lo3 programming language

Note

Claude Code is not used for the core func of this repo. Only for bug fixes, test/*, ...

What is this language about?

lo3 is a token based interpreted programming language written in C.

Website

See Main Website

See learn-the-syntax for examples and documentation.

Run lo3 at your own machine

lo3 {FILENAME}

This will start the interpreter and run your code.

Progress

Feature	Status
ALU Operations	✅
Control Flow	✅
Func Calling	✅
Input/STDIN	✅
Output/STDOUT	✅
Operating with vars	✅
Operating with g[]	⚠️ %2%
Manually exiting with 0 or 1	✅
Auto exiting	✅

---

%2%: to set some value into g[] is only possible with the buildin macro system. get g[X]... from every cmd

Compile it yourself

Linux:

cmake -B build
cmake --build build
./bin/lo3 test.lo3

or with the bash script:

chmod +x fbuild
./fbuild

Win:

cmake -B build
cmake --build build
.\bin\lo3.exe test.lo3

Add it to the PATH

Linux:

If you are root / have rights to sudo:

sudo cp ./bin/lo3 /usr/local/bin/

Or if you dont:

cp ./bin/lo3 ~/.local/bin/
export PATH="$HOME/.local/bin:$PATH"

Then you can just write lo3 ...

Windows:

Press Win+R input sysdm.cpl In more (or any other name) > Environment Variables In path add a new index and input there the path to this program.

For example: C:\Users\yourUserName\Desktop\lo3-core\build\

Tests

Tests are written in C++, Rust and Python to avoid language-level bias when testing a C core.

# run all tests
cmake --build build --target test