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Add sorting and don't collect result

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Tom Willemsen 2012-08-14 23:44:27 +02:00
parent d1bc934f9c
commit 50dc2da0b1
1 changed files with 41 additions and 16 deletions
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57
undone/main.scm
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@ -3,34 +3,59 @@
#:use-module (ice-9 rdelim) #:use-module (ice-9 rdelim)
#:export (main)) #:export (main))
(define-syntax get-field
(lambda (x)
(syntax-case x ()
((_ key alist)
#'(cdr (assq (quote key) alist))))))
(define-syntax define-view (define-syntax define-view
(lambda (x) (lambda (x)
(syntax-case x (where) (syntax-case x (where sort-by)
((_ name doc fmt fields fields* ... where predicate) ((_ name doc fmt fields fields* ...
where predicate
sort-by sort-predicate sort-field)
(with-syntax ((viewname (with-syntax ((viewname
(datum->syntax (datum->syntax
x (symbol-append (syntax->datum #'name) '-view)))) x (symbol-append (syntax->datum #'name) '-view))))
#`(begin #`(begin
(define (viewname) (define (viewname)
doc doc
(map (lambda (item) (for-each
(let (#,@(map (lambda (field) (lambda (item)
#`(#,field (cdr (assq (quote #,field) item)))) (let (#,@(map (lambda (field)
#'(fields fields* ...))) #`(#,field
(if predicate (cdr (assq (quote #,field) item))))
(format #t fmt #'(fields fields* ...)))
#,@(map (lambda (field) (if predicate
field) (format #t fmt
#'(fields fields* ...)))))) #,@(map (lambda (field)
todo-list)) field)
#'(fields fields* ...))))))
#,(if (syntax->datum #'sort-predicate)
#'(stable-sort
todo-list
(lambda (a b)
(sort-predicate (get-field sort-field a)
(get-field sort-field b))))
#'todo-list)))
(set! view-list (set! view-list
(append view-list (append view-list
(list (cons 'name viewname))))))) (list (cons 'name viewname)))))))
((_ name doc fmt fields fields* ...
sort-by sort-predicate sort-field)
#'(define-view name doc fmt fields fields* ...
where #t
sort-by sort-predicate sort-field))
((_ name doc fmt fields fields* ...
where predicate)
#'(define-view name doc fmt fields fields* ...
where predicate
sort-by #f nil))
((_ name doc fmt fields fields* ...) ((_ name doc fmt fields fields* ...)
(with-syntax ((viewname #'(define-view name doc fmt fields fields* ...
(datum->syntax where #t
x (symbol-append (syntax->datum #'name) '-view)))) sort-by #f nil)))))
#'(define-view name doc fmt fields fields* ... where #t))))))
(define todo-list-file "todo.scm") (define todo-list-file "todo.scm")