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minor stl caster clarifications
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@ -5,10 +5,12 @@ Automatic conversion
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====================
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When including the additional header file :file:`pybind11/stl.h`, conversions
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between ``std::vector<>``, ``std::list<>``, ``std::set<>``, and ``std::map<>``
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and the Python ``list``, ``set`` and ``dict`` data structures are automatically
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enabled. The types ``std::pair<>`` and ``std::tuple<>`` are already supported
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out of the box with just the core :file:`pybind11/pybind11.h` header.
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between ``std::vector<>``/``std::list<>``/``std::array<>``,
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``std::set<>``/``std::unordered_set<>``, and
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``std::map<>``/``std::unordered_map<>`` and the Python ``list``, ``set`` and
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``dict`` data structures are automatically enabled. The types ``std::pair<>``
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and ``std::tuple<>`` are already supported out of the box with just the core
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:file:`pybind11/pybind11.h` header.
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The major downside of these implicit conversions is that containers must be
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converted (i.e. copied) on every Python->C++ and C++->Python transition, which
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