23 lines
682 B
Racket
23 lines
682 B
Racket
#lang typed/syndicate
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(require rackunit/turnstile)
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(check-type (set 1 2 3)
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: (Set Int)
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-> (set 2 3 1))
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(check-type (set 1 "hello" 3)
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: (Set (U Int String))
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-> (set "hello" 3 1))
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(check-type (set-count (set 1 "hello" 3))
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: Int
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-> 3)
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(check-type (set-union (set 1 2 3) (set "hello" "world"))
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: (Set (U Int String))
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-> (set 1 2 3 "hello" "world"))
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(check-type (set-intersect (set 1 2 3) (set "hello" "world"))
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: (Set ⊥)
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-> (set))
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(check-type (set-intersect (set 1 "hello" 3) (set #t "world" #f "hello"))
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: (Set String)
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-> (set "hello"))
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