[libcxx] Add missing includes in tests

A bunch of unordered containers tests call library functions but don't directly
include the corresponding header files:

- fabs() (defined in <cmath> which is not included);
- is_permutation() (defined in <algorithm> which is not included);
- next() (defined in <iterator> which is not included).
- As a result, these tests won't compile against some conformant libraries.

Reviewed as https://reviews.llvm.org/D54643.
Thanks to Andrey Maksimov for the patch.

git-svn-id: https://llvm.org/svn/llvm-project/libcxx/trunk@347085 91177308-0d34-0410-b5e6-96231b3b80d8

test/std/containers/unord/unord.map/unord.map.cnstr/assign_init.pass.cpp

@@ -21,6 +21,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "../../../test_compare.h"

test/std/containers/unord/unord.map/unord.map.cnstr/assign_move.pass.cpp

@@ -21,6 +21,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.map/unord.map.cnstr/init.pass.cpp

@@ -21,6 +21,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.map/unord.map.cnstr/range.pass.cpp

@@ -20,6 +20,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multimap/unord.multimap.cnstr/assign_copy.pass.cpp

@@ -19,6 +19,8 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
+#include <algorithm>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multimap/unord.multimap.cnstr/assign_init.pass.cpp

@@ -21,6 +21,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "../../../test_compare.h"

test/std/containers/unord/unord.multimap/unord.multimap.cnstr/assign_move.pass.cpp

@@ -21,6 +21,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multimap/unord.multimap.cnstr/init.pass.cpp

@@ -21,6 +21,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multimap/unord.multimap.cnstr/range.pass.cpp

@@ -20,6 +20,7 @@
 #include <string>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multiset/erase_range.pass.cpp

@@ -17,6 +17,7 @@
 
 #include <unordered_set>
 #include <cassert>
+#include <iterator>
 
 #include "min_allocator.h"
 

test/std/containers/unord/unord.multiset/unord.multiset.cnstr/assign_copy.pass.cpp

@@ -16,8 +16,10 @@
 // unordered_multiset& operator=(const unordered_multiset& u);
 
 #include <unordered_set>
+#include <algorithm>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multiset/unord.multiset.cnstr/assign_init.pass.cpp

@@ -20,6 +20,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "../../../test_compare.h"

test/std/containers/unord/unord.multiset/unord.multiset.cnstr/assign_move.pass.cpp

@@ -20,6 +20,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multiset/unord.multiset.cnstr/init.pass.cpp

@@ -20,6 +20,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.multiset/unord.multiset.cnstr/range.pass.cpp

@@ -19,6 +19,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.set/erase_range.pass.cpp

@@ -16,6 +16,7 @@
 // iterator erase(const_iterator first, const_iterator last)
 
 #include <unordered_set>
+#include <algorithm>
 #include <cassert>
 
 #include "min_allocator.h"

test/std/containers/unord/unord.set/unord.set.cnstr/assign_copy.pass.cpp

@@ -16,8 +16,10 @@
 // unordered_set& operator=(const unordered_set& u);
 
 #include <unordered_set>
+#include <algorithm>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.set/unord.set.cnstr/assign_init.pass.cpp

@@ -20,6 +20,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "../../../test_compare.h"

test/std/containers/unord/unord.set/unord.set.cnstr/assign_move.pass.cpp

@@ -20,6 +20,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.set/unord.set.cnstr/init.pass.cpp

@@ -20,6 +20,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"

test/std/containers/unord/unord.set/unord.set.cnstr/range.pass.cpp

@@ -19,6 +19,7 @@
 #include <unordered_set>
 #include <cassert>
 #include <cfloat>
+#include <cmath>
 #include <cstddef>
 
 #include "test_macros.h"