[PATCH] D41748: [libcxx] [test] Fix Xxx_scan tests using nonstandard things and MSVC++ warnings

[Billy Robert O'Neal III via Phabricator via cfe-commits]

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

- These tests use function objects from functional, back_inserter from iterator, and equal from algorithm, so add those headers.
- The use of iota targeting vector<unsigned char> with an int parameter triggers warnings on MSVC++ assigning an into a unsigned char&; so change the parameter to unsigned char with a static_cast.
- Avoid naming unary_function in identity here as that is removed in '17. (This also fixes naming _VSTD, _NOEXCEPT_, and other libcxx-isms)


https://reviews.llvm.org/D41748

Files:
  test/std/numerics/numeric.ops/exclusive.scan/exclusive_scan.pass.cpp
  test/std/numerics/numeric.ops/exclusive.scan/exclusive_scan_init_op.pass.cpp
  test/std/numerics/numeric.ops/inclusive.scan/inclusive_scan.pass.cpp
  test/std/numerics/numeric.ops/inclusive.scan/inclusive_scan_op.pass.cpp
  test/std/numerics/numeric.ops/inclusive.scan/inclusive_scan_op_init.pass.cpp
  test/std/numerics/numeric.ops/transform.exclusive.scan/transform_exclusive_scan_init_bop_uop.pass.cpp
  test/std/numerics/numeric.ops/transform.inclusive.scan/transform_inclusive_scan_bop_uop.pass.cpp
  test/std/numerics/numeric.ops/transform.inclusive.scan/transform_inclusive_scan_bop_uop_init.pass.cpp

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