Re: Clarification needed: naming conventions

[Lorenzo Donati <lorenzodonatibz@...>]

On 11/04/2011 18.07, Luiz Henrique de Figueiredo wrote:
> > 2. Is the underscore itself to be considered an uppercase letter? I.e.
> > is __VERSION (two underscores at the beginning) to be considered reserved?
>
> The manual says in http://www.lua.org/manual/5.1/manual.html#2.1 that
> __VERSION is not considered reserved. Sorry for the noise.
Sorry, but I don't see anything stating that clearly. More specifically 
(3rd paragraph - emphasis mine):

Lua is a case-sensitive language: and is a reserved word, but And and 
AND are two different, valid names. As a convention, names *starting 
with an underscore followed by uppercase letters (such as _VERSION)* are 
reserved for internal global variables used by Lua.


My doubt was whether the underscore is to be considered uppercase, in 
which case __VERSION would be reserved. If the underscore is not to be 
considered an uppercase letter, then __VERSION would not be reserved 
(since in a previous message you clarified reserved names are _all_ 
uppercase). Therefore I think your clarification was needed (unless one 
sticks to the lexicographic meaning of "letters", but there are some 
computer languages in which the underscore is considered a letter, hence 
my doubt).

Am I missing something?