#include "compiler.hpp"
#include "error.hpp"

namespace lily {
    void compile_env::set_parent(std::shared_ptr<compile_env> p) {
        parent = p;
    }

    int compile_env_var::get_offset(const std::string& name) {
        if(this->var == name) return 0;
        if(parent) return parent->get_offset(name) + 1;
        throw error("unknown variable name");
    }

    bool compile_env_var::is_variable(const std::string& name) {
        if(this->var == name) return true;
        if(parent) return parent->is_variable(name);
        return false;
    }

    int compile_env_offset::get_offset(const std::string& name) {
        if(parent) return parent->get_offset(name) + offset;
        throw error("unknown variable name");
    }

    bool compile_env_offset::is_variable(const std::string& name) {
        if(parent) return parent->is_variable(name);
        return false;
    }
}