[PATCH] D41992: [libcxx] Avoid spurious construction of valarray elements

[Mikhail Maltsev via Phabricator via cfe-commits]

miyuki created this revision.
miyuki added reviewers: EricWF, mclow.lists.

Currently libc++ implements some operations on valarray by using the
resize method. This method has a parameter with a default value.
Because of this, valarray may spuriously construct and destruct
objects of valarray's element type.

      

This patch fixes this issue and adds corresponding test cases.


https://reviews.llvm.org/D41992

Files:
  include/valarray
  test/std/numerics/numarray/template.valarray/valarray.assign/copy_assign.pass.cpp
  test/std/numerics/numarray/template.valarray/valarray.assign/initializer_list_assign.pass.cpp
  test/std/numerics/numarray/template.valarray/valarray.cons/default.pass.cpp
  test/std/numerics/numarray/template.valarray/valarray.cons/size.pass.cpp

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