Fix all compilation errors to be C++11 compliant

snappy.h

@@ -64,6 +64,9 @@ namespace snappy {
     // faster decompression speeds than snappy:1 and zstd:-3.
     int level = DefaultCompressionLevel();
 
+    constexpr CompressionOptions() = default;
+    constexpr CompressionOptions(int compression_level)
+        : level(compression_level) {}
     static constexpr int MinCompressionLevel() { return 1; }
     static constexpr int MaxCompressionLevel() { return 2; }
     static constexpr int DefaultCompressionLevel() { return 1; }

snappy_benchmark.cc

@@ -31,20 +31,18 @@
 #include <string>
 #include <vector>
 
-#include "snappy-test.h"
-
 #include "benchmark/benchmark.h"
-
 #include "snappy-internal.h"
 #include "snappy-sinksource.h"
+#include "snappy-test.h"
 #include "snappy.h"
 #include "snappy_test_data.h"
 
 namespace snappy {
 
 namespace {
 
-void FilesAndLevels(::testing::Benchmark* benchmark) {
+void FilesAndLevels(benchmark::internal::Benchmark* benchmark) {
   for (int i = 0; i < ARRAYSIZE(kTestDataFiles); ++i) {
     for (int level = snappy::CompressionOptions::MinCompressionLevel();
          level <= snappy::CompressionOptions::MaxCompressionLevel(); ++level) {
@@ -64,8 +62,9 @@ void BM_UFlat(benchmark::State& state) {
                        kTestDataFiles[file_index].size_limit);
 
   std::string zcontents;
-  snappy::Compress(contents.data(), contents.size(), &zcontents,
-                   snappy::CompressionOptions{/*level=*/state.range(1)});
+  snappy::Compress(
+      contents.data(), contents.size(), &zcontents,
+      snappy::CompressionOptions{/*level=*/static_cast<int>(state.range(1))});
   char* dst = new char[contents.size()];
 
   for (auto s : state) {
@@ -129,8 +128,9 @@ void BM_UValidate(benchmark::State& state) {
                        kTestDataFiles[file_index].size_limit);
 
   std::string zcontents;
-  snappy::Compress(contents.data(), contents.size(), &zcontents,
-                   snappy::CompressionOptions{/*level=*/state.range(1)});
+  snappy::Compress(
+      contents.data(), contents.size(), &zcontents,
+      snappy::CompressionOptions{/*level=*/static_cast<int>(state.range(1))});
 
   for (auto s : state) {
     CHECK(snappy::IsValidCompressedBuffer(zcontents.data(), zcontents.size()));
@@ -226,7 +226,7 @@ void BM_UIOVecSink(benchmark::State& state) {
   // Uncompress into an iovec containing ten entries.
   const int kNumEntries = 10;
   struct iovec iov[kNumEntries];
-  char *dst = new char[contents.size()];
+  char* dst = new char[contents.size()];
   size_t used_so_far = 0;
   for (int i = 0; i < kNumEntries; ++i) {
     iov[i].iov_base = dst + used_so_far;
@@ -267,8 +267,9 @@ void BM_UFlatSink(benchmark::State& state) {
                        kTestDataFiles[file_index].size_limit);
 
   std::string zcontents;
-  snappy::Compress(contents.data(), contents.size(), &zcontents,
-                   snappy::CompressionOptions{/*level=*/state.range(1)});
+  snappy::Compress(
+      contents.data(), contents.size(), &zcontents,
+      snappy::CompressionOptions{/*level=*/static_cast<int>(state.range(1))});
   char* dst = new char[contents.size()];
 
   for (auto s : state) {
@@ -323,7 +324,7 @@ BENCHMARK(BM_ZFlat)->Apply(FilesAndLevels);
 
 void BM_ZFlatAll(benchmark::State& state) {
   const int num_files = ARRAYSIZE(kTestDataFiles);
-  int/*level=*/state.range(0);
+  int level = state.range(0);
 
   std::vector<std::string> contents(num_files);
   std::vector<char*> dst(num_files);