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|
;;; ob-ocaml.el --- Babel Functions for Ocaml -*- lexical-binding: t; -*-
;; Copyright (C) 2009-2025 Free Software Foundation, Inc.
;; Author: Eric Schulte
;; Keywords: literate programming, reproducible research
;; URL: https://orgmode.org
;; This file is part of GNU Emacs.
;; GNU Emacs is free software: you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; GNU Emacs is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with GNU Emacs. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;; Org-Babel support for evaluating ocaml source code. This one will
;; be sort of tricky because ocaml programs must be compiled before
;; they can be run, but ocaml code can also be run through an
;; interactive interpreter.
;;
;; For now lets only allow evaluation using the ocaml interpreter.
;;; Requirements:
;; - tuareg-mode :: https://elpa.nongnu.org/nongnu/tuareg.html
;;; Code:
(require 'org-macs)
(org-assert-version)
(require 'ob)
(require 'comint)
(require 'org-macs)
(declare-function tuareg-run-caml "ext:tuareg" ())
(declare-function tuareg-run-ocaml "ext:tuareg" ())
(declare-function tuareg-interactive-send-input "ext:tuareg" ())
(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("ocaml" . "ml"))
(defvar org-babel-default-header-args:ocaml '())
(defvar org-babel-ocaml-eoe-indicator "\"org-babel-ocaml-eoe\";;")
(defvar org-babel-ocaml-eoe-output "org-babel-ocaml-eoe")
(defcustom org-babel-ocaml-command "ocaml"
"Name of the command for executing Ocaml code."
:version "24.4"
:package-version '(Org . "8.0")
:group 'org-babel
:type 'string)
(defun org-babel-execute:ocaml (body params)
"Execute Ocaml BODY according to PARAMS."
(let* ((full-body (org-babel-expand-body:generic
body params
(org-babel-variable-assignments:ocaml params)))
(session (org-babel-prep-session:ocaml
(cdr (assq :session params)) params))
(raw (org-babel-comint-with-output
(session org-babel-ocaml-eoe-output nil full-body)
(insert
(concat
(org-babel-chomp full-body) ";;\n"
org-babel-ocaml-eoe-indicator))
(tuareg-interactive-send-input)))
(clean
(car (let ((re (regexp-quote org-babel-ocaml-eoe-output)) out)
(delq nil (mapcar (lambda (line)
(if out
(progn (setq out nil) line)
(when (string-match re line)
(progn (setq out t) nil))))
(mapcar #'org-trim (reverse raw)))))))
(raw (org-trim clean))
(result-params (cdr (assq :result-params params))))
(string-match
"\\(\\(.*\n\\)*\\)[^:\n]+ : \\([^=\n]+\\) =[[:space:]]+\\(\\(.\\|\n\\)+\\)$"
raw)
(let ((output (match-string 1 raw))
(type (match-string 3 raw))
(value (match-string 4 raw)))
(org-babel-reassemble-table
(org-babel-result-cond result-params
(cond
((member "verbatim" result-params) raw)
((member "output" result-params) output)
(t raw))
(if (and value type)
(org-babel-ocaml-parse-output value type)
raw))
(org-babel-pick-name
(cdr (assq :colname-names params)) (cdr (assq :colnames params)))
(org-babel-pick-name
(cdr (assq :rowname-names params)) (cdr (assq :rownames params)))))))
(defvar tuareg-interactive-buffer-name)
(defun org-babel-prep-session:ocaml (session _params)
"Prepare SESSION according to the header arguments in PARAMS."
(org-require-package 'tuareg)
(let ((tuareg-interactive-buffer-name (if (and (not (string= session "none"))
(not (string= session "default"))
(stringp session))
session
tuareg-interactive-buffer-name)))
(save-window-excursion (if (fboundp 'tuareg-run-process-if-needed)
(tuareg-run-process-if-needed org-babel-ocaml-command)
(tuareg-run-caml)))
(get-buffer tuareg-interactive-buffer-name)))
(defun org-babel-variable-assignments:ocaml (params)
"Return list of ocaml statements assigning the block's variables.
The variables are defined in PARAMS."
(mapcar
(lambda (pair) (format "let %s = %s;;" (car pair)
(org-babel-ocaml-elisp-to-ocaml (cdr pair))))
(org-babel--get-vars params)))
(defun org-babel-ocaml-elisp-to-ocaml (val)
"Return a string of ocaml code which evaluates to VAL."
(if (listp val)
(concat "[|" (mapconcat #'org-babel-ocaml-elisp-to-ocaml val "; ") "|]")
(format "%S" val)))
(defun org-babel-ocaml-parse-output (value type)
"Parse VALUE of type TYPE.
VALUE and TYPE are string output from an ocaml process."
(cond
((string= "string" type)
(org-babel-read value))
((or (string= "int" type)
(string= "float" type))
(string-to-number value))
((string-match "list" type)
(org-babel-ocaml-read-list value))
((string-match "array" type)
(org-babel-ocaml-read-array value))
(t (message "don't recognize type %s" type) value)))
(defun org-babel-ocaml-read-list (results)
"Convert RESULTS into an elisp table or string.
If the results look like a table, then convert them into an
Emacs-lisp table, otherwise return the results as a string."
;; XXX: This probably does not behave as expected when a semicolon
;; is in a string in a list. The same comment applies to
;; `org-babel-ocaml-read-array' below (with even more failure
;; modes).
(org-babel-script-escape (replace-regexp-in-string ";" "," results)))
(defun org-babel-ocaml-read-array (results)
"Convert RESULTS into an elisp table or string.
If the results look like a table, then convert them into an
Emacs-lisp table, otherwise return the results as a string."
(org-babel-script-escape
(replace-regexp-in-string
"\\[|" "[" (replace-regexp-in-string
"|\\]" "]" (replace-regexp-in-string
"; " "," results)))))
(provide 'ob-ocaml)
;;; ob-ocaml.el ends here
|
