B implements I, J {}");
+  CheckValid("class B {}; class C extends B implements I<number>, J {}");
+  CheckValid("class B {}; class C extends B implements I, J<I, number> {}");
+  // Type parametric
+  CheckValid("class C<A, B> {}");
+  CheckValid("class D {}; class C<A, B> extends D {}");
+  CheckValid("class D {}; class C<A, B> extends D implements A, I {}");
+  CheckValid("class C<A, B> implements I<A, B> {}");
+  // Invalid implements clause.
+  CheckInvalid("class C implements () {}");
+  CheckInvalid("class C implements number[] {}");
+  CheckInvalid("class C implements I<> {}");
+  // Invalid extends clause.
+  CheckInvalid("class B1 {}; class B2 {}; class C extends B1, B2 {}");
+  // Invalid type parametric
+  CheckInvalid("class C<> {}");
+})();
+
+(function TestClassMembers() {
+  // Test all possible valid members.
+  CheckValid("class C {" + "\n" +
+     // constructor
+  "  constructor (x: number, y: boolean) { this.x = x; this.y = y; }" + "\n" +
+     // variable members
+  "  x" + "\n" +
+  "  y: boolean" + "\n" +
+  "  z = 42" + "\n" +
+  "  w: number = 17" + "\n" +
+  "  'one': number" + "\n" +
+  "  '2': boolean" + "\n" +
+  "  3: string" + "\n" +
+  "  'four': number = 4" + "\n" +
+  "  '5': boolean = false" + "\n" +
+  "  6: string[] = [...['six', 'six', 'and', 'six']]" + "\n" +
+     // methods
+  "  f () : number { return 42; }" + "\n" +
+  "  f (a: number[]) : number { return a[0]; }" + "\n" +
+  "  f (a: number[], b: number) : number { return b || a[0]; }" + "\n" +
+     // getters
+  "  get p () : number { return 42; }" + "\n" +
+  "  get 'q' () : number { return 42; }" + "\n" +
+  "  get 42 () : number { return 42; }" + "\n" +
+     // setters
+  "  set p (x: number) {}" + "\n" +
+  "  set 'q' (x: number) {}" + "\n" +
+  "  set 42 (x : number) {}" + "\n" +
+     // index members
+  "  [x: string]" + "\n" +
+  "  [x: string] : number" + "\n" +
+  "  [x: number]" + "\n" +
+  "  [x: number] : boolean" + "\n" +
+  "}");
+  // Test all possible valid static members.
+  CheckValid("class C {" + "\n" +
+     // variable members
+  "  static x" + "\n" +
+  "  static y: boolean" + "\n" +
+  "  static z = 42" + "\n" +
+  "  static w: number = 17" + "\n" +
+  "  static 'one': number" + "\n" +
+  "  static '2': boolean" + "\n" +
+  "  static 3: string" + "\n" +
+  "  static 'four': number = 4" + "\n" +
+  "  static '5': boolean = false" + "\n" +
+  "  static 6: string[] = [...['six', 'six', 'and', 'six']]" + "\n" +
+     // methods
+  "  static f () : number { return 42; }" + "\n" +
+  "  static f (a: number[]) : number { return a[0]; }" + "\n" +
+  "  static f (a: number[], b: number) : number { return b || a[0]; }" + "\n" +
+     // getters
+  "  static get p () : number { return 42; }" + "\n" +
+  "  static get 'q' () : number { return 42; }" + "\n" +
+  "  static get 42 () : number { return 42; }" + "\n" +
+     // setters
+  "  static set p (x: number) {}" + "\n" +
+  "  static set 'q' (x: number) {}" + "\n" +
+  "  static set 42 (x : number) {}" + "\n" +
+  "}");
+  // Test invalid member variable declarations.
+  CheckInvalid("class C { x: () }");
+  CheckInvalid("class C { [42] }");
+  CheckInvalid("class C { [42]: number }");
+  // Test invalid index members.
+  CheckInvalid("class C { [x: any] }");
+  CheckInvalid("class C { [x: any] : any }");
+  CheckInvalid("class C { static [x: number] }");
+})();