echo.hh

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#ifndef VCSN_MISC_ECHO_HH
# define VCSN_MISC_ECHO_HH

# include <iostream>
# include <set>
# include <vector>

# define V(S)                                   \
  #S ": " << S << ' '

# define VV(S)                                                          \
  "<" #S ":" __HERE__ << '>' << S << "</" << #S << '>'

# define SHOW(S) std::cerr << S << std::endl

# define SHOWV(S) SHOW(V(S))

# define __HERE__ __FILE__ ": " << __LINE__

# define SHOWH(S) SHOW(__HERE__ << ": " << S)

namespace std
{
  template <typename T>
  ostream&
  operator<<(ostream& o, set<T>& ts)
  {
    bool first = true;
    for (const auto& t: ts)
      {
        if (!first)
          o << ' ';
        o << t;
        first = false;
      }
    return o;
  }

  template <typename T>
  ostream&
  operator<<(ostream& o, vector<T>& ts)
  {
    bool first = true;
    for (const auto& t: ts)
      {
        if (!first)
          o << ' ';
        o << t;
        first = false;
      }
    return o;
  }
}

#endif // !VCSN_MISC_ECHO_HH