member_swap.pass.cpp [plain text]
#include <sstream>
#include <cassert>
int main()
{
{
std::istringstream ss0(" 123 456");
std::istringstream ss(" 789 321");
ss.swap(ss0);
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == " 123 456");
int i = 0;
ss >> i;
assert(i == 123);
ss >> i;
assert(i == 456);
ss0 >> i;
assert(i == 789);
ss0 >> i;
assert(i == 321);
}
{
std::wistringstream ss0(L" 123 456");
std::wistringstream ss(L" 789 321");
ss.swap(ss0);
assert(ss.rdbuf() != 0);
assert(ss.good());
assert(ss.str() == L" 123 456");
int i = 0;
ss >> i;
assert(i == 123);
ss >> i;
assert(i == 456);
ss0 >> i;
assert(i == 789);
ss0 >> i;
assert(i == 321);
}
}