Symbol ; on the Moon

Asked

Viewed 166 times

1

How the symbol works ; on the moon?

;;;;
; ;

do ; end;
do ;end
do ;end;
do;end;
;do end
;do end;
;do ; end;
;;do ; end

do end
lua
  • 7

    I find the initiative to ask the answer too interesting. I am a master at doing this here. But I believe that, when you ask, both question and answer must be clear, so as not to give the impression that only you know how to answer what you asked. And editing the question will be a great opportunity for other users to put something else as an answer.

  • @Yeah, that’s what I’m doing. As I am doing this on mobile, my edits are being slow, I will still try to be clearer if possible.

  • @Wallacemaxters The answer was edited according to the new Dit in the question. Now I will find a way to clarify this on mobile.

  • 3

    Perfect! I was also using mobile today (a bag to edit/write)

  • @Wallacemaxters I think it gives p/ re-open the question

1 answer

6

*Obs.: statement is not an expressive instruction.*

Basically semicolons (the symbols ;) separate statements, but in version 5.2 there is a simple change.

Old-fashioned

Up to version 5.1, the semicolons separate statements, may appear only after the optional end of a statement. It is not necessarily semicolons that separate statements.

New operation

In version 5.2 semicolons generate, or in other words become Empty statements, statements that do nothing. It is nonspecific if Empty statements delimit statements, but they can be ignored (not "listed") by interpreters. No moon, for example, for (;;) ; in Ecmascript, where the Empty statement would be the body of that native loop, then the Lua interpreter simply ignores the Empty statements (not "list" them), it is possible to see this in the language source code.

This is perfectly valid in version 5.2+:

; chamada();;;;

Here is an example of how the versions differ.

That is always true:

do end;

but

do
    ;
end

,

; do end

or

;;;;;;;;;;;;;; do ;;;;; end ;;;;;;

are incorrect in versions below 5.2, as one or more semicolons do not appear after a statement.

Browser other questions tagged lua

You are not signed in. Login or sign up in order to post.