From bd3306aecb3a15e8967143b8cdbbccf2b1b19b74 Mon Sep 17 00:00:00 2001
From: patrick <patrick@openbsd.org>
Date: Sat, 14 Jan 2017 19:55:43 +0000
Subject: Import LLVM 3.9.1 including clang and lld.

---
 gnu/llvm/unittests/Support/IteratorTest.cpp | 87 +++++++++++++++++++++++++++++
 1 file changed, 87 insertions(+)

(limited to 'gnu/llvm/unittests/Support/IteratorTest.cpp')

diff --git a/gnu/llvm/unittests/Support/IteratorTest.cpp b/gnu/llvm/unittests/Support/IteratorTest.cpp
index 83848328c0c..63dfa2a9d01 100644
--- a/gnu/llvm/unittests/Support/IteratorTest.cpp
+++ b/gnu/llvm/unittests/Support/IteratorTest.cpp
@@ -16,6 +16,24 @@ using namespace llvm;
 
 namespace {
 
+template <int> struct Shadow;
+
+struct WeirdIter : std::iterator<std::input_iterator_tag, Shadow<0>, Shadow<1>,
+                                 Shadow<2>, Shadow<3>> {};
+
+struct AdaptedIter : iterator_adaptor_base<AdaptedIter, WeirdIter> {};
+
+// Test that iterator_adaptor_base forwards typedefs, if value_type is
+// unchanged.
+static_assert(std::is_same<typename AdaptedIter::value_type, Shadow<0>>::value,
+              "");
+static_assert(
+    std::is_same<typename AdaptedIter::difference_type, Shadow<1>>::value, "");
+static_assert(std::is_same<typename AdaptedIter::pointer, Shadow<2>>::value,
+              "");
+static_assert(std::is_same<typename AdaptedIter::reference, Shadow<3>>::value,
+              "");
+
 TEST(PointeeIteratorTest, Basic) {
   int arr[4] = { 1, 2, 3, 4 };
   SmallVector<int *, 4> V;
@@ -98,4 +116,73 @@ TEST(PointeeIteratorTest, SmartPointer) {
   EXPECT_EQ(End, I);
 }
 
+TEST(FilterIteratorTest, Lambda) {
+  auto IsOdd = [](int N) { return N % 2 == 1; };
+  int A[] = {0, 1, 2, 3, 4, 5, 6};
+  auto Range = make_filter_range(A, IsOdd);
+  SmallVector<int, 3> Actual(Range.begin(), Range.end());
+  EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
+}
+
+TEST(FilterIteratorTest, CallableObject) {
+  int Counter = 0;
+  struct Callable {
+    int &Counter;
+
+    Callable(int &Counter) : Counter(Counter) {}
+
+    bool operator()(int N) {
+      Counter++;
+      return N % 2 == 1;
+    }
+  };
+  Callable IsOdd(Counter);
+  int A[] = {0, 1, 2, 3, 4, 5, 6};
+  auto Range = make_filter_range(A, IsOdd);
+  EXPECT_EQ(2, Counter);
+  SmallVector<int, 3> Actual(Range.begin(), Range.end());
+  EXPECT_GE(Counter, 7);
+  EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
+}
+
+TEST(FilterIteratorTest, FunctionPointer) {
+  bool (*IsOdd)(int) = [](int N) { return N % 2 == 1; };
+  int A[] = {0, 1, 2, 3, 4, 5, 6};
+  auto Range = make_filter_range(A, IsOdd);
+  SmallVector<int, 3> Actual(Range.begin(), Range.end());
+  EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
+}
+
+TEST(FilterIteratorTest, Composition) {
+  auto IsOdd = [](int N) { return N % 2 == 1; };
+  std::unique_ptr<int> A[] = {make_unique<int>(0), make_unique<int>(1),
+                              make_unique<int>(2), make_unique<int>(3),
+                              make_unique<int>(4), make_unique<int>(5),
+                              make_unique<int>(6)};
+  using PointeeIterator = pointee_iterator<std::unique_ptr<int> *>;
+  auto Range = make_filter_range(
+      make_range(PointeeIterator(std::begin(A)), PointeeIterator(std::end(A))),
+      IsOdd);
+  SmallVector<int, 3> Actual(Range.begin(), Range.end());
+  EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
+}
+
+TEST(FilterIteratorTest, InputIterator) {
+  struct InputIterator
+      : iterator_adaptor_base<InputIterator, int *, std::input_iterator_tag> {
+    using BaseT =
+        iterator_adaptor_base<InputIterator, int *, std::input_iterator_tag>;
+
+    InputIterator(int *It) : BaseT(It) {}
+  };
+
+  auto IsOdd = [](int N) { return N % 2 == 1; };
+  int A[] = {0, 1, 2, 3, 4, 5, 6};
+  auto Range = make_filter_range(
+      make_range(InputIterator(std::begin(A)), InputIterator(std::end(A))),
+      IsOdd);
+  SmallVector<int, 3> Actual(Range.begin(), Range.end());
+  EXPECT_EQ((SmallVector<int, 3>{1, 3, 5}), Actual);
+}
+
 } // anonymous namespace
-- 
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