From f1e473bad91ade08503be6549c2cb4f229835327 Mon Sep 17 00:00:00 2001
From: Marshall Clow <mclow.lists@gmail.com>
Date: Tue, 16 Sep 2014 20:38:11 +0000
Subject: Create a 'comma_iterator' class that overloads operator, and asserts
 when it's called. Add tests to mismatch to make sure it can't be blindsided
 by such an evil iterator. More tests for other algorithms forthcoming. Thanks
 to STL for pointing this out at CppCon and Yakov Galka for opening LWG issue
 #2133

llvm-svn: 217902
---
 .../test/algorithms/alg.nonmodifying/mismatch/mismatch.pass.cpp   | 8 ++++++++
 .../algorithms/alg.nonmodifying/mismatch/mismatch_pred.pass.cpp   | 8 ++++++++
 2 files changed, 16 insertions(+)

(limited to 'libcxx/test/algorithms')

diff --git a/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch.pass.cpp b/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch.pass.cpp
index fe678541382..78f795afae4 100644
--- a/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch.pass.cpp
+++ b/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch.pass.cpp
@@ -36,6 +36,14 @@ int main()
                             input_iterator<const int*>(ia+3),
                             input_iterator<const int*>(ib+3))));
 
+    assert(std::mismatch(comma_iterator<const int*>(ia),
+                         comma_iterator<const int*>(ia + sa),
+                         comma_iterator<const int*>(ib)) ==
+                         (std::pair<comma_iterator<const int*>,
+                                    comma_iterator<const int*> >(
+                            comma_iterator<const int*>(ia+3),
+                            comma_iterator<const int*>(ib+3))));
+
 #ifdef HAS_FOUR_ITERATOR_VERSION
     assert(std::mismatch(input_iterator<const int*>(ia),
                          input_iterator<const int*>(ia + sa),
diff --git a/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch_pred.pass.cpp b/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch_pred.pass.cpp
index 202a1b7bcb6..aeb74104bb4 100644
--- a/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch_pred.pass.cpp
+++ b/libcxx/test/algorithms/alg.nonmodifying/mismatch/mismatch_pred.pass.cpp
@@ -39,6 +39,14 @@ int main()
                                     input_iterator<const int*> >(
                             input_iterator<const int*>(ia+3),
                             input_iterator<const int*>(ib+3))));
+    assert(std::mismatch(comma_iterator<const int*>(ia),
+                         comma_iterator<const int*>(ia + sa),
+                         comma_iterator<const int*>(ib),
+                         std::equal_to<int>()) ==
+                         (std::pair<comma_iterator<const int*>,
+                                    comma_iterator<const int*> >(
+                            comma_iterator<const int*>(ia+3),
+                            comma_iterator<const int*>(ib+3))));
 #ifdef HAS_FOUR_ITERATOR_VERSION
     assert(std::mismatch(input_iterator<const int*>(ia),
                          input_iterator<const int*>(ia + sa),
-- 
cgit v1.2.3