We came across this issue in one of our applications with clang 3.5.0.
The following code compiles just fine in "C++03" mode, but fails in
"C++11" mode. Is clang right here, or is it a compiler bug? Note that
the work around (commented out below) is pretty simple and works in
both modes, but I'm not sure why...
// (works) /usr/bin/clang++ ss.C
// (fails) /usr/bin/clang++ -std=c++11 ss.C
#include <sstream>
#include <iostream>
int main()
{
std::istringstream is;
int val = 42;
// If you change the return type to "auto" you get the error message:
// error: call to implicitly-deleted copy constructor of
'std::__1::basic_istream<char>'
// but only in C++11.
bool t = (is >> val);
// This one works just fine with or without -std=c++11
// bool ok = false;
// if (is >> val)
// ok = true;
return 0;
}
--
John
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