tmp/tmpl073bxkc/{from.md → to.md}
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### Inserters and extractors <a id="string.view.io">[[string.view.io]]</a>
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``` cpp
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template<class charT, class traits>
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basic_ostream<charT, traits>&
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operator<<(basic_ostream<charT, traits>& os,
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basic_string_view<charT, traits> str);
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```
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*Effects:* Behaves as a formatted output
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function ([[ostream.formatted.reqmts]]) of `os`. Forms a character
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sequence `seq`, initially consisting of the elements defined by the
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range \[`str.begin()`, `str.end()`). Determines padding for `seq` as
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described in [[ostream.formatted.reqmts]]. Then inserts `seq` as if by
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calling `os.rdbuf()->sputn(seq, n)`, where `n` is the larger of
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`os.width()` and `str.size()`; then calls `os.width(0)`.
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*Returns:* `os`
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