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2009/12/13 Luiz Henrique de Figueiredo <>
> So you are saying that a configure script which sets up Lua before compiling
> the library and does not check that types are large enough to pass a
> standard type and retrieve the same type is not a bug?

Lua does not use a configure script. There is no automatic setup.
Lua uses a config header file that you're supposed to check and edit
to suit your platform. The relevant section in luaconf.h is

I apologise, I just take it for granted that most libraries use configure scrips. sorry.
@@ LUA_INTEGER is the integral type used by lua_pushinteger/lua_tointeger.
** CHANGE that if ptrdiff_t is not adequate on your machine. (On most
** machines, ptrdiff_t gives a good choice between int or long.)
#define LUA_INTEGER     ptrdiff_t

I guess the comment should make it clear that LUA_INTEGER should limit
integers to what can be stored without loss in a LUA_NUMBER.

A make test that failed would be nice, so that when building we knew there was a problem. I would not expect many people actually run there own tests to see if the defaults are good enough.

What do you suggest I change LUA_INTERGER to? ptrdiff_t is the same size as long which is the largest possible standard integer type. Should it be long double as suggested?