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  1. /**
  2.  * @jsx JSX
  3.  * @flow
  4.  */
  5.  
  6. // This one for when there are no JSX attributes
  7. declare function JSX<
  8.   Children: $ReadOnlyArray<mixed>,
  9.   Elem,
  10.   C: (props: {}, children: Children) => Elem
  11. >(
  12.   component: C,
  13.   props: null,
  14.   ...children: Children
  15. ): Elem;
  16.  
  17. // This one for when there are JSX attributes.
  18. declare function JSX<
  19.   Children: $ReadOnlyArray<mixed>,
  20.   Elem,
  21.   Props: Object,
  22.   C: (props: Props, children: Children) => Elem
  23. >(
  24.   component: C,
  25.   props: Props,
  26.   ...children: Children
  27. ): Elem;
  28.  
  29. declare function AcceptsWhatever(props: {} | null, children: any): string;
  30. (<AcceptsWhatever />: number); // Error string ~> number
  31. (<AcceptsWhatever name="hi">Text</AcceptsWhatever>: number); // Error string ~> number
  32.  
  33. declare function ExpectsProps(props: { name: string }, children: any): string;
  34. (<ExpectsProps />); // Error - missing prop
  35. (<ExpectsProps name="hi">Text</ExpectsProps>: number); // Error string ~> number
  36.  
  37. declare function ExpectsChildrenTuple(props: any, children: [string]): string;
  38. (<ExpectsChildrenTuple />); // Error - mising child
  39. (<ExpectsChildrenTuple>Hi</ExpectsChildrenTuple>); // No error
  40. (<ExpectsChildrenTuple>{123}</ExpectsChildrenTuple>); // Error: number ~> string
  41. (<ExpectsChildrenTuple>Hi {"there"}</ExpectsChildrenTuple>); // Error: too many children
  42.  
  43. declare function ExpectsChildrenArray(props: any, children: Array<string>): string;
  44. (<ExpectsChildrenArray />); // No error - 0 children is fine
  45. (<ExpectsChildrenArray>Hi</ExpectsChildrenArray>); // No error - 1 child is fine
  46. (<ExpectsChildrenArray>{123}</ExpectsChildrenArray>); // Error: number ~> string
  47. (<ExpectsChildrenArray>Hi {"there"}</ExpectsChildrenArray>); // No error - 2 children is fine
  48.  
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