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provide << operator for optionals

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This commit is contained in:
Joe Thornber 2014-09-04 11:26:43 +01:00
parent 99d851cd29
commit 41354f10f5
1 changed files with 8 additions and 0 deletions
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8
thin-provisioning/human_readable_format.cc
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@ -26,6 +26,14 @@ using namespace thin_provisioning;
//----------------------------------------------------------------
namespace {
template <typename T>
std::ostream &operator << (ostream &out, boost::optional<T> const &maybe) {
if (maybe)
out << *maybe;
return out;
}
class hr_emitter : public emitter {
public:
hr_emitter(ostream &out)