Luai - Lua Interpreter

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#1

I’ve written an interpreter with a fully functioning lexer and parser. I see no actual use for it, but I thought it was a cool concept. I might make a game for this, with a script editor and output, and io.

You can get the module here and view the source here. Feel free to contribute by creating pull requests.

To run, create a script, and put this in it. At the moment, it only supports variables and printing.

local luai = require(path.to.module)

luai([[
    local my_var = true
    print(my_var)
]])

This would print “true”.

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Creations Made by zCrxtix
#2

This is great! I think I have seen some custom load string scripts and such, but the ease of use that this provides is excellent.

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#3

Can you upload the source to GitHub?

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#4

I made the repository and posted the link.

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#5

Quick update: added support for strings and decimals.

#6

What language is this? From the title, I thought it was a Lua code interpreter made in Roblox Luau, but it seems like it interprets JavaScript instead?

#7

It’s not a specific language, I just chose my own syntax. I guess you could say I made my own “language”.

#8

After reading the source, you should change your terminology here. A lexer separates groups of characters into language-specific tokens. A parser reads the tokens and returns an AST (Abstract Syntax Tree). An interpreter reads the AST top-down and execute what’s on the tree.

#9

Yeah I was gonna make a script editor off another Lua module but this might be more efficient as the module I’m using is slower than Lua.

May I ask, what’s the speed compared to Lua and this module?

#10

Why don’t you run a test using tick()?

#11

I’m lazy and don’t know any slow functions

#12

Its as simple as this:

local currentTime = tick()
wait(1)
local endTime = tick() - currentTime
print("Took "..endTime.." seconds.")
#13

ik but idk any slow functions to see the actual result of speed

#14

They seem to have a similar time of 0.0003 seconds.

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#15

goodbye vlua, hello luai

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#16

It’s not done yet. I’m reworking the parser, so there’ll be limited functions.

#17

Could you list the following functions available or is it too much?

#18

At the moment, you can only create variables and print to the output.

#19

well ig I’ll stick to vlua for now until all of the functions are added

Thanks for the info

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#20

Pretty nice! I could see some useful in-game debugging applications for this.

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