Does Fibaro Lua support goto continue syntax?

[Neo Andersson 230]

Hello guys,
I never used it in fobaro, and i dont know the syntax

Does Fibaro Lua support goto continue ?
Any example please?

[Łukasz997 117]

Syntax is:

goto label

...

::label::

I am wondering where this is justified to be used.

A case that comes to my mind is multi-nested loop exit; I hope this is one of rare cases when goto simplifies code.

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goto is used in this example instead of packing loop into a function or have a flag and double break.

You cannot jump to the different scope of variables, o.e. inside for...end loop, do...while with local definition.

But this is probably obvious.

In turn you can jump out of such blocks.

 

In general - it has negative impact of code clarity. As a kid I used it with Atari Basic.

PS. Maybe this is more general: You cannot use goto to jump into a block in a way that skips the initialization of local variables.

Edited January 21 by Łukasz997

[Łukasz997 117]

Without goto - is it really less clear? Maybe...

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Or maybe someone knows better use cases?

[jgab 2,642]

The only reason "may" be to break out from nested loops like your example but in general it should be avoided. Reason beyond hard-to-follow code, it usually makes it hard for the compiler to optimize the code flow and do register allocations as normal block entry/exits are invalidated.

 

 

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Alt2. factor out a find function that you can return from.
 

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Edited January 22 by jgab

[Neo Andersson 230]

thanks, yes  as you wrote..
I would need it to be used in very rare cases..mosty in nested loops, and in loops when inner part of the loop is long and hard to see what is where (Fibaros editor is not the best, although its better than it was 2 years ago)
Thanks anyway for both of you

[Łukasz997 117]

5 minut temu, Neo Andersson napisał:

mosty in nested loops, and in loops when inner part of the loop is long and hard to see what is where

I don’t know your specific case, but I would advise against goto.
It’s somewhat of an atavistic leftover from old programming languages.
By wrapping the code in loop to a local function, you can significantly shorten such block.

[jgab 2,642]

9 hours ago, Łukasz997 said:

I don’t know your specific case, but I would advise against goto.
It’s somewhat of an atavistic leftover from old programming languages.
By wrapping the code in loop to a local function, you can significantly shorten such block.

 

Yes, and you can get some interesting errors - like if you introduce a local variable "within" the jump

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Edited January 22 by jgab