slige/runtime/vm.hpp

#pragma once

#include "arch.hpp"
#include "value.hpp"
#include <cstddef>
#include <cstdint>
#include <vector>

namespace sliger {

class VM {
public:
    VM(const std::vector<Op>& program)
        : program(program.data())
        , program_size(program.size())
    {
    }
    void run();

    inline void step() { this->pc += 1; }

    inline auto eat_as_op() -> Op
    {
        auto value = curr_as_op();
        step();
        return value;
    }

    inline auto curr_as_op() const -> Op
    {
        return static_cast<Op>(this->program[this->pc]);
    }

    inline auto done() const -> bool { return this->pc >= this->program_size; }

private:
    uint32_t pc = 0;
    const Op* program;
    size_t program_size;
    std::vector<Value> stack;
    std::vector<Value> pool_heap;
};
}