/
context.hpp
55 lines (44 loc) · 1.3 KB
/
context.hpp
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#define SASS_CONTEXT_INCLUDED
#include <utility>
#include <map>
#include "functions.hpp"
namespace Sass {
using std::pair;
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];
}
};
struct Context {
Environment global_env;
map<pair<string, size_t>, Function> function_env;
vector<char*> source_refs;
size_t ref_count;
Context();
~Context();
void register_function(Function_Descriptor d, Implementation ip);
void register_function(Function_Descriptor d, Implementation ip, size_t arity);
void register_functions();
};
}