SyscallIterator: support C++11 range-based for loops

sandbox/linux/seccomp-bpf/syscall_iterator_unittest.cc

Index: sandbox/linux/seccomp-bpf/syscall_iterator_unittest.cc
diff --git a/sandbox/linux/seccomp-bpf/syscall_iterator_unittest.cc b/sandbox/linux/seccomp-bpf/syscall_iterator_unittest.cc
index b01bfc65664906efaddfa6a8c7abbfe469698279..fdb504966b1bbe5ddb614003232bf1ebe99af6b0 100644
--- a/sandbox/linux/seccomp-bpf/syscall_iterator_unittest.cc
+++ b/sandbox/linux/seccomp-bpf/syscall_iterator_unittest.cc
@@ -13,18 +13,16 @@ namespace sandbox {
 
 namespace {
 
-const bool kFalseTrue[] = {false, true};
+const SyscallSet kSyscallSets[] = {SyscallSet::ALL, SyscallSet::INVALID_ONLY};
 
 SANDBOX_TEST(SyscallIterator, Monotonous) {
-  for (bool invalid_only : kFalseTrue) {
+  for (const SyscallSet& set : kSyscallSets) {
     uint32_t prev = 0;
     bool have_prev = false;
-    for (SyscallIterator iter(invalid_only); !iter.Done();) {
-      uint32_t sysnum = iter.Next();
-
+    for (uint32_t sysnum : set) {
       if (have_prev) {
         SANDBOX_ASSERT(sysnum > prev);
-      } else if (!invalid_only) {
+      } else if (set == SyscallSet::ALL) {
         // The iterator should start at 0.
         SANDBOX_ASSERT(sysnum == 0);
       }
@@ -44,8 +42,7 @@ SANDBOX_TEST(SyscallIterator, Monotonous) {
 void AssertRange(uint32_t min, uint32_t max) {
   SANDBOX_ASSERT(min < max);
   uint32_t prev = min - 1;
-  for (SyscallIterator iter(false); !iter.Done();) {
-    uint32_t sysnum = iter.Next();
+  for (uint32_t sysnum : SyscallSet::ALL) {
     if (sysnum >= min && sysnum <= max) {
       SANDBOX_ASSERT(prev == sysnum - 1);
       prev = sysnum;
@@ -80,10 +77,9 @@ SANDBOX_TEST(SyscallIterator, InvalidSyscalls) {
     0xFFFFFFFFu,
   };
 
-  for (bool invalid_only : kFalseTrue) {
+  for (const SyscallSet& set : kSyscallSets) {
     size_t i = 0;
-    for (SyscallIterator iter(invalid_only); !iter.Done();) {
-      uint32_t sysnum = iter.Next();
+    for (uint32_t sysnum : set) {
       if (!SyscallIterator::IsValid(sysnum)) {
         SANDBOX_ASSERT(i < arraysize(kExpected));
         SANDBOX_ASSERT(kExpected[i] == sysnum);
@@ -94,6 +90,12 @@ SANDBOX_TEST(SyscallIterator, InvalidSyscalls) {
   }
 }
 
+SANDBOX_TEST(SyscallIterator, InvalidOnlyIsOnlyInvalid) {
+  for (uint32_t sysnum : SyscallSet::INVALID_ONLY) {
+    SANDBOX_ASSERT(!SyscallIterator::IsValid(sysnum));
+  }
+}
+
 }  // namespace
 
 }  // namespace sandbox