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#ifndef SYMBOL_HPP
#define SYMBOL_HPP
#include <list>
#include <map>
#include <string>
namespace SpasmImpl
{
namespace ASM
{
//! Represents symbol table entry for the assembler
class Symbol
{
public:
typedef std::list<size_t> Positions_t;
static const size_t notdefined;
Symbol();
Symbol(const std::string&, size_t = 0);
const std::string& identifier() const;
size_t definition() const;
void define(size_t);
size_t add_position(size_t);
Positions_t::const_iterator positions_begin() const;
Positions_t::const_iterator positions_end() const;
private:
//! identifier of the symbol
std::string _identifier;
//! position of definition of the identifier
size_t _definition;
//! list of uses of the identifier (positions)
Positions_t _positions;
};
//! This is the symbol table of the assembler
class Symbol_Table
{
private:
typedef std::map<std::string, Symbol*> Table_t;
typedef Table_t::iterator iterator;
public:
Symbol_Table();
typedef Table_t::const_iterator const_iterator;
Symbol* find(const std::string&) const;
Symbol* insert(const std::string&, size_t);
Symbol* define(const std::string&, size_t);
const_iterator begin() const;
const_iterator end() const;
private:
Symbol_Table(const Symbol_Table&);
Symbol_Table& operator=(const Symbol_Table&);
Table_t _table;
};
} // namespace ASM
} // namespace SpasmImpl
#endif // SYMBOL_HPP
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