RE: table to string
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- Subject: RE: table to string
- From: "Nick Trout" <nick@...>
- Date: Fri, 6 Feb 2004 10:26:55 -0800
> When I encounter a return value after lua_pcall that is lua_istable, I
> want to get the table name as a string. Do I just call lua_tostring?
Or is
> there some sort of "lua_totable"? (Although I don't want the table,
just
> the name)
Unfortunately the table name is ambiguous because several variables can
point to it, e.g.
A = {}
B = A
What is the name now? A or B, or both? (A: probably both) A and B are
really references to an object, which is a table. They are not the
"name" of the table.
You could add an entry in your table:
A = { name='foo' }
Then when you get your table back from lua_pcall you can
lua_pushliteral(L, "name");
lua_gettable(L, -2); // index to returned value
const char *name = lua_tostring(L, -1);
lua_pop(L, 1); // pop name
Or you could have a weak keyed table which has a reference to your
table, using the table reference as a key.
table_names = {} -- make weak keyed...
A = {}
table_names[A] = 'foo'
-- get table name
print(table_names[a_table])