LWG4083 views::as_rvalue should reject non-input ranges

Author: burblebee

source/ranges.tex

@@ -4515,7 +4515,9 @@
 The expression \tcode{views::as_rvalue(E)} is expression-equivalent to:
 \begin{itemize}
 \item
-\tcode{views::all(E)} if \tcode{\libconcept{same_as}<range_rvalue_reference_t<T>, range_reference_t<T>>} is \tcode{true}.
+\tcode{views::all(E)} if
+\tcode{T} models \libconcept{input_range} and
+\tcode{\libconcept{same_as}<range_rvalue_reference_t<T>, range_reference_t<T>>} is \tcode{true}.
 \item
 Otherwise, \tcode{as_rvalue_view(E)}.
 \end{itemize}