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23 lines
659 B
Racket
23 lines
659 B
Racket
#lang br/quicklang
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(define (read-syntax path port)
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(strip-bindings
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#`(module mod "lang.rkt"
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#,@(for*/list ([triangle-str (in-list (string-split (port->string port) "\n"))])
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`(triangle ,@(string-split triangle-str))))))
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(provide read-syntax)
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(define-macro (mb . TRIANGLES)
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#'(#%module-begin
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(length (filter valid-triangle? (list . TRIANGLES)))))
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(provide (rename-out [mb #%module-begin]))
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(define-macro (triangle A B C)
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#'(map string->number (list A B C)))
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(provide triangle)
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(define (valid-triangle? triangle)
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(match-define (list a b c) triangle)
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(and (> (+ a b) c)
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(> (+ b c) a)
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(> (+ a c) b))) |