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/**
** \file parse/metavar-map.hh
** \brief Declaration of parse::MetavarMap.
*/
#pragma once
#include <string>
#include <misc/map.hh>
namespace parse
{
/// A generic map of metavariables.
template <typename Data> class MetavarMap
{
public:
/// Build a map of metavariables of kind \a name.
MetavarMap(const std::string& name);
virtual ~MetavarMap();
/// Generate a (concrete syntax) Tiger statement for metavariable
/// number \a key (of kind \p Data).
std::string show(unsigned key) const;
/// Print the MetavarMap on \a ostr.
std::ostream& dump(std::ostream& ostr) const;
protected:
/// Append a metavariable to the map.
virtual std::string append_(unsigned& key, Data* data);
/// Extract a metavariable.
virtual Data* take_(unsigned key);
/// Name of the kind of variable.
const std::string name_;
/// Metavariables.
using map_type = misc::map<unsigned, Data*>;
map_type map_;
};
/// Output \a m onto \a ostr.
template <typename Data>
std::ostream& operator<<(std::ostream& ostr, const MetavarMap<Data>& m);
} // namespace parse
#include <parse/metavar-map.hxx>
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