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Avoid string copy if possible when passing a Python object to std::ostream #3042

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Jul 1, 2021
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Avoid string copy if possible when passing a Python object to std::ostream #3042

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4 changes: 4 additions & 0 deletions include/pybind11/stl.h
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Original file line number Diff line number Diff line change
Expand Up @@ -377,7 +377,11 @@ struct type_caster<std::variant<Ts...>> : variant_caster<std::variant<Ts...>> {
PYBIND11_NAMESPACE_END(detail)

inline std::ostream &operator<<(std::ostream &os, const handle &obj) {
#ifdef PYBIND11_HAS_STRING_VIEW
os << str(obj).cast<std::string_view>();
#else
os << (std::string) str(obj);
#endif
return os;
}

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