follow arduino API: pure virtual Stream::flush() moved to empty virtual Print::flush() #4029
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…al Print::flush() re fix esp8266#4018
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Looks like Print is also missing the virtual destructor... wonder why the compiler isn't warning about this. Change looks good though. |
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I guess that's because all arduino classes are generally global variables not dynamically allocated. |
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re fix #4018
::flush() declaration are now exactly the same as arduino's
flush added
flush removed