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#ifndef GECODE_FLATZINC_SYMBOLTABLE_HH#define GECODE_FLATZINC_SYMBOLTABLE_HH
#include <vector>
#ifdef GECODE_HAS_UNORDERED_MAP#include <unordered_map>#elif defined(GECODE_HAS_GNU_HASH_MAP)#include <ext/hash_map>#else#include <map>#endif
namespace Gecode { namespace FlatZinc {
/// Symbol table mapping identifiers (strings) to values template<class Val> class SymbolTable { private:#ifdef GECODE_HAS_UNORDERED_MAP typedef std::unordered_map<std::string,Val> mymap;#elif defined(GECODE_HAS_GNU_HASH_MAP) class hashString { public: size_t operator ()(const std::string& x) const { return __gnu_cxx::hash<const char*>()(x.c_str()); } }; typedef __gnu_cxx::hash_map<std::string,Val,hashString> mymap;#else typedef std::map<std::string,Val> mymap;#endif mymap m; public: /// Insert \a val with \a key bool put(const std::string& key, const Val& val); /// Return whether \a key exists, and set \a val if it does exist bool get(const std::string& key, Val& val) const; };
template<class Val> bool SymbolTable<Val>::put(const std::string& key, const Val& val) { typename mymap::const_iterator i = m.find(key); bool fresh = (i == m.end()); m[key] = val; return fresh; }
template<class Val> bool SymbolTable<Val>::get(const std::string& key, Val& val) const { typename mymap::const_iterator i = m.find(key); if (i == m.end()) return false; val = i->second; return true; }
}}#endif
// STATISTICS: flatzinc-any