https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82502
Bug ID: 82502
Summary: Cannot roundtrip / stream-read a hexfloat double.
Product: gcc
Version: 6.4.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: libstdc++
Assignee: unassigned at gcc dot gnu.org
Reporter: maxim.yegorushkin at gmail dot com
Target Milestone: ---
The following code successfully outputs double's in hexfloat format, but it
cannot read them back:
#include <sstream>
#include <iostream>
#include <iomanip>
int main() {
std::cout << "Writing:\n";
std::stringstream ss;
ss << std::hexfloat << 1 << '\n' << 2 << '\n' << 1.234 << '\n' << 5.678
<< '\n';
std::cout << ss.str() << "Reading:\n";
ss >> std::hexfloat;
for(double d; ss >> d;)
std::cout << d << '\n';
}
It outputs:
Writing:
1
2
0x1.3be76c8b43958p+0
0x1.6b645a1cac083p+2
Reading:
1
2
0
Looks like this issue is related to
https://cplusplus.github.io/LWG/lwg-active.html#2381
