Implement C++17 std::sample.

This patch implements the std::sample function added to C++17 from LFTS. It
also removes the std::experimental::sample implementation which now forwards
to std::sample.

llvm-svn: 279948

1 files changed, 5 insertions, 3 deletions

diff --git a/libcxx/test/std/experimental/algorithms/alg.random.sample/sample.fail.cpp b/libcxx/test/std/experimental/algorithms/alg.random.sample/sample.fail.cpp
index b27135ac7c0..85ff8e15d16 100644
--- a/libcxx/test/std/experimental/algorithms/alg.random.sample/sample.fail.cpp
+++ b/libcxx/test/std/experimental/algorithms/alg.random.sample/sample.fail.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// UNSUPPORTED: c++98, c++03
+
 // <algorithm>
 
 // template <class PopulationIterator, class SampleIterator, class Distance,
@@ -32,8 +34,8 @@ template <class PopulationIterator, class SampleIterator> void test() {
 }
 
 int main() {
-  // expected-error@experimental/algorithm:* {{static_assert failed "SampleIterator must meet the requirements of RandomAccessIterator"}}
-  // expected-error@experimental/algorithm:* 2 {{does not provide a subscript operator}}
-  // expected-error@experimental/algorithm:* {{invalid operands}}
+  // expected-error@algorithm:* {{static_assert failed "SampleIterator must meet the requirements of RandomAccessIterator"}}
+  // expected-error@algorithm:* 2 {{does not provide a subscript operator}}
+  // expected-error@algorithm:* {{invalid operands}}
   test<input_iterator<int *>, output_iterator<int *> >();
 }