Use "static_assert" in lieu of "COMPILE_ASSERT" in courgete

courgette/difference_estimator.cc

 // Copyright (c) 2009 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // We want to measure the similarity of two sequences of bytes as a surrogate
 // for measuring how well a second sequence will compress differentially to the
 // first sequence.
 
 #include "courgette/difference_estimator.h"
 
 #include "base/containers/hash_tables.h"
 
 namespace courgette {
 
 // Our difference measure is the number of k-tuples that occur in Subject that
 // don't occur in Base.
 const int kTupleSize = 4;
 
 namespace {
 
-COMPILE_ASSERT(kTupleSize >= 4 && kTupleSize <= 8, kTupleSize_between_4_and_8);
+static_assert(kTupleSize >= 4 && kTupleSize <= 8,
+              "kTupleSize should be between 4 and 8");
 
 size_t HashTuple(const uint8* source) {
   size_t hash1 = *reinterpret_cast<const uint32*>(source);
   size_t hash2 = *reinterpret_cast<const uint32*>(source + kTupleSize - 4);
   size_t hash = ((hash1 * 17 + hash2 * 37) + (hash1 >> 17)) ^ (hash2 >> 23);
   return hash;
 }
 
 bool RegionsEqual(const Region& a, const Region& b) {
   if (a.length() != b.length())
@@ skipping 77 matching lines @@
 
   if (mismatches == 0) {
     if (RegionsEqual(base->region(), subject->region()))
       return 0;
   }
   ++mismatches;  // Guarantee not zero.
   return mismatches;
 }
 
 }  // namespace