Luai - Lua Interpreter

[zCrxtix (zavier)]

Update

[+] Updated parser
[+] Added interpreter

Decided to do a quick test, Luai vs vLua. Here’s the results:
Luai: 0.0007014274597168
vLua: 0.0044927597045898

[binky007]

the e-05 in the loadstring time actually means 0.00001 so loadstring is actually over 100x faster than LuaI

[zCrxtix (zavier)]

I removed that, but loadstring is exploitable so this is a better alternative, even with its limited functions.

[MixedConscience (who)]

Well, could you possibly write some grammar and standards for it?

Hard to know what’s there and what to use without a set standard or definition of namespaces, keywords, and functions in the language.

For example:

It explains how you would build a function, string, number, negative (unary), etc, etc
An example:

printStatement -> "out" expression ";"

--translates to

out(1); -- prints "1"

Luau has this in their source code (look in Parser.cpp):

• If statement
  

• While and Repeat loops
  
  

And a little bit of information:

• If you’re looking to BUILD a programming language/interpreter later on in the future, don’t use Luau/Lua. They lack a lot of useful features used to make one.

Anyways, nice job on this, continue doing what you’re doing

[zCrxtix (zavier)]

Thanks, but it’s like loadstring. Refer to the Luau syntax.

[MixedConscience (who)]

@zCrxtix

luai([[
    let my_var = true
    println(my_var)
]])

Could you change this then if it’s related to Luau’s grammar and syntax?
Looks kind of like a mix of JavaScript and Java, so I mentioned setting a standard and giving more context on the grammar.

[zCrxtix (zavier)]

My bad, I recently changed the keywords of it.

[ItzEthanPlayz_YT (RadiatedExodus)]

PSA: Enabling LoadStringEnabled doesn't instantly jeopardise your games

Often within the Scripting Support categories, I’ve taken notice to a lot of responses informing you that you need to disable LoadStringEnabled otherwise your game is up for exploiter attacks or some kind of other nonsense. The Game Security article to which is mentioned in the LoadStringEnabled warning doesn’t do much of a good job explaining the potential risks of it either. Due to all these responses, misconceptions and lack of information, I’d like to respond semi-decisively to the debacle …

[BIGHEAD_RIPOFF]

Sorry for bumping. But this seems like a great alternative to vLua! I’m gonna use this.

This is an underrated module.

[zCrxtix (zavier)]

Thanks for the feedback! I’ve paused this project as I work on writing a programming language in C so I can fully understand the concept of language design (500 unfinished projects is the developer life lmao). Once I finish that, I’ll continue developing this.

[KinderHSPVA]

Is there a way to stop the code from accessing the game itself?

[sangfoolery (sa ng)]

i was looking over the code you wrote and noticed a striking similarity in the code for the lexer to code I wrote a year later by myself for a toy language i was going to make, without knowing your project even existed LOL

I just think its pretty funny we both had almost the exact same approach

s-a-ng/FLUID/blob/main/Lexer.lua