27.istream.get.stdcxx-60.cpp

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#include <cassert>
#include <sstream>
 
int main ()
{
    // According to LWG issue 243
    // http://www.open-std.org/jtc1/sc22/wg21/docs/lwg-defects.html#243:
    //
    // "...if the sentry constructor [of an unformatted input function]
    // exits by throwing an exception or if the sentry object returns
    // false, when converted to a value of type bool, the function
    // returns without attempting to obtain any input. In either case
    // [...] unformatted input functions taking a character array of
    // non-zero size as an argument shall also store a null character
    // (using charT()) in the first location of the array."
 
    std::istringstream strm;
 
    strm.setstate (strm.failbit);
 
    char s [3] = { 'x', 'y', 'z' };
    strm.get (s, 2);
 
    assert ('\0' == s [0]);
    assert ('y' == s [1]);
    assert ('z' == s [2]);
 
    return 0;
}