tuqqu/cogo

Golang Bytecode Compiler & Virtual Machine

Cogo

A bytecode compiler and a virtual machine for a subset of Go, written in Rust

// an example of a fully compiling program

package main

var (
    x uint8 = 255
    vec     = []int{45, 23, -7, int(x), 0, -102}
)

func main() {
    insertionSort(vec) // [-102 -7 0 23 45 255]
    println("Vector is sorted.")
}

func insertionSort(vec []int) {
    for i, n := 1, len(vec); i < n; i++ {
        j := i
        for j > 0 {
            if vec[j-1] > vec[j] {
                vec[j], vec[j-1] = vec[j-1], vec[j]
            }
            j--
        }
    }
}

Implemented Features

• primitive types and type conversions
• comparison, math, logic, bitwise operations
• variables and constants
  • global and scoped
  • group declarations
  • multiple declarations and assignments
• control flow
  • if statements
  • for statements (with breaks and continue)
  • switch statements (with fallthrough)
• functions
  • recursive functions
  • variadic functions
  • multiple return values
• partial support of builtin.go
• arrays
• slices (partially)
• closures
• range and for range loops