Re: [MANUAL]: Discrepancy in documentation of lua_type

[Viacheslav Usov <via.usov@...>]

On Tue, Mar 6, 2018 at 1:25 PM, Dirk Laurie <dirk.laurie@gmail.com> wrote:

> Why, if we are supposed to use symbolic constants, is LUA_TNIL (0) explicitly mentioned as the first?

Looking at the of manual v.4.0, where lua_gettype() was first documented (shortly after it had been introduced, the one with modern numeric, rather than string, types), the types were enumerated as follows:

LUA_TNIL, LUA_TNUMBER, LUA_TSTRING, LUA_TTABLE, LUA_TFUNCTION, LUA_TUSERDATA

At that time, these were defined as follows:

#define LUA_TUSERDATA 0

#define LUA_TNIL 1

#define LUA_TNUMBER 2

#define LUA_TSTRING 3

#define LUA_TTABLE 4

#define LUA_TFUNCTION 5

With the exception of LUA_TUSERDATA, the order is straight-forward. The additions of more types later must have made ordering them more challenging.

Cheers,

V.