cppdraft_translate/cppdraft/range/as/rvalue/overview.md

[range.as.rvalue.overview]

25 Ranges library [ranges]

25.7 Range adaptors [range.adaptors]

25.7.7 As rvalue view [range.as.rvalue]

25.7.7.1 Overview [range.as.rvalue.overview]

1

#

as_rvalue_view presents a view of an underlying sequence with the same behavior as the underlying sequence except that its elements are rvalues.

Some generic algorithms can be called with an as_rvalue_view to replace copying with moving.

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The name views​::​as_rvalue denotes a range adaptor object ([range.adaptor.object]).

Let E be an expression and let T be decltype((E)).

The expression views​::​as_rvalue(E) is expression-equivalent to:

• (2.1)

  views​::​all(E) ifT models input_range andsame_as<range_rvalue_reference_t, range_reference_t> is true.

• (2.2)

  Otherwise, as_rvalue_view(E).

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[Example 1: vector words = {"the", "quick", "brown", "fox", "ate", "a", "pterodactyl"}; vector new_words; ranges::copy(words | views::as_rvalue, back_inserter(new_words)); // moves each string from words into new_words — end example]