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#ifndef SEARCH_WORD__
#define SEARCH_WORD__
#include "lm/word_index.hh"
#include <boost/functional/hash.hpp>
#include <string>
#include <utility>
namespace search {
class Word {
public:
// Construct a non-terminal.
Word() : entry_(NULL) {}
explicit Word(const std::pair<const std::string, lm::WordIndex> &entry) {
entry_ = &entry;
}
// Returns true for two non-terminals even if their labels are different (since we don't care about labels).
bool operator==(const Word &other) const {
return entry_ == other.entry_;
}
bool Terminal() const { return entry_ != NULL; }
const std::string &String() const { return entry_->first; }
lm::WordIndex Index() const { return entry_->second; }
protected:
friend size_t hash_value(const Word &word);
const std::pair<const std::string, lm::WordIndex> *Entry() const { return entry_; }
private:
const std::pair<const std::string, lm::WordIndex> *entry_;
};
inline size_t hash_value(const Word &word) {
return boost::hash_value(word.Entry());
}
} // namespace search
#endif // SEARCH_WORD__
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