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/**
** \file parse/tweast.cc
** \brief Implementation of parse::Tweast.
*/
#include <sstream>
#include <boost/algorithm/string/replace.hpp>
#include <parse/tweast.hh>
namespace parse
{
unsigned Tweast::count_ = 0;
Tweast::Tweast()
: Tweast("")
{}
Tweast::Tweast(const std::string& str)
: MetavarMap<ast::Exp>::MetavarMap("exp")
, MetavarMap<ast::Var>::MetavarMap("lvalue")
, MetavarMap<ast::NameTy>::MetavarMap("namety")
, MetavarMap<ast::ChunkList>::MetavarMap("chunks")
, MetavarMap<Tweast>::MetavarMap("tweast")
, input_(str)
{}
void Tweast::flatten()
{
using tweasts_type = MetavarMap<Tweast>;
using tweasts_map_type = tweasts_type::map_type;
// Recursively flatten each Tweast metavariable.
for (const tweasts_map_type::value_type& t : tweasts_type::map_)
t.second->flatten();
// Grab each non-Tweast metavariable of Tweast metavariables, and
// renumber the metavariables.
for (const tweasts_map_type::value_type& t : tweasts_type::map_)
{
unsigned tweast_index = t.first;
Tweast& tweast = *t.second;
// Tweast input.
std::string tweast_input = tweast.input_get();
// Move metavariables to THIS and rename them.
move_metavars_<ast::Exp>(tweast, tweast_input);
move_metavars_<ast::Var>(tweast, tweast_input);
move_metavars_<ast::NameTy>(tweast, tweast_input);
move_metavars_<ast::ChunkList>(tweast, tweast_input);
// Replace the tweast metavariable reference with its input string.
std::string tweast_var = tweasts_type::show(tweast_index);
std::string input = input_.str();
boost::algorithm::replace_first(input, tweast_var, tweast_input);
input_.str(input);
}
// Delete aggregated Tweasts, and remove their associated
// metavariable from the map of Tweasts.
for (const tweasts_map_type::value_type& t : tweasts_type::map_)
delete t.second;
tweasts_type::map_.clear();
}
std::string Tweast::input_get() const { return input_.str(); }
std::ostream& Tweast::dump(std::ostream& ostr) const
{
ostr << "input = \"" << input_.str() << "\"" << misc::iendl;
MetavarMap<ast::Exp>::dump(ostr);
MetavarMap<ast::Var>::dump(ostr);
MetavarMap<ast::NameTy>::dump(ostr);
MetavarMap<ast::ChunkList>::dump(ostr);
MetavarMap<Tweast>::dump(ostr);
return ostr << misc::decendl;
}
std::ostream& operator<<(std::ostream& ostr, const Tweast& in)
{
return in.dump(ostr);
}
} // namespace parse
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