100 lines
2.7 KiB
Scheme
100 lines
2.7 KiB
Scheme
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(library (ikarus predicates)
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(export fixnum? flonum? bignum? number? complex? real? rational?
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integer? exact? eof-object? immediate? boolean? char?
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vector? string? procedure? null? pair? symbol? not
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eq? eqv?)
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(import
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(except (ikarus) fixnum? flonum? bignum? number? complex? real?
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rational? integer? exact? eof-object? immediate?
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boolean? char? vector? string? procedure? null?
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pair? symbol? not eq? eqv?)
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(rename (only (ikarus) fixnum? flonum? bignum? eof-object?
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immediate? boolean? char? vector? string? procedure?
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null? pair? symbol? eq?)
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(fixnum? sys:fixnum?)
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(flonum? sys:flonum?)
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(bignum? sys:bignum?)
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(eof-object? sys:eof-object?)
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(immediate? sys:immediate?)
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(boolean? sys:boolean?)
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(char? sys:char?)
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(vector? sys:vector?)
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(string? sys:string?)
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(procedure? sys:procedure?)
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(null? sys:null?)
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(pair? sys:pair?)
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(symbol? sys:symbol?)
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(eq? sys:eq?)))
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(define fixnum?
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(lambda (x) (sys:fixnum? x)))
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(define bignum?
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(lambda (x) (sys:bignum? x)))
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(define flonum?
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(lambda (x) (sys:flonum? x)))
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(define number?
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(lambda (x)
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(or (sys:fixnum? x)
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(sys:bignum? x)
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(sys:flonum? x))))
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(define complex?
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(lambda (x) (number? x)))
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(define real?
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(lambda (x) (number? x)))
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(define rational?
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(lambda (x)
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(cond
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[(sys:fixnum? x) #t]
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[(sys:bignum? x) #t]
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[(sys:flonum? x) #f]
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[else (error 'rational? "~s is not a number" x)])))
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(define integer?
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(lambda (x)
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(cond
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[(sys:fixnum? x) #t]
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[(sys:bignum? x) #t]
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[(sys:flonum? x) (error 'integer "dunno for ~s" x)]
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[else #f])))
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(define exact?
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(lambda (x)
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(cond
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[(sys:fixnum? x) #t]
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[(sys:bignum? x) #t]
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[(sys:flonum? x) #f]
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[else
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(error 'exact? "~s is not a number" x)])))
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(define eof-object? (lambda (x) (sys:eof-object? x)))
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(define immediate? (lambda (x) (sys:immediate? x)))
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(define boolean? (lambda (x) (sys:boolean? x)))
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(define char? (lambda (x) (sys:char? x)))
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(define vector? (lambda (x) (sys:vector? x)))
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(define string? (lambda (x) (sys:string? x)))
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(define procedure? (lambda (x) (sys:procedure? x)))
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(define null? (lambda (x) (sys:null? x)))
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(define pair? (lambda (x) (sys:pair? x)))
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(define symbol? (lambda (x) (sys:symbol? x)))
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(define not (lambda (x) (if x #f #t)))
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(define eq? (lambda (x y) (sys:eq? x y)))
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(define eqv?
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(lambda (x y)
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(or (sys:eq? x y)
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(and (number? x) (number? y) (= x y)))))
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)
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