VM-Builder is a tool to easily create simple virtual machine with dynamic allocated memory by Vec<T> through implementing for operator a trait Op<T>. It does not provide a parser, so code for calling VM look like:
```rust
fn main() {
let program: Vec
let vm: VM<any> = VM::init(program);
vm.run();
} ```
any is just Box<dyn std::any::Any> but you can put any type, of course.
Op<T> is
rust
pub trait Op<T> {
fn exec(&mut self, pc: *mut usize, memory: *mut Vec<T>);
}
E.g. you want to implement a operator jmp and log for printing.
Log:
rust
struct Log {value: String}
impl<T> Op<T> for Log {
fn exec(&mut self, pc: *mut usize, memory: *mut Vec<T>) {
println!("{}", self.value);
}
}
Jmp:
```rust
struct Jmp {counter: usize, jumped: bool}
impl Jmp {
pub fn new(counter: usize) -> Self {
Self {counter, jumped: false}
}
}
impl
For avoiding non-expecting behavior the first operator has to be built-in `Init`. Self-repeating (2 times) "Hello, world!" in example language:
rust
fn main() {
let program: Vec
let vm: VM<any> = VM::init(program);
vm.run();
}