#define SASS_ENVIRONMENT
#include <map>
#ifndef SASS_NODE
#include "node.hpp"
#endif
namespace Sass {
using std::map;
struct Environment {
map<Token, Node> current_frame;
Environment* parent;
Environment* global;
Environment()
: current_frame(map<Token, Node>()), parent(0), global(0)
{ }
void link(Environment& env)
{
parent = &env;
global = parent->global ? parent->global : parent;
}
bool query(const Token& key) const
{
if (current_frame.count(key)) return true;
else if (parent) return parent->query(key);
else return false;
}
Node& operator[](const Token& key)
{
if (current_frame.count(key)) return current_frame[key];
else if (parent) return (*parent)[key];
else return current_frame[key];
}
void print()
{
for (map<Token, Node>::iterator i = current_frame.begin(); i != current_frame.end(); ++i) {
cerr << i->first.to_string() << ": " << i->second.to_string() << endl;
}
if (parent) {
cerr << "---" << endl;
parent->print();
}
}
};
}