mirror of
https://gitlab.com/scemama/QCaml.git
synced 2024-12-23 04:43:32 +01:00
98 lines
2.3 KiB
Org Mode
98 lines
2.3 KiB
Org Mode
#+begin_src elisp tangle: no :results none :exports none
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(setq pwd (file-name-directory buffer-file-name))
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(setq name (file-name-nondirectory (substring buffer-file-name 0 -4)))
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(setq lib (concat pwd "lib/"))
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(setq testdir (concat pwd "test/"))
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(setq mli (concat lib name ".mli"))
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(setq ml (concat lib name ".ml"))
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(setq test-ml (concat testdir name ".ml"))
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(org-babel-tangle)
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#+end_src
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* Range
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:PROPERTIES:
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:header-args: :noweb yes :comments both
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:END:
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A range is a sorted list of integers in an interval.
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- ~"[a-b]"~ : range between a and b (included)
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- ~"[a]"~ : the list with only one integer a
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- ~"a"~ : equivalent to "[a]"
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- ~"[36-53,72-107,126-131]"~ represents the list of integers
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[ 37 ; 37 ; 38 ; ... ; 52 ; 53 ; 72 ; 73 ; ... ; 106 ; 107 ; 126 ; 127 ; ... ; 130 ; 131 ].
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** Type
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<<<~Range.t~>>>
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#+begin_src ocaml :tangle (eval mli)
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type t
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#+end_src
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#+begin_src ocaml :tangle (eval ml) :exports none
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type t = int list
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#+end_src
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** Conversion
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#+begin_src ocaml :tangle (eval mli)
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val of_string : string -> t
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val to_string : t -> string
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val to_int_list : t -> int list
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#+end_src
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#+begin_src ocaml :tangle (eval ml) :exports none
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let to_int_list r = r
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let expand_range r =
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match String.split_on_char '-' r with
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| s :: f :: [] ->
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begin
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let start = int_of_string s
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and finish = int_of_string f
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in
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assert (start <= finish) ;
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let rec do_work = function
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| i when i=finish -> [ i ]
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| i -> i::(do_work (i+1))
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in do_work start
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end
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| r :: [] -> [int_of_string r]
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| [] -> []
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| _ -> invalid_arg "Only one range expected"
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let of_string s =
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match s.[0] with
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| '0' .. '9' -> [ int_of_string s ]
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| _ ->
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assert (s.[0] = '[') ;
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assert (s.[(String.length s)-1] = ']') ;
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let s = String.sub s 1 ((String.length s) - 2) in
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let l = String.split_on_char ',' s in
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let l = List.map expand_range l in
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List.concat l
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|> List.sort_uniq compare
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let to_string l =
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"[" ^
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(List.map string_of_int l
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|> String.concat ",") ^
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"]"
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#+end_src
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** Printers
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#+begin_src ocaml :tangle (eval mli)
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val pp : Format.formatter -> t -> unit
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#+end_src
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#+begin_src ocaml :tangle (eval ml) :exports none
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let pp ppf t =
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Format.fprintf ppf "@[%s@]" (to_string t)
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#+end_src
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