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 Forum index » Off-Topic Area » Programming
Vala and Genie programming
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Lobster
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PostPosted: Thu 12 Mar 2009, 08:41    Post subject:  Vala and Genie programming  
In my desperate and futile attempts to program
I have been exploring the vala/genie programming language
used in Woof

http://live.gnome.org/Genie

I have been able to compile some of Barrys examples
http://puppylinux.com/genie/

now this:

Code:
init
   a:array of string = {"abc", "def", "xyz"}
   for s in a
      print(s)


gives me

Quote:
# valac v5.gs
v5.c: In function '_main':
v5.c:34: error: stray '\' in program
v5.c:34:40: warning: missing terminating " character
v5.c:34: error: missing terminating " character
v5.c:34: error: 'n' undeclared (first use in this function)
v5.c:34: error: (Each undeclared identifier is reported only once
v5.c:34: error: for each function it appears in.)
v5.c:35: error: expected ')' before '_tmp2'
v5.c:37: error: expected ')' before '}' token
v5.c:37: error: expected ';' before '}' token
error: cc exited with status 256
Compilation failed: 1 error(s), 0 warning(s)
#


which is more errors then I can cope with . . . Confused
I am pretty sure it is something to do with the tab
ending the program (python does this too)
but can not solve it.

HELP!
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MU


Joined: 24 Aug 2005
Posts: 13647
Location: Karlsruhe, Germany
PostPosted: Thu 12 Mar 2009, 11:28    Post subject:  
be sure to use tabs, not spaces in the beginning of the lines.

I just copied your example via copy&paste in Opera to leafpad, and it compiles fine here (newyearspup02 with devx).


Mark
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MU


Joined: 24 Aug 2005
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PostPosted: Thu 12 Mar 2009, 11:31    Post subject:  
you also may compile:
valac -C v5.gs

This just creates v5.c and v5.h.
Pleae copy&paste them here.

Maybe the difference to mine show, what goes wrong for you.

Mark
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Lobster
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PostPosted: Thu 12 Mar 2009, 11:34    Post subject:  
Shocked

tried in leafpad
will have another go
- it is the space thing - yes
I am using 4.2 rc2
and a 64 bit processor
(and I am stupid)

v5.c

Code:
#include "v5.h"




static void _vala_array_free (gpointer array, gint array_length, GDestroyNotify destroy_func);



void _main (char** args, int args_length1) {
   char** _tmp1;
   gint a_size;
   gint a_length1;
   char** _tmp0;
   char** a;
   _tmp1 = NULL;
   _tmp0 = NULL;
   a = (_tmp1 = (_tmp0 = g_new0 (char*, 3 + 1), _tmp0[0] = g_strdup ("abc"), _tmp0[1] = g_strdup ("def"), _tmp0[2] = g_strdup ("xyz"), _tmp0), a_length1 = 3, a_size = a_length1, _tmp1);
   {
      char** s_collection;
      int s_collection_length1;
      int s_it;
      s_collection = a;
      s_collection_length1 = a_length1;
      for (s_it = 0; s_it < a_length1; s_it = s_it + 1) {
         const char* _tmp3;
         char* s;
         _tmp3 = NULL;
         s = (_tmp3 = s_collection[s_it], (_tmp3 == NULL) ? NULL : g_strdup (_tmp3));
         {
            char* _tmp2;
            _tmp2 = NULL;
            g_print (_tmp2 = g_strconcat (s, \n", NULL));
            _tmp2 = (g_free (_tmp2), NULL);
            s = (g_free (s), NULL);
         }
      }
   }
   a = (_vala_array_free (a, a_length1, (GDestroyNotify) g_free), NULL);
}


int main (int argc, char ** argv) {
   g_type_init ();
   _main (argv, argc);
   return 0;
}


static void _vala_array_free (gpointer array, gint array_length, GDestroyNotify destroy_func) {
   if ((array != NULL) && (destroy_func != NULL)) {
      int i;
      for (i = 0; i < array_length; i = i + 1) {
         if (((gpointer*) array)[i] != NULL) {
            destroy_func (((gpointer*) array)[i]);
         }
      }
   }
   g_free (array);
}


and v5.h

Code:
#ifndef __V5_H__
#define __V5_H__

#include <glib.h>
#include <glib-object.h>
#include <stdlib.h>
#include <string.h>

G_BEGIN_DECLS



void _main (char** args, int args_length1);


G_END_DECLS

#endif



Thanks Mark Smile
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MUguest

Joined: 09 Dec 2006
Posts: 73
PostPosted: Fri 13 Mar 2009, 05:53    Post subject:  
Lob,

I get the same error trying to compile it in WinowsXP, using 0.5.7.

At home in Puppy I had used 0.5.1:
http://distro.ibiblio.org/pub/linux/distributions/puppylinux/pet_packages-4/vala-0.5.1-i486.pet

The problem is the generated C code, line 34:


Code:
            g_print (_tmp2 = g_strconcat (s, \n", NULL));
should be:

Code:
            g_print (_tmp2 = g_strconcat (s, "\n", NULL));

So there missed a quotation mark.

Maybe with 0.5.1 you will have success.
Mark
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MUguest

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Posts: 73
PostPosted: Fri 13 Mar 2009, 06:12    Post subject:  
yes, with 0.5.1 the example compiles fine also in WinXP.
In 0.5.6 it does not.
So this is a bug in newer versions, or the syntax for the "for" loop changed.
Mark
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Lobster
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PostPosted: Fri 13 Mar 2009, 06:46    Post subject:  
Quote:
yes, with 0.5.1 the example compiles



Yep works for me too in 0.5.1
Thanks Mark Smile
Now to program my own masterpiece . . .
Embarassed
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Lobster
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PostPosted: Fri 13 Mar 2009, 07:08    Post subject:  
Confused stuck again

been looking for a list of reserved words
in particular functions . . .

Am trying to find and use a rnd or random function.
Any clues?
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MUguest

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PostPosted: Fri 13 Mar 2009, 09:29    Post subject:  
You can use the random method from GLib.
http://valadoc.org/?pkg=glib-2.0&element=GLib.Random


Example:
Code:
init

   // return a random value from 1 to 9
   a:int
   a = GLib.Random.int_range(1,10)
   print("%d" , a)
   




------------------------------------------
references

http://valadoc.org/?

http://www.vala-project.org/doc/vala/
http://live.gnome.org/Vala
http://live.gnome.org/Vala/Tutorial
http://library.gnome.org/devel/glib/

Mark
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MU


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Posts: 13647
Location: Karlsruhe, Germany
PostPosted: Sat 14 Mar 2009, 05:18    Post subject:  
I attach a pet made from the Archlinux package of the vala-IDE.
http://www.valaide.org/doku.php

It requires Gtksourceview:
http://dotpups.de/puppy3/dotpups/Libraries/Gnome-2.19.2-libs/other-Libs/gtksourceview-2.0.2-i486.pet

I did not try, if it works in Puppy.
I tested it in NYP 02rc7, that has updated Gtk libraries (based on Ultrapup).

The homepage says, it requires vala 0.5.7, but it seems to work fine with 0.5.1.

Mark
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Lobster
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PostPosted: Sat 14 Mar 2009, 05:49    Post subject:  
I could not get the random code to work - will try again later
Hey thanks for the IDE Smile that looks useful . . .
only . . .
this is what I got in Deep Thought 4.20 rc3
Code:
# ./valide
./valide: error while loading shared libraries: libgio-2.0.so.0: cannot open shared object file: No such file or directory
#

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muggins

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PostPosted: Sat 14 Mar 2009, 17:39    Post subject:  
libgio-2.0.so.0.pet
libselinux.so.1.pet
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Lobster
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PostPosted: Sat 14 Mar 2009, 23:54    Post subject:  
thanks Muggins Smile
now in rc3 of 4.2
added those pets and now getting . . .

Code:
# ./valide
./valide: symbol lookup error: /usr/lib/libvalide-0.0.so: undefined symbol: g_dgettext
#

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Lobster
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PostPosted: Sun 15 Mar 2009, 13:26    Post subject:  
Hey Mark,

Thanks for the random prog - got that working ok Smile

I am using it to train an infinite number of monkeys on virtual typewriters to write this (to start with)

Code:
while myLine != "in the"   


Soon (a few billion years) they will type out the Bible and the Complete Works of Shakespeare

. . . what am I missing?

Code:
// Infinite Monkey Theorem, Lobster and Shadow, March 2009
init
   myChars:array of string = {" ", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"}
   myLine:string = ""
   myCount:int = 6
   while myLine != "in the"
      for i:int = 1 to myCount
         myLine = myLine.concat(myChars[GLib.Random.int_range(0,myChars.length)])
      print(myLine)


rather than using a string array - is there not some sort of more efficient string pointer?
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Joined: 24 Aug 2005
Posts: 13647
Location: Karlsruhe, Germany
PostPosted: Sun 15 Mar 2009, 18:05    Post subject:  
Lobster, sorry no answer, but a request:
please do not edit your messages to add new content.
I just saw your monkey example by accident, when I looked up something in this thread.
That also had happened before, so that I replied very late.

The best is to add a new message, so that I can see it in my "View posts since last visit".

Mark
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