unused code removal

[eugeny gladkih]

re,

will the compiler remove unused a local variable and a string in the code like that?

local function get_locations()
local PXY_ETC_DIR<const> = '/opt/pxy/etc’
local PXY_HOME_ROOT<const> = '/opt/pxy’
local PXY_RUN_DIR<const> = '/run’
local PXY_VAR_ROOT<const> = '/var/opt/pxy'

return PXY_HOME_ROOT..'/', PXY_ETC_DIR..'/', PXY_VAR_ROOT..'/'
end

‘PXY_RUN_DIR’ is not used here at all.

--
Yours sincerely, Eugeny.

[Андрей Закатов]

As far as I'm aware Lua does not optimize anything currently, so you'll still have space allocated for it.

You can also luac -l -l the file to see what the bytecode would look like

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[Андрей Закатов]

Oh apparently I'm wrong and looking at the output of the luac the /run is indeed removed

Damn...

[Bas Groothedde]

They are marked const, so they are not variables.

Remove the const and see what happens. 

~b

On 11 Nov 2025, at 18:20, Андрей Закатов <zahat...@gmail.com> wrote:



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