komiC • malloc(brain)

komiC is a compiler for komiLang, written from scratch in C. The aim is narrowed towards running a program by building the compiler myself, with no parser generators and no LLVM support…and partly to fulfill a childish dream in my freshman year - of making a compiler

I wrote a shell first (komi.sh, with a recursive descent parser). komiC is the next step: a real language with types, functions, and native output.

The language

komiLang is small and readable, with typed functions, let bindings, if/else, and while.

fn add(a: int, b: int) -> int {
    return a + b;
}

fn main() {
    let x = add(10, 20);

    if x > 20 {
        print("large");
    }
}

The pipeline

source → tokens → AST → semantic analysis → IR → x86-64 assembly → executable

Lexer: hand-written, tokens stored as a struct of arrays
Parser: recursive descent for declarations and statements, Pratt parsing for expressions
Semantic analysis: type checking with diagnostics
IR → x86-64: : future_work
Memory: arena allocation in future
External tools: GNU as to assemble, gcc to link

Status

[Work in Progress]

kush1jpeg/komiC

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