[libcxx] [test] D27014: Fix MSVC warning C4018 "signed/unsigned mismatch", part 2/12.

Add static_cast<std::size_t> when comparing int to std::size_t.

Also, include <cstddef> when it wasn't already being included.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@287822 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/algorithms/alg.sorting/alg.nth.element/nth_element_comp.pass.cpp

@@ -19,6 +19,7 @@
 #include <functional>
 #include <vector>
 #include <cassert>
+#include <cstddef>
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 #include <memory>
 
@@ -77,7 +78,7 @@ int main()
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
     std::vector<std::unique_ptr<int> > v(1000);
-    for (int i = 0; i < v.size(); ++i)
+    for (int i = 0; static_cast<std::size_t>(i) < v.size(); ++i)
         v[i].reset(new int(i));
     std::nth_element(v.begin(), v.begin() + v.size()/2, v.end(), indirect_less());
     assert(*v[v.size()/2] == v.size()/2);

test/std/algorithms/alg.sorting/alg.sort/partial.sort/partial_sort_comp.pass.cpp

@@ -19,6 +19,7 @@
 #include <vector>
 #include <functional>
 #include <cassert>
+#include <cstddef>
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 #include <memory>
 
@@ -83,10 +84,10 @@ int main()
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
     std::vector<std::unique_ptr<int> > v(1000);
-    for (int i = 0; i < v.size(); ++i)
+    for (int i = 0; static_cast<std::size_t>(i) < v.size(); ++i)
         v[i].reset(new int(i));
     std::partial_sort(v.begin(), v.begin() + v.size()/2, v.end(), indirect_less());
-    for (int i = 0; i < v.size()/2; ++i)
+    for (int i = 0; static_cast<std::size_t>(i) < v.size()/2; ++i)
         assert(*v[i] == i);
     }
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES

test/std/algorithms/alg.sorting/alg.sort/sort/sort_comp.pass.cpp

@@ -19,6 +19,7 @@
 #include <functional>
 #include <vector>
 #include <cassert>
+#include <cstddef>
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 #include <memory>
 
@@ -35,7 +36,7 @@ int main()
 {
     {
     std::vector<int> v(1000);
-    for (int i = 0; i < v.size(); ++i)
+    for (int i = 0; static_cast<std::size_t>(i) < v.size(); ++i)
         v[i] = i;
     std::sort(v.begin(), v.end(), std::greater<int>());
     std::reverse(v.begin(), v.end());
@@ -45,7 +46,7 @@ int main()
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
     std::vector<std::unique_ptr<int> > v(1000);
-    for (int i = 0; i < v.size(); ++i)
+    for (int i = 0; static_cast<std::size_t>(i) < v.size(); ++i)
         v[i].reset(new int(i));
     std::sort(v.begin(), v.end(), indirect_less());
     assert(std::is_sorted(v.begin(), v.end(), indirect_less()));

test/std/algorithms/alg.sorting/alg.sort/stable.sort/stable_sort_comp.pass.cpp

@@ -19,6 +19,7 @@
 #include <functional>
 #include <vector>
 #include <cassert>
+#include <cstddef>
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
 #include <memory>
 
@@ -71,7 +72,7 @@ int main()
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
     {
     std::vector<std::unique_ptr<int> > v(1000);
-    for (int i = 0; i < v.size(); ++i)
+    for (int i = 0; static_cast<std::size_t>(i) < v.size(); ++i)
         v[i].reset(new int(i));
     std::stable_sort(v.begin(), v.end(), indirect_less());
     assert(std::is_sorted(v.begin(), v.end(), indirect_less()));