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prettier Show test.js Source code

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  1. // @flow
  2.  
  3. // Classes
  4.  
  5. class C {
  6.   foo(): number { return 0; }
  7.   foo(): string { return "hello" } // last wins
  8.   x: number;
  9.   x: string; // last wins
  10.   bar(): number { return 0; }
  11.   bar: string; // field wins over method
  12.   qux: number;
  13.   qux(): string { return "hello" } // method loses to field!
  14. }
  15.  
  16. // check
  17.  
  18. ((new C).foo(): boolean); // last wins
  19. ((new C).x: boolean); // last wins
  20. ((new C).bar: boolean); // last wins
  21. ((new C).qux: boolean); // weird outlier where last doesn't win in classes
  22.  
  23. // Objects
  24.  
  25. const o = {
  26.   foo(): number { return 0; },
  27.   foo(): string { return "hello" }, // last wins
  28.   x: 42,
  29.   x: "hello", // last wins
  30.   bar(): number { return 0; },
  31.   bar: "hello", // last wins
  32.   qux: 42,
  33.   qux(): string { return "hello" }, // last wins
  34. };
  35.  
  36. // check
  37.  
  38. (o.foo(): boolean); // last wins
  39. (o.x: boolean); // last wins
  40. (o.bar: boolean); // last wins
  41. (o.qux(): boolean); // last wins
  42.  
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