#+TITLE: ob-csharp

* Code 

org-babel funtions for C# evaluation based on Eric Schulte's ob-java.el -- don't blame Eric for any harm this might cause, he has /nothing/ to do with ob-csharp.el!  

#+BEGIN_SRC emacs-lisp :tangle src/ob-csharp.el
;;; ob-csharp.el --- org-babel functions for csharp evaluation

;; Copyright (C) 2011-2015 Free Software Foundation, Inc.

;; Original Author: Eric Schulte (ob-java.el) 
;; Author: thomas "at" friendlyvillagers.com 
;; Keywords: literate programming, reproducible research
;; Homepage: http://orgmode.org

;; This file is NOT YET 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 this only supports the external compilation and execution
;; of csharp code blocks (i.e., no session support).

;;; Code:
(require 'ob)

(defvar org-babel-tangle-lang-exts)
(add-to-list 'org-babel-tangle-lang-exts '("csharp" . "cs"))

(defcustom org-babel-csharp-command "mono"
  "Name of the csharp command.
May be either a command in the path, like mono
or an absolute path name, like /usr/local/bin/mono
parameters may be used, like mono -verbose"
  :group 'org-babel
  :version "24.3"
  :type 'string)

(defcustom org-babel-csharp-compiler "gmcs"
  "Name of the csharp compiler.
May be either a command in the path, like mcs
or an absolute path name, like /usr/local/bin/mcs
parameters may be used, like mcs -warnaserror+"
  :group 'org-babel
  :version "24.3"
  :type 'string) 


(defun org-babel-execute:csharp (body params)
  (let* ((full-body (org-babel-expand-body:generic body params))
	 (cmpflag (or (cdr (assoc :cmpflag params)) ""))
	 (cmdline (or (cdr (assoc :cmdline params)) ""))
	 (src-file (org-babel-temp-file "csharp-src-" ".cs"))
	 (exe-file (concat (file-name-sans-extension src-file)  ".exe"))
	 (compile 
	  (progn (with-temp-file  src-file (insert full-body))
		 (org-babel-eval 
		  (concat org-babel-csharp-compiler " " cmpflag " "  src-file) ""))))
    (let ((results (org-babel-eval (concat org-babel-csharp-command " " cmdline " " exe-file) "")))
      (org-babel-reassemble-table
       (org-babel-result-cond (cdr (assoc :result-params params))
	 (org-babel-read results)
         (let ((tmp-file (org-babel-temp-file "c-")))
           (with-temp-file tmp-file (insert results))
           (org-babel-import-elisp-from-file tmp-file)))
       (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-prep-session:csharp (session params)
  "Return an error because csharp does not support sessions."
  (error "Sessions are not (yet) supported for CSharp"))


(provide 'ob-csharp)
;;; ob-csharp.el ends here
#+END_SRC

Put this file into your orgmode-folder (i. e. ~.emacs.d/elpa/org-20XXXXXX~). 

In your ~.emacs~-file add csharp to the list of babel languages, i. e.: 

: (org-babel-do-load-languages 'org-babel-load-languages '((csharp . t)))


* Tests 

** Hello World 

#+BEGIN_SRC csharp :results verbatim :exports both
class HelloWorld {
  public static void Main()
  {
    System.Console.WriteLine("Hello World!");
  }
}
#+END_SRC

#+RESULTS:
: Hello World!

** Tables 

#+BEGIN_SRC csharp :exports both 
class Table {
  public static void Main()
  {
    for (char  c = 'a'; c < 'd'; c++)
      System.Console.Write("{0} ",c);
    System.Console.WriteLine();
    for (int i = 0; i < 3; i++)
      System.Console.Write("{0} ",i);
  }
}
#+END_SRC

#+RESULTS:
| a | b | c |
| 0 | 1 | 2 |

** Compiler flags and command line args 

#+BEGIN_SRC csharp :cmpflag -warnaserror+ 
public class TestFlags {
  public static void Main()
  {
   int i;  // unused; throw compile time error
   System.Console.WriteLine("You won't see this!");
  }
}
#+END_SRC

#+RESULTS:

#+BEGIN_SRC csharp :results verbatim  :cmdline --version :exports both
public class TestCmd {
  public static void Main()
  {
   System.Console.WriteLine("You won't see this!");
  }
}
#+END_SRC

#+RESULTS:
#+begin_example
Mono JIT compiler version 3.2.8 (Debian 3.2.8+dfsg-10)
Copyright (C) 2002-2014 Novell, Inc, Xamarin Inc and Contributors. www.mono-project.com
	TLS:           __thread
	SIGSEGV:       altstack
	Notifications: epoll
	Architecture:  amd64
	Disabled:      none
	Misc:          softdebug 
	LLVM:          supported, not enabled.
	GC:            sgen
#+end_example

#+BEGIN_SRC csharp :cmpflag -pkg:dotnet 
public class TestForms {
  public static void Main()
  {
    System.Windows.Forms.MessageBox.Show("Hello Messagebox", "Hello"); 
  }
}
#+END_SRC

#+RESULTS: