62 lines
2.0 KiB
Scheme
62 lines
2.0 KiB
Scheme
|
|
(library (ikarus.apropos)
|
|
(export apropos)
|
|
(import
|
|
(except (ikarus) apropos)
|
|
(only (psyntax library-manager) library-subst library-name))
|
|
|
|
(define (compose f g)
|
|
(lambda (x) (f (g x))))
|
|
|
|
(define (match-maker s1)
|
|
(let ([n1 (string-length s1)])
|
|
(lambda (s2)
|
|
(let ([m (fx- (string-length s2) n1)])
|
|
(let f ([i2 0])
|
|
(and (fx<=? i2 m)
|
|
(or (let g ([i1 0] [i2 i2])
|
|
(or (fx= i1 n1)
|
|
(and (char=? (string-ref s1 i1)
|
|
(string-ref s2 i2))
|
|
(g (fx+ i1 1) (fx+ i2 1)))))
|
|
(f (fx+ i2 1)))))))))
|
|
|
|
(define ($apropos-list name who)
|
|
(let ([name
|
|
(cond
|
|
[(string? name) name]
|
|
[(symbol? name) (symbol->string name)]
|
|
[else
|
|
(die who "not a string or symbol" name)])])
|
|
(define matcher
|
|
(compose (match-maker name)
|
|
(compose symbol->string car)))
|
|
(fold-right
|
|
(lambda (lib rest)
|
|
(define (symbol<? s1 s2)
|
|
(string<? (symbol->string s1) (symbol->string s2)))
|
|
(let ([ls (filter matcher (library-subst lib))])
|
|
(if (null? ls)
|
|
rest
|
|
(let ([ls (list-sort symbol<? (map car ls))])
|
|
(cons (cons (library-name lib) ls) rest)))))
|
|
'()
|
|
(list-sort
|
|
(lambda (lib1 lib2)
|
|
(let f ([ls1 (library-name lib1)] [ls2 (library-name lib2)])
|
|
(and (pair? ls2)
|
|
(or (null? ls1)
|
|
(let ([s1 (symbol->string (car ls1))]
|
|
[s2 (symbol->string (car ls2))])
|
|
(or (string<? s1 s2)
|
|
(and (string=? s1 s2)
|
|
(f (cdr ls1) (cdr ls2)))))))))
|
|
(installed-libraries)))))
|
|
|
|
(define (apropos name)
|
|
(for-each
|
|
(lambda (x) (printf "~a:\n ~a\n" (car x) (cdr x)))
|
|
($apropos-list name 'apropos))))
|
|
|
|
|