61 lines
1.3 KiB
C++
61 lines
1.3 KiB
C++
/*
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* Key.h
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*
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* Created on: Jan 12, 2010
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* @author: Frank Dellaert
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* @author: Richard Roberts
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*/
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#pragma once
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#include <boost/format.hpp>
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#include <boost/serialization/serialization.hpp>
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namespace gtsam {
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/**
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* Symbol key class is templated on
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* 1) the type T it is supposed to retrieve, for extra type checking
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* 2) the character constant used for its string representation
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* TODO: make Testable
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*/
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template <class T, char C>
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class Symbol {
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private:
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size_t j_;
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public:
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// Constructors:
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Symbol():j_(999999) {}
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Symbol(size_t j):j_(j) {}
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// Get stuff:
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size_t index() const { return j_;}
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const char* c_str() const { return (std::string)(*this).c_str();}
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operator std::string() const { return (boost::format("%c%d") % C % j_).str(); }
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std::string latex() const { return (boost::format("%c_{%d}") % C % j_).str(); }
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// logic:
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bool operator< (const Symbol& compare) const { return j_<compare.j_;}
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bool operator== (const Symbol& compare) const { return j_==compare.j_;}
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int compare(const Symbol& compare) const {return j_-compare.j_;}
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private:
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/** Serialization function */
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friend class boost::serialization::access;
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template<class Archive>
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void serialize(Archive & ar, const unsigned int version) {
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ar & BOOST_SERIALIZATION_NVP(j_);
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}
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};
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} // namespace gtsam
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