Function isBreakableAfter

Bcore/src/main/cpp/Dobby/tests/catch.hpp:5073–5076

  return chars.find(c) != std::string::npos;
}
inline auto isBreakableAfter(char c) -> bool {
  static std::string chars = "])}>.,:;*+-=&/\\";
  return chars.find(c) != std::string::npos;
}

class Columns;