;;; ob-ocaml.el --- Babel Functions for Ocaml -*- lexical-binding: t; -*-
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;; Copyright (C) 2009-2018 Free Software Foundation, Inc.
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;; Author: Eric Schulte
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;; Keywords: literate programming, reproducible research
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;; Homepage: https://orgmode.org
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;; This file is part of GNU Emacs.
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;; GNU Emacs is free software: you can redistribute it and/or modify
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;; it under the terms of the GNU General Public License as published by
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;; the Free Software Foundation, either version 3 of the License, or
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;; (at your option) any later version.
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;; GNU Emacs is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;; You should have received a copy of the GNU General Public License
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;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating ocaml source code. This one will
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;; be sort of tricky because ocaml programs must be compiled before
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;; they can be run, but ocaml code can also be run through an
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;; interactive interpreter.
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;;
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;; For now lets only allow evaluation using the ocaml interpreter.
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;;; Requirements:
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;; - tuareg-mode :: http://www-rocq.inria.fr/~acohen/tuareg/
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;;; Code:
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(require 'ob)
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(require 'comint)
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(declare-function tuareg-run-caml "ext:tuareg" ())
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(declare-function tuareg-run-ocaml "ext:tuareg" ())
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(declare-function tuareg-interactive-send-input "ext:tuareg" ())
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(declare-function org-trim "org" (s &optional keep-lead))
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("ocaml" . "ml"))
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(defvar org-babel-default-header-args:ocaml '())
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(defvar org-babel-ocaml-eoe-indicator "\"org-babel-ocaml-eoe\";;")
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(defvar org-babel-ocaml-eoe-output "org-babel-ocaml-eoe")
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(defcustom org-babel-ocaml-command "ocaml"
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"Name of the command for executing Ocaml code."
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:version "24.4"
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:package-version '(Org . "8.0")
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:group 'org-babel
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:type 'string)
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(defun org-babel-execute:ocaml (body params)
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"Execute a block of Ocaml code with Babel."
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(let* ((full-body (org-babel-expand-body:generic
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body params
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(org-babel-variable-assignments:ocaml params)))
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(session (org-babel-prep-session:ocaml
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(cdr (assq :session params)) params))
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(raw (org-babel-comint-with-output
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(session org-babel-ocaml-eoe-output nil full-body)
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(insert
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(concat
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(org-babel-chomp full-body) ";;\n"
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org-babel-ocaml-eoe-indicator))
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(tuareg-interactive-send-input)))
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(clean
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(car (let ((re (regexp-quote org-babel-ocaml-eoe-output)) out)
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(delq nil (mapcar (lambda (line)
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(if out
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(progn (setq out nil) line)
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(when (string-match re line)
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(progn (setq out t) nil))))
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(mapcar #'org-trim (reverse raw)))))))
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(raw (org-trim clean))
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(result-params (cdr (assq :result-params params))))
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(string-match
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"\\(\\(.*\n\\)*\\)[^:\n]+ : \\([^=\n]+\\) =\\(\n\\| \\)\\(.+\\)$"
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raw)
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(let ((output (match-string 1 raw))
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(type (match-string 3 raw))
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(value (match-string 5 raw)))
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(org-babel-reassemble-table
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(org-babel-result-cond result-params
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(cond
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((member "verbatim" result-params) raw)
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((member "output" result-params) output)
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(t raw))
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(if (and value type)
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(org-babel-ocaml-parse-output value type)
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raw))
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(org-babel-pick-name
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(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
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(org-babel-pick-name
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(cdr (assq :rowname-names params)) (cdr (assq :rownames params)))))))
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(defvar tuareg-interactive-buffer-name)
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(defun org-babel-prep-session:ocaml (session _params)
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"Prepare SESSION according to the header arguments in PARAMS."
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(require 'tuareg)
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(let ((tuareg-interactive-buffer-name (if (and (not (string= session "none"))
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(not (string= session "default"))
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(stringp session))
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session
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tuareg-interactive-buffer-name)))
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(save-window-excursion (if (fboundp 'tuareg-run-process-if-needed)
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(tuareg-run-process-if-needed org-babel-ocaml-command)
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(tuareg-run-caml)))
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(get-buffer tuareg-interactive-buffer-name)))
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(defun org-babel-variable-assignments:ocaml (params)
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"Return list of ocaml statements assigning the block's variables."
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(mapcar
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(lambda (pair) (format "let %s = %s;;" (car pair)
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(org-babel-ocaml-elisp-to-ocaml (cdr pair))))
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(org-babel--get-vars params)))
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(defun org-babel-ocaml-elisp-to-ocaml (val)
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"Return a string of ocaml code which evaluates to VAL."
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(if (listp val)
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(concat "[|" (mapconcat #'org-babel-ocaml-elisp-to-ocaml val "; ") "|]")
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(format "%S" val)))
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(defun org-babel-ocaml-parse-output (value type)
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"Parse VALUE of type TYPE.
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VALUE and TYPE are string output from an ocaml process."
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(cond
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((string= "string" type)
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(org-babel-read value))
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((or (string= "int" type)
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(string= "float" type))
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(string-to-number value))
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((string-match "list" type)
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(org-babel-ocaml-read-list value))
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((string-match "array" type)
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(org-babel-ocaml-read-array value))
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(t (message "don't recognize type %s" type) value)))
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(defun org-babel-ocaml-read-list (results)
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"Convert RESULTS into an elisp table or string.
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If the results look like a table, then convert them into an
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Emacs-lisp table, otherwise return the results as a string."
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;; XXX: This probably does not behave as expected when a semicolon
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;; is in a string in a list. The same comment applies to
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;; `org-babel-ocaml-read-array' below (with even more failure
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;; modes).
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(org-babel-script-escape (replace-regexp-in-string ";" "," results)))
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(defun org-babel-ocaml-read-array (results)
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"Convert RESULTS into an elisp table or string.
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If the results look like a table, then convert them into an
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Emacs-lisp table, otherwise return the results as a string."
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(org-babel-script-escape
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(replace-regexp-in-string
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"\\[|" "[" (replace-regexp-in-string
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"|\\]" "]" (replace-regexp-in-string
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"; " "," results)))))
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(provide 'ob-ocaml)
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;;; ob-ocaml.el ends here
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