RE: return multiple values from C
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- Subject: RE: return multiple values from C
- From: "Jerome Vuarand" <jerome.vuarand@...>
- Date: Thu, 1 Feb 2007 15:55:49 -0500
Shea Martin wrote:
> in my c function (registered as foo) I push two numbers on the stack.
> In my script, I have this:
>
> x,y = foo()
>
> but only x gets a value, y is set to nil. What am I doing
> wrong here?
> Roberto's book does not really talk about embedding.
Without the foo source code any answer would be just asumptions. Here is
my guess. You wrote:
int foo(lua_State* L)
{
lua_pushnumber(L, 32);
lua_pushnumber(L, 47);
return 1;
}
Instead of 1 you should return the number of return values:
int foo(lua_State* L)
{
lua_pushnumber(L, 32);
lua_pushnumber(L, 47);
return 2; /* <- Note the 2 instead of the 1 in the above example */
}
http://www.lua.org/manual/5.1/manual.html#lua_CFunction