[all-commits] [llvm/llvm-project] 65fcea: [libc++] Adds missing forward_list merge tests.

[mordante via All-commits]

  Branch: refs/heads/main
  Home:   https://github.com/llvm/llvm-project
  Commit: 65fceaebc79112d755cdda4a58828fdd9318e45f
      https://github.com/llvm/llvm-project/commit/65fceaebc79112d755cdda4a58828fdd9318e45f
  Author: Mark de Wever <koraq at xs4all.nl>
  Date:   2021-11-09 (Tue, 09 Nov 2021)

  Changed paths:
    R libcxx/test/std/containers/sequences/forwardlist/forwardlist.ops/merge.pass.cpp
    A libcxx/test/std/containers/sequences/forwardlist/forwardlist.ops/merge_lvalue.pass.cpp
    A libcxx/test/std/containers/sequences/forwardlist/forwardlist.ops/merge_lvalue_pred.pass.cpp
    R libcxx/test/std/containers/sequences/forwardlist/forwardlist.ops/merge_pred.pass.cpp
    A libcxx/test/std/containers/sequences/forwardlist/forwardlist.ops/merge_rvalue.pass.cpp
    A libcxx/test/std/containers/sequences/forwardlist/forwardlist.ops/merge_rvalue_pred.pass.cpp

  Log Message:
  -----------
  [libc++] Adds missing forward_list merge tests.

During the review of D112660 it turned out the tests for
`std::forward_list::merge` are incomplete.

Adds tests for the rvalue reference overloads. The tests are extended to
better test the Effects [forward.list.ops]/25 and Remarks
[forward.list.ops]/27 of the function:
- x is empty after the merge.
- Pointers and references to the moved elements of x now refer to those
  same elements but as members of *this.
- Iterators referring to the moved elements will continue to refer to
  their elements, but they now behave as iterators into *this, not into x.
- The algorithm is stable.

Reviewed By: Quuxplusone, #libc, ldionne

Differential Revision: https://reviews.llvm.org/D113364