support for D language code blocks in contrib
Thanks for Thierry Banel for contributing ob-D.
This commit is contained in:
Eric Schulte
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;;; ob-D.el --- org-babel functions for the D language
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;; Copyright (C) 2013 Thierry Banel
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;; Author: Thierry Banel, derived from the Eric Schulte work
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;; Keywords: literate programming, reproducible research
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;; This file is NOT (yet) part of GNU Emacs.
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;; ob-D.el 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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;; ob-D.el 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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;; the GNU General Public License can be obtained here:
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;; <http://www.gnu.org/licenses/>.
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;;; Commentary:
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;; Org-Babel support for evaluating Digital Mars D Language code.
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;; The D language home page is here:
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;; http://dlang.org/
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;;; Code:
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(require 'ob)
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(require 'ob-eval)
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(declare-function org-entry-get "org"
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(pom property &optional inherit literal-nil))
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(defvar org-babel-tangle-lang-exts)
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(add-to-list 'org-babel-tangle-lang-exts '("D" . "D"))
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(defvar org-babel-default-header-args:D '())
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(defvar org-babel-D-compiler "rdmd"
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"Command used to compile and run a D source code file into an
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executable.")
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(defun org-babel-execute:D (body params)
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"Execute a block of D code with org-babel. This function is
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called by `org-babel-execute-src-block'."
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(org-babel-D-execute body params))
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(defun org-babel-D-execute (body params)
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"This function should only be called by `org-babel-execute:D'"
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(let* ((tmp-src-file (org-babel-temp-file "Dsrc" ".d"))
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(cmdline (cdr (assoc :cmdline params)))
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(flags (cdr (assoc :flags params)))
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(rdmd (format "%s %s %s"
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org-babel-D-compiler
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(mapconcat 'identity
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(if (listp flags) flags (list flags)) " ")
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;; On Unix, keep directory separator
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(org-babel-process-file-name tmp-src-file)))
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(full-body (org-babel-D-expand body params)))
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(with-temp-file tmp-src-file (insert full-body))
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(org-babel-eval rdmd "")))
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(defun org-babel-D-expand (body params)
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"Expand a block of D code with org-babel according to
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its header arguments."
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(let ((vars (mapcar #'cdr (org-babel-get-header params :var)))
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(colname-names (cdr (car (org-babel-get-header params :colname-names))))
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(main-p (not (string= (cdr (assoc :main params)) "no")))
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(imports (mapcar #'cdr (org-babel-get-header params :import))))
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(mapconcat 'identity
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(list
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"module aaa;\n"
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;; imports
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(mapconcat
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(lambda (inc) (format "import %s;" inc))
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imports "\n")
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;; variables
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(mapconcat 'org-babel-D-var-to-D vars "\n")
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(mapconcat 'org-babel-D-colnames-to-D colname-names "\n")
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;; body
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(if main-p
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(org-babel-D-ensure-main-wrap body)
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body) "\n") "\n")))
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(defun org-babel-D-ensure-main-wrap (body)
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"Wrap body in a \"main\" function call if none exists."
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(if (string-match "^[ \t]*[intvod]+[ \t\n\r]*main[ \t]*(.*)" body)
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body
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(format "int main() {\n%s\nreturn(0);\n}\n" body)))
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(defun org-babel-prep-session:D (session params)
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"This function does nothing as D is a compiled language with no
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support for sessions"
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(error "D is a compiled languages -- no support for sessions"))
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(defun org-babel-load-session:D (session body params)
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"This function does nothing as D is a compiled language with no
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support for sessions"
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(error "D is a compiled languages -- no support for sessions"))
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;; helper functions
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(defun org-babel-D-var-to-D (pair)
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"Convert an elisp value into a string of D code specifying a variable
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of the same value."
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(let ((var (car pair))
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(val (cdr pair)))
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(when (symbolp val)
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(setq val (symbol-name val))
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(when (= (length val) 1)
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(setq val (string-to-char val))))
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(cond
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((integerp val)
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(format "int %S = %S;" var val))
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((floatp val)
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(format "double %S = %S;" var val))
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((stringp val)
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(format "string %S = \"%s\";" var val))
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((listp val)
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(if (assoc var colname-names) ()
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(setq colname-names
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(cons (cons
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var
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(let ((i 0)) (mapcar (lambda (x) (setq i (1+ i)) (format
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"$%s" i))
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(car val))))
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colname-names)))
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(format "string[][] %S = [\n[%s]];" var
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(mapconcat (lambda (row)
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(if (listp row)
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(mapconcat (lambda (v) (format "\"%s\"" v))
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row
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",")))
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val
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"],\n[")))
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(t
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(format "u32 %S = %S;" var val)))))
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(defun org-babel-D-colnames-to-D (pair)
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"Convert an elisp list of header table into a D vector
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specifying a variable with the name of the table"
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(let ((table (car pair))
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(headers (cdr pair)))
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(format "string[] %S_headers = [%s];"
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table
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(mapconcat (lambda (h) (format "%S" h)) headers ","))))
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(provide 'ob-D)
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;;; ob-D.el ends here
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