läspa

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A toy language I designed to be as easy as possible to implement. Reminiscent of lisp, läspa uses Reverse Polish Notation for basic arithmetic and for function calls. With a basic interpreter implemented, I plan to implement a compiler with the help of LLVM and plain machine-code generation.

Installation

shell cargo install laspa

You will need the llvm toolchain to build the executable. Clang is also used for linking. shell brew install llvm && export LLVM_SYS_160_PREFIX='/usr/local/opt/llvm@16'

Usage

See this test file for example syntax. ``` A simple Lisp-like language built with Rust

Usage: laspa [OPTIONS]

Arguments: The file to build

Options: -O, --optimization-level Optimization level for the compiler [default: 1] -i, --interpret Interpret the file -v, --verbose... Verbose output -o, --executable-name Executable name [default: main] --jit Execute IR with JIT -h, --help Print help (see more with '--help') -V, --version Print version ```

Why

I was reading an article on the fastest implementation of a binary search algorithm. I saw llvm and thought to myself: "Hmm, wouldn't it be interesting to make a language." The rest is history.

Important Code

The lex, parse, and eval functions are the meat of the execution of the language. Those familiar with language development will recognize those names. llvm.rs is crucial to generating and compiling the IR for LLVM executations.