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- Subject: Damned be the Innovator for C bites back
- From: Jeffrey Drake <wackysteak@...>
- Date: Wed, 23 Jun 2004 00:41:02 -0400
I am trying to do something with a metatable, but it is biting me. I have setup a number of helper functions, and an error maybe present there.
Here is what I am trying to ultimately do:
table A's metatable:
__newindex <-- for 'caption' would call setcaption
__index <-- for 'caption' would call getcaption
This is basically a property implementation.
Everything relevant would be here:
http://www.common-lisp.net/paste/display/1444 <-- Utility.c - helper functions
http://www.common-lisp.net/paste/display/1444#1 <-- Display.m - registration functions for Display module
http://www.common-lisp.net/paste/display/1444#2 <-- TicTacToe.lua - lua code
The output when run:
Registering redraw function: function: 0x334ed0
Size Requested: 640, 480
Table Registering with: 2
Table Registering with: 3
== table output ==
setsize function: 0x3338d0
getsize function: 0x325e60
__index function: 0x3595c0
__newindex function: 0x3580a0
== table output ==
-------- at this point it complains saying the metatable is null.
The table output that it is printing here is
<x-tad-bigger>print_table(</x-tad-bigger><x-tad-bigger>d</x-tad-bigger><x-tad-bigger>) on line 145 of #2. (note option at bottom to show line numbers)
But all of those entries should be in the metatable.
See line 73/74 in #1, and refer to line 118 in main paste.
In main paste:
line 142, checks for metatable, and makes one (147) and installs __index (149) and __newindex (150) handlers. Ten it sets it as the metatable for table specified (parameter:table) (156).
Line 167 retrieves metatable, and installs a 'get' function (185) for the property - in the metatable. Installs a 'set' function (191) for the property. Installs the metatable again (195) because it seems picky without it.
An important function used is AssignTable (52 main paste).
A check of this code makes me think that the stack level is fine.
Any help that people could give would be appreciated. Especially if there is something I am misunderstanding here.
"Reportedly, he remarked to one of his Christian missionary friends: 'What you teach us to do is admirable, but what you teach us to believe is foolish'."
- Referring to King Mongkut of Siam
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