differences.md

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Nelua reimplements every Lua library. Due to this, some functions are not implemented or can't be implemented. This page shows the availability of Lua functions in Nelua.

Implemented - ✔

Not Implemented Yet - ❌

Never or N/A - ✖

{: .lead}

Basic and globals

Function	Status	Nelua Library	Remarks
_G{:.language-nelua}	❌		_G doesn't exist in Nelua due to missing dynamic in C (rephrase me please).
_VERSION{:.language-nelua}	✔	basic{:.language-nelua}	Returns Nelua version instead of Lua version.
assert{:.language-nelua}	✔	basic{:.language-nelua}
collectgarbage{:.language-nelua}	✔	allocators.gc{:.language-nelua}	Only collect, stop, restart, count and isrunning arguments.
dofile{:.language-nelua}	✖		Nelua can't compile at the runtime.
error{:.language-nelua}	✔	basic{:.language-nelua}
getmetatable{:.language-nelua}	❌	basic{:.language-nelua}
load{:.language-nelua}	✖
loadfile{:.language-nelua}	✖
next{:.language-nelua}	✔	iterators{:.language-nelua}
pairs{:.language-nelua}	✔	iterators{:.language-nelua}	Aliased to ipairs right now.
ipairs{:.language-nelua}	✔	iterators{:.language-nelua}
pcall{:.language-nelua}	❌	basic{:.language-nelua}
print{:.language-nelua}	✔	inlined	Nelua generates print function for each type.
rawequal{:.language-nelua}	❌	basic{:.language-nelua}
rawget{:.language-nelua}	❌	basic{:.language-nelua}
rawlen{:.language-nelua}	❌	basic{:.language-nelua}
rawset{:.language-nelua}	❌	basic{:.language-nelua}
require{:.language-nelua}	✔	Nelua compiler	Exists as compiler function.
select{:.language-nelua}	❌	basic{:.language-nelua}
setmetatable{:.language-nelua}	❌	basic{:.language-nelua}
tonumber{:.language-nelua}	✔	stringview{:.language-nelua}
tostring{:.language-nelua}	✔	string{:.language-nelua}	As Lua this function uses __tostring{:.language-nelua}, however Nelua also has __tostringview{:.language-nelua} which exists in stringview{:.language-nelua} library.
type{:.language-nelua}	✔	traits{:.language-nelua}
warn{:.language-nelua}	❌	basic{:.language-nelua}
xpcall{:.language-nelua}	❌	basic{:.language-nelua}
{: .table.table-bordered.table-striped.table-sm}

Coroutine

❌ The library is not implemented yet.

Debug

❌ The library is not implemented yet. For debugging use --debug flag and a C debugger.

IO and FILE*

Nelua has additional functions in this library. See here. {: .callout.callout-info}

Function	Status	Nelua Library	Remarks
io.close{:.language-nelua}	✔	io{:.language-nelua}
io.flush{:.language-nelua}	✔	io{:.language-nelua}
io.input{:.language-nelua}	✔	io{:.language-nelua}
io.lines{:.language-nelua}	✔	io{:.language-nelua}
io.open{:.language-nelua}	✔	io{:.language-nelua}
io.output{:.language-nelua}	✔	io{:.language-nelua}
io.popen{:.language-nelua}	❌	io{:.language-nelua}
io.read{:.language-nelua}	✔	io{:.language-nelua}	Doesn't support *n format and multiple arguments.
io.stderr{:.language-nelua}	✔	io{:.language-nelua}
io.stdin{:.language-nelua}	✔	io{:.language-nelua}
io.stdout{:.language-nelua}	✔	io{:.language-nelua}
io.tmpfile{:.language-nelua}	✔	io{:.language-nelua}
io.type{:.language-nelua}	✔	io{:.language-nelua}
io.write{:.language-nelua}	✔	io{:.language-nelua}	Doesn't support multiple arguments.
file:close{:.language-nelua}	✔	filestream{:.language-nelua}
file:flush{:.language-nelua}	✔	filestream{:.language-nelua}
file:lines{:.language-nelua}	✔	filestream{:.language-nelua}
file:read{:.language-nelua}	✔	filestream{:.language-nelua}	Doesn't support *n format and multiple arguments.
file:seek{:.language-nelua}	✔	filestream{:.language-nelua}
file:setvbuf{:.language-nelua}	✔	filestream{:.language-nelua}
file:write{:.language-nelua}	✔	filestream{:.language-nelua}	Doesn't support multiple arguments. Doesn't return the file itself.
{: .table.table-bordered.table-striped.table-sm}

Math

Nelua has additional functions in this library. See here. {: .callout.callout-info}

Function	Status	Nelua Library	Remarks
math.abs{:.language-nelua}	✔	math{:.language-nelua}
math.acos{:.language-nelua}	✔	math{:.language-nelua}
math.asin{:.language-nelua}	✔	math{:.language-nelua}
math.atan{:.language-nelua}	✔	math{:.language-nelua}
math.atan2{:.language-nelua}	✔	math{:.language-nelua}
math.ceil{:.language-nelua}	✔	math{:.language-nelua}
math.cos{:.language-nelua}	✔	math{:.language-nelua}
math.cosh{:.language-nelua}	✔	math{:.language-nelua}
math.deg{:.language-nelua}	✔	math{:.language-nelua}
math.exp{:.language-nelua}	✔	math{:.language-nelua}
math.floor{:.language-nelua}	✔	math{:.language-nelua}
math.fmod{:.language-nelua}	✔	math{:.language-nelua}
math.frexp{:.language-nelua}	✔	math{:.language-nelua}
math.huge{:.language-nelua}	✔	math{:.language-nelua}
math.ldexp{:.language-nelua}	✔	math{:.language-nelua}
math.log{:.language-nelua}	✔	math{:.language-nelua}
math.log10{:.language-nelua}	✔	math{:.language-nelua}
math.max{:.language-nelua}	✔	math{:.language-nelua}
math.maxinteger{:.language-nelua}	✔	math{:.language-nelua}
math.min{:.language-nelua}	✔	math{:.language-nelua}
math.mininteger{:.language-nelua}	✔	math{:.language-nelua}
math.modf{:.language-nelua}	✔	math{:.language-nelua}
math.pi{:.language-nelua}	✔	math{:.language-nelua}
math.pow{:.language-nelua}	✔	math{:.language-nelua}
math.rad{:.language-nelua}	✔	math{:.language-nelua}
math.random{:.language-nelua}	✔	math{:.language-nelua}	The same as in Lua 5.4.
math.randomseed{:.language-nelua}	✔	math{:.language-nelua}	The same as in Lua 5.4.
math.sin{:.language-nelua}	✔	math{:.language-nelua}
math.sinh{:.language-nelua}	✔	math{:.language-nelua}
math.sqrt{:.language-nelua}	✔	math{:.language-nelua}
math.tan{:.language-nelua}	✔	math{:.language-nelua}
math.tanh{:.language-nelua}	✔	math{:.language-nelua}
math.tointeger{:.language-nelua}	✔	math{:.language-nelua}
math.type{:.language-nelua}	✔	math{:.language-nelua}
math.ult{:.language-nelua}	✔	math{:.language-nelua}
{: .table.table-bordered.table-striped.table-sm}

OS

Function	Status	Nelua Library	Remarks
os.clock{:.language-nelua}	✔	os{:.language-nelua}
os.date{:.language-nelua}	✔	os{:.language-nelua}	Doesn't support formats. Only %c{:.language-nelua}
os.difftime{:.language-nelua}	✔	os{:.language-nelua}
os.execute{:.language-nelua}	✔	os{:.language-nelua}	POSIX status codes are not translated.
os.exit{:.language-nelua}	✔	os{:.language-nelua}
os.getenv{:.language-nelua}	✔	os{:.language-nelua}
os.remove{:.language-nelua}	✔	os{:.language-nelua}
os.rename{:.language-nelua}	✔	os{:.language-nelua}
os.setlocale{:.language-nelua}	✔	os{:.language-nelua}
os.time{:.language-nelua}	✔	os{:.language-nelua}	Default value for .hour is 0 not 12.
os.tmpname{:.language-nelua}	✔	os{:.language-nelua}	Uses mkstemp{:.language-nelua} on POSIX.
{: .table.table-bordered.table-striped.table-sm}

Package

✖ Nelua doesn't have a module system.

String

Nelua has additional functions in this library. See here and here. {: .callout.callout-info}

Function	Status	Nelua Library	Remarks
string.byte{:.language-nelua}	✔	stringview{:.language-nelua}	No multiple arguments. Errors on failure.
string.char{:.language-nelua}	✔	string{:.language-nelua}	Only for string{:.language-nelua}. No multiple arguments.
string.dump{:.language-nelua}	✖	string{:.language-nelua}	No interpreted functions.
string.find{:.language-nelua}	✔	stringview{:.language-nelua}	Patterns are not supported. Returns 0, 0{:.language-nelua} instead of nil{:.language-nelua} if nothing was found.
string.format{:.language-nelua}	✔	string{:.language-nelua}	No multiple arguments.
string.gmatch{:.language-nelua}	❌	string{:.language-nelua}
string.gsub{:.language-nelua}	❌	string{:.language-nelua}
string.len{:.language-nelua}	✔	stringview{:.language-nelua}
string.lower{:.language-nelua}	✔	string{:.language-nelua}
string.match{:.language-nelua}	❌	string{:.language-nelua}
string.pack{:.language-nelua}	❌	string{:.language-nelua}
string.packsize{:.language-nelua}	❌	string{:.language-nelua}
string.rep{:.language-nelua}	✔	string{:.language-nelua}
string.reverse{:.language-nelua}	✔	string{:.language-nelua}
string.sub{:.language-nelua}	✔	string{:.language-nelua}
string.unpack{:.language-nelua}	❌	string{:.language-nelua}
string.upper{:.language-nelua}	✔	string{:.language-nelua}
string.__len{:.language-nelua}	✔	stringview{:.language-nelua}
string.__eq{:.language-nelua}	✔	stringview{:.language-nelua}
string.__lt{:.language-nelua}	✔	stringview{:.language-nelua}
string.__le{:.language-nelua}	✔	stringview{:.language-nelua}
string.__sub{:.language-nelua}	✔	stringview{:.language-nelua}
string.__add{:.language-nelua}	✔	stringview{:.language-nelua}
string.__pow{:.language-nelua}	✔	stringview{:.language-nelua}
string.__unm{:.language-nelua}	✔	stringview{:.language-nelua}
string.__div{:.language-nelua}	✔	stringview{:.language-nelua}
string.__idiv{:.language-nelua}	✔	stringview{:.language-nelua}
string.__mul{:.language-nelua}	✔	stringview{:.language-nelua}
string.__mod{:.language-nelua}	✔	stringview{:.language-nelua}
{: .table.table-bordered.table-striped.table-sm}

Table

❌ Dynamic tables are not implemented yet.

UTF-8

❌ Not implemented yet.

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