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List:       lua-l
Subject:    Re: Upcoming changes in Lua 5.4
From:       "Soni \"They/Them\" L." <fakedme () gmail ! com>
Date:       2018-01-26 1:15:00
Message-ID: 2c06f6d4-b7a3-4f69-7cdb-14b429c73ffa () gmail ! com
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On 2018-01-25 11:04 PM, Sean Conner wrote:
> It was thus said that the Great Paige DePol once stated:
> > Soni They/Them L. <fakedme@gmail.com> wrote:
> > 
> > > The main difference between Lua 5.3 and "Lua 5.4" is that Lua 5.3 does TCO
> > > of varargs, I think. This isn't (yet) possible with "Lua 5.4" (but it'd be
> > > nice if it was).
> > What do you mean by TCO? Also why quote "Lua 5.4" like that, the GitHub
> > source code identifies itself as Lua 5.4 now.
> Tail call optimization---basically a form of GOTO.
> 
> -spc
> 
> 

if statements are a form of GOTO.

loops are a form of GOTO.

function calls are a form of GOTO (+ stack management).

*returns* are a form of GOTO.

TCO is a function call with optimized/"smart" stack management. this can 
include e.g. realloc'ing an array (5.3 varargs) instead of GC.

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