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prettier Show nullable.js Source code

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  1. /* @flow */
  2.  
  3. function optionalNullable1(x: {y?: ?number}) {
  4.   if (x.y !== null && x.y !== undefined) {
  5.     x.y++;
  6.   }
  7. }
  8.  
  9. function optionalNullable2(x: {y?: ?number}) {
  10.   if (x.y !== undefined && x.y !== null) {
  11.     x.y++;
  12.   }
  13. }
  14.  
  15. function optionalNullable3(x: {y?: ?number}) {
  16.   if (!(x.y !== null && x.y !== undefined)) {
  17.     x.y++; // should error
  18.   }
  19. }
  20.  
  21. function optionalNullable4(x: {y?: ?number}) {
  22.   if (!(x.y !== undefined && x.y !== null)) {
  23.     x.y++; // should error
  24.   }
  25. }
  26.  
  27. function optionalNullable5(x: {y?: ?number}) {
  28.   if (x.y === null || x.y === undefined) {
  29.     x.y++; // should error
  30.   }
  31. }
  32.  
  33. function optionalNullable6(x: {y?: ?number}) {
  34.   if (x.y === undefined || x.y === null) {
  35.     x.y++; // should error
  36.   }
  37. }
  38.  
  39. function optionalNullable7(x: {y?: ?number}) {
  40.   if (!(x.y === null || x.y === undefined)) {
  41.     x.y++;
  42.   }
  43. }
  44.  
  45. function optionalNullable8(x: {y?: ?number}) {
  46.   if (!(x.y === undefined || x.y === null)) {
  47.     x.y++;
  48.   }
  49. }
  50.  
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