How to clear stringstream?

c++ stringstream
There is nothing we can do picture There is nothing we can do · May 17, 2010 · Viewed 84.4k times · Source 
stringstream parser;

parser << 5;
short top = 0;
parser >> top;
parser.str(""); //HERE I'M RESETTING parser

parser << 6; //DOESN'T PUT 6 INTO parser
short bottom = 0;
parser >> bottom;

Why doesn't it work?

Answer

CB Bailey picture CB Bailey · May 17, 2010

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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