ECHOE

Undocumented in source but is binding to C. You might be able to learn more by searching the web for its name.
  1. auto ECHOE;
  2. auto ECHOE;
  3. auto ECHOE;
  4. auto ECHOE;
    version(!OSX && !linux && !FreeBSD && solaris)
    extern (C) const
    auto ECHOE = octal!20;

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