64 lines
2.5 KiB
Racket
64 lines
2.5 KiB
Racket
#lang typed/racket
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(require "../traversal.hl.rkt"
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"ck.rkt")
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(define-type Foo (Listof String))
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(define-fold f₁ t₁ Null String)
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(define-fold f₂ t₂ (Pairof Null Null) String)
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(define-fold f₃ t₃ String String)
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(define-fold f₄ t₄ (Pairof Null String) String)
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(define-fold f₅ t₅ (Listof Null) String)
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(define-fold f₆ t₆ (List Null (Pairof Null Null) Null) String)
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(define-fold f₇ t₇ (Listof String) String)
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(define-fold f₈ t₈ (List String Foo (Listof String)) String)
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(define (string->symbol+acc [x : String] [acc : Integer])
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(values (string->symbol x) (add1 acc)))
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(check-equal?-values: ((f₁ string? string->symbol+acc) '() 0)
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'() 0)
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(check-equal?-values: ((f₁ string? string->symbol+acc) '() 0)
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: (Values Null Integer)
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'() 0)
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(check-equal?-values: ((f₂ string? string->symbol+acc) '(() . ()) 0)
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: (Values (Pairof Null Null) Integer)
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'(() . ()) 0)
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(check-equal?-values: ((f₃ string? string->symbol+acc) "abc" 0)
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: (Values Symbol Integer)
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'abc 1)
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(check-equal?-values: ((f₄ string? string->symbol+acc) '(() . "def") 0)
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: (Values (Pairof Null Symbol) Integer)
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'(() . def) 1)
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(check-equal?-values: ((f₅ string? string->symbol+acc) '(() () () ()) 0)
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: (Values (Listof Null) Integer)
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'(() () () ()) 0)
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(check-equal?-values: ((f₅ string? string->symbol+acc) '(()) 0)
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: (Values (Listof Null) Integer)
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'(()) 0)
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(check-equal?-values: ((f₅ string? string->symbol+acc) '() 0)
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: (Values (Listof Null) Integer)
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'() 0)
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(check-equal?-values: ((f₆ string? string->symbol+acc) '(() (() . ()) ()) 0)
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: (Values (List Null (Pairof Null Null) Null) Integer)
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'(() (() . ()) ()) 0)
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(check-equal?-values: ((f₇ string? string->symbol+acc) '("abc" "def" "ghi") 0)
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: (Values (Listof Symbol) Integer)
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'(abc def ghi) 3)
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(check-equal?-values: ((f₈ string? string->symbol+acc) '("abc" ("def" "ghi")
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("jkl" "mno"))
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0)
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: (Values (List Symbol (Listof String) (Listof Symbol))
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Integer)
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'(abc ("def" "ghi") (jkl mno)) 3) |