pythonvm-rust/src/processor/frame.rs at wordcode · progval/pythonvm-rust · GitHub

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use std::collections::HashMap;

use std::rc::Rc;

use std::cell::RefCell;

use super::super::varstack::VectorVarStack;

use super::super::objects::{ObjectRef, Code};

use super::instructions::{Instruction, InstructionDecoder};

#[derive(Debug)]

pub enum Block {

Loop(usize, usize), // begin, end

TryExcept(usize, usize), // begin, end

ExceptPopGoto(ObjectRef, usize, usize), // If an exception matchs the first arg matches, pop n elements from the stack and set the PC to the second arg

}

#[derive(Debug)]

pub struct Frame {

pub object: ObjectRef,

pub var_stack: VectorVarStack<ObjectRef>,

pub block_stack: Vec<Block>,

pub locals: Rc<RefCell<HashMap<String, ObjectRef>>>,

pub instructions: Vec<Instruction>,

pub code: Code,

pub program_counter: usize,

}

impl Frame {

pub fn new(object: ObjectRef, code: Code, locals: Rc<RefCell<HashMap<String, ObjectRef>>>) -> Frame {

let instructions: Vec<Instruction> = InstructionDecoder::new(code.code.iter()).into_iter().collect();

Frame {

object: object,

var_stack: VectorVarStack::new(),

block_stack: Vec::new(),

locals: locals,

instructions: instructions,

code: code,

program_counter: 0,

}

pythonvm-rust/src/processor/frame.rs at wordcode · progval/pythonvm-rust · GitHub

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