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55 lines
1.3 KiB
Org Mode
55 lines
1.3 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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* Non-negative float
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:PROPERTIES:
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:header-args: :noweb yes :comments both
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:END:
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** Type
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#+begin_src ocaml :tangle (eval mli)
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type t = private float
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#+end_src
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#+begin_src ocaml :tangle (eval ml) :exports none
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type t = float
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#+end_src
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** Conversions
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#+begin_src ocaml :tangle (eval mli)
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val of_float : float -> t
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val unsafe_of_float : float -> t
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val to_float : t -> float
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val of_string : string -> t
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val to_string : t -> string
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#+end_src
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The ~of_float~ function checks that the float is non-negative.
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The unsafe variant doesn't do this check.
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#+begin_src ocaml :tangle (eval ml) :exports none
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let of_float x =
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if x < 0. then invalid_arg (__FILE__^": of_float");
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x
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external to_float : t -> float = "%identity"
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external unsafe_of_float : float -> t = "%identity"
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let to_string x =
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let f = to_float x in string_of_float f
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let of_string x =
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let f = float_of_string x in of_float f
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#+end_src
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