Leviathan

Leviathan is a Lisp-inspired programming language. It is a toy project and not meant for serious use cases.

Leviathan compiles to bytecode for Urban engine.

The language currently only supports an assembler dialect but will also support a more comfortable dialect with variables etc. in the future.

Assembler

Example program

; main.lvt
(mod assembly)

(static message "Hello world!\n")

(-label main (do
  (mov r0 1u) ; move 1 into r0 (file descriptor)
  (ref r1 message) ; load address of message into r1
  (ldr r2 r1 -8) ; load the length of the string into r2
  (int 1u) ; write interrupt
  (halt) ; halt the process
))

Project

A project consists of:

• A build.lvt.toml file with the build configuration
• A src directory with the source files
• The main.lvt source file in the src directory with a main function
• Other source files in the src directory

Config

The build configuration looks like this:

[package]
name = "my-package"
version = "1.0.0"

Building

To build the project run

lvt build

in the project directory.

The binary will be placed in out/project-name.bin with project-name getting replaced with the name in your build configuration.

Running

To run the compiled binary run

urban run path/to/binary

with the path to the binary.