2d4f3e2ac9
The layer is now redundant, since everything left in "pkgs" is in the "racket-pkgs" category.
70 lines
1.6 KiB
Racket
70 lines
1.6 KiB
Racket
#lang racket
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(require syntax/datum)
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(define (do-test expect got expr)
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(unless (equal? expect got) (error "failed\n" expr)))
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(define-syntax test
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(syntax-rules (datum-case datum)
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[(_ expect (datum-case expr () [pat (datum tmpl)]))
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(begin
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(test expect (values (datum-case expr () [pat (datum tmpl)])))
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(test expect (with-datum ([pat expr]) (datum tmpl))))]
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[(_ expect expr)
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(do-test expect expr 'expr)]))
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(test '(3 2 1)
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(datum-case '(1 2 3) ()
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[(a b c) (datum (c b a))]))
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(test '(3 1 2)
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(datum-case '(1 2 3) ()
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[(a ... c) (datum (c a ...))]))
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(test '(3 1 2)
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(datum-case '#(1 2 3) ()
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[#(a ... c) (datum (c a ...))]))
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(test '(3 2 1)
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(datum-case '#(1 2 3) ()
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[#(a b c) (datum (c b a))]))
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(test 5
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(datum-case '#&5 ()
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[#&x (datum x)]))
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(test '(3 2 1)
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(datum-case '#&(1 2 3) ()
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[#&(a b c) (datum (c b a))]))
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(test '(5)
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(datum-case '#&((((5)))) ()
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[#&((((x)))) (datum (x))]))
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(test '(3 2 1)
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(datum-case '#s(q 1 2 3) ()
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[#s(q a b c) (datum (c b a))]))
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(test '(3 2 1)
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(datum-case '(1 ! 2 % 3) (! %)
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[(a ! b % c) (datum (c b a))]))
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(test '(3 2 1)
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(datum-case '#(1 ! 2 % 3) (! %)
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[#(a ! b % c) (datum (c b a))]))
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(test 'x
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(datum x))
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(test 'x
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(quasidatum x))
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(test '(1 2 3)
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(quasidatum (1 (undatum (+ 1 1)) 3)))
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(test '#(1 2 3)
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(quasidatum #(1 (undatum (+ 1 1)) 3)))
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(test '(1 2 3)
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(quasidatum (1 (undatum-splicing (list (+ 1 1) 3)))))
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(test '(1 2 3 4)
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(quasidatum (1 (undatum-splicing (list (+ 1 1) 3)) 4)))
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