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Nolang Introduction

Nolang is an experimental systems programming language that adopts a pass-by-reference model and safe scope model to achieve absolute memory safety. No GC.

Core Features​

  • Developer-friendly: No pointers, no ownership, no lifetimes...
  • Pass by reference: All function parameters are references; functions return results by modifying parameters
  • Automatic memory management: Through the safe scope model, memory is automatically released when leaving scope — no dangling pointers or memory leaks
  • No GC: No memory leaks, so no GC needed
  • Performance-first: deferred move; variables can be allocated once and freed once
  • Method overloading: Efficient performance through monomorphization
  • Interfaces: Support interface declaration, default implementations, and multi-interface inheritance
  • Generics: Support type and value generics
  • Pattern matching: Unique match design, simpler to use

Quick Start​

; Hello, World!
; No main entry point needed
print('Hello, Nolang!')

; Variable declaration
i64

; Function definition
add = (a i64, b i64) (result i64) {
    result = a + b
}

; Standard library method, can be called directly
c = math.max(a, b)

; Struct
user {
    name str
    age i64
}

u = user {
    name: 'Alice'
    age: 30
}

; Method
user.greet = () {
    print('Hello, ' - .name)
}

u.greet()