#include "var.hpp"

#include <list>
#include <map>
#include <string>

static std::list<std::map<std::string, Var>> llvmVars;

Var Var::lookup(const std::string& name, int skip)
{
    for (auto sc = llvmVars.rbegin(); sc != llvmVars.rend(); ++sc) {
        if (skip > 0) {
            --skip;
            continue;
        }
        if (sc->contains(name))
            return (*sc)[name];
    }

    return {};
}

void Var::pushScope()
{
    llvmVars.emplace_back();
}

void Var::popScope()
{
    llvmVars.pop_back();
}

Var& Var::addGlobal(const std::string& name, Var var)
{
    return llvmVars.front().emplace(name, var).first->second;
}

Var& Var::addLocal(const std::string& name, Var var)
{
    return llvmVars.back().emplace(name, var).first->second;
}