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For clearing the contents of a stringstream , using: m. str("");
For best results, spray the surface of the metal with several sprays of vinegar, and then pull out another clean microfiber cloth to wipe the metal. The vinegar will clean the surface and remove all traces of other compounds and cleaners. Once the stainless steel is clean and dry, start polishing.
myStream. rdbuf()->in_avail() can be used to get the count of available characters ready to be read in from a stringstream , you can use that to check if your stringstream is "empty." I'm assuming you're not actually trying to check for the value null .
You can't return a stream from a function by value, because that implies you'd have to copy the stream.
Typically to 'reset' a stringstream you need to both reset the underlying sequence to an empty string with str and to clear any fail and eof flags with clear.
parser.str( std::string() );
parser.clear();
Typically what happens is that the first >> reaches the end of the string and sets the eof bit, although it successfully parses the first short. Operations on the stream after this immediately fail because the stream's eof bit is still set.
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