17 lines
395 B
Scheme
17 lines
395 B
Scheme
(module graphics-unit mzscheme
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(require (lib "unit.ss")
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(lib "mred-sig.ss" "mred")
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"graphics-sig.ss"
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"graphics-posn-less-unit.ss")
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(provide graphics@)
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(define-unit p@
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(import)
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(export graphics:posn^)
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(define-struct posn (x y)))
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(define-compound-unit/infer graphics@
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(import mred^)
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(export graphics:posn^ graphics^)
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(link p@ graphics-posn-less@)))
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