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;;; ob-io.el --- org-babel functions for Io evaluation
;; Copyright (C) 2012-2013 Free Software Foundation, Inc.
;; Author: Andrzej Lichnerowicz
;; Keywords: literate programming, reproducible research
;; Homepage: http://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 <http://www.gnu.org/licenses/>.
;;; Commentary:
;; Currently only supports the external execution. No session support yet.
;; :results output -- runs in scripting mode
;; :results output repl -- runs in repl mode
;;; Requirements:
;; - Io language :: http://iolanguage.org/
;; - Io major mode :: Can be installed from Io sources
;; https://github.com/stevedekorte/io/blob/master/extras/SyntaxHighlighters/Emacs/io-mode.el
;;; Code:
(require 'ob)
(require 'ob-ref)
(require 'ob-comint)
(require 'ob-eval)
(eval-when-compile (require 'cl))
(defvar org-babel-tangle-lang-exts) ;; Autoloaded
(add-to-list 'org-babel-tangle-lang-exts '("io" . "io"))
(defvar org-babel-default-header-args:io '())
(defvar org-babel-io-command "io"
"Name of the command to use for executing Io code.")
(defun org-babel-execute:io (body params)
"Execute a block of Io code with org-babel. This function is
called by `org-babel-execute-src-block'"
(message "executing Io source code block")
(let* ((processed-params (org-babel-process-params params))
(session (org-babel-io-initiate-session (nth 0 processed-params)))
(vars (nth 1 processed-params))
(result-params (nth 2 processed-params))
(result-type (cdr (assoc :result-type params)))
(full-body (org-babel-expand-body:generic
body params))
(result (org-babel-io-evaluate
session full-body result-type result-params)))
(org-babel-reassemble-table
result
(org-babel-pick-name
(cdr (assoc :colname-names params)) (cdr (assoc :colnames params)))
(org-babel-pick-name
(cdr (assoc :rowname-names params)) (cdr (assoc :rownames params))))))
(defun org-babel-io-table-or-string (results)
"Convert RESULTS into an appropriate elisp value.
If RESULTS look like a table, then convert them into an
Emacs-lisp table, otherwise return the results as a string."
(org-babel-script-escape results))
(defvar org-babel-io-wrapper-method
"(
%s
) asString print
")
(defun org-babel-io-evaluate (session body &optional result-type result-params)
"Evaluate BODY in external Io process.
If RESULT-TYPE equals 'output then return standard output as a string.
If RESULT-TYPE equals 'value then return the value of the last statement
in BODY as elisp."
(when session (error "Sessions are not (yet) supported for Io"))
(case result-type
(output
(if (member "repl" result-params)
(org-babel-eval org-babel-io-command body)
(let ((src-file (org-babel-temp-file "io-")))
(progn (with-temp-file src-file (insert body))
(org-babel-eval
(concat org-babel-io-command " " src-file) "")))))
(value (let* ((src-file (org-babel-temp-file "io-"))
(wrapper (format org-babel-io-wrapper-method body)))
(with-temp-file src-file (insert wrapper))
((lambda (raw)
(if (member "code" result-params)
raw
(org-babel-io-table-or-string raw)))
(org-babel-eval
(concat org-babel-io-command " " src-file) ""))))))
(defun org-babel-prep-session:io (session params)
"Prepare SESSION according to the header arguments specified in PARAMS."
(error "Sessions are not (yet) supported for Io"))
(defun org-babel-io-initiate-session (&optional session)
"If there is not a current inferior-process-buffer in SESSION
then create. Return the initialized session. Sessions are not
supported in Io."
nil)
(provide 'ob-io)
;;; ob-io.el ends here
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