Fix Clang-Tidy warnings readability-else-after-return (#1528)

src/benchmark.cc

@@ -410,14 +410,15 @@ std::unique_ptr<BenchmarkReporter> CreateReporter(
   typedef std::unique_ptr<BenchmarkReporter> PtrType;
   if (name == "console") {
     return PtrType(new ConsoleReporter(output_opts));
-  } else if (name == "json") {
-    return PtrType(new JSONReporter());
-  } else if (name == "csv") {
-    return PtrType(new CSVReporter());
-  } else {
-    std::cerr << "Unexpected format: '" << name << "'\n";
-    std::exit(1);
   }
+  if (name == "json") {
+    return PtrType(new JSONReporter());
+  }
+  if (name == "csv") {
+    return PtrType(new CSVReporter());
+  }
+  std::cerr << "Unexpected format: '" << name << "'\n";
+  std::exit(1);
 }
 
 BENCHMARK_RESTORE_DEPRECATED_WARNING
@@ -586,13 +587,17 @@ void PrintUsageAndExit() {
 void SetDefaultTimeUnitFromFlag(const std::string& time_unit_flag) {
   if (time_unit_flag == "s") {
     return SetDefaultTimeUnit(kSecond);
-  } else if (time_unit_flag == "ms") {
+  }
+  if (time_unit_flag == "ms") {
     return SetDefaultTimeUnit(kMillisecond);
-  } else if (time_unit_flag == "us") {
+  }
+  if (time_unit_flag == "us") {
     return SetDefaultTimeUnit(kMicrosecond);
-  } else if (time_unit_flag == "ns") {
+  }
+  if (time_unit_flag == "ns") {
     return SetDefaultTimeUnit(kNanosecond);
-  } else if (!time_unit_flag.empty()) {
+  }
+  if (!time_unit_flag.empty()) {
     PrintUsageAndExit();
   }
 }

src/colorprint.cc

@@ -96,18 +96,18 @@ std::string FormatString(const char* msg, va_list args) {
   // currently there is no error handling for failure, so this is hack.
   BM_CHECK(ret >= 0);
 
-  if (ret == 0)  // handle empty expansion
+  if (ret == 0) {  // handle empty expansion
     return {};
-  else if (static_cast<size_t>(ret) < size)
-    return local_buff;
-  else {
-    // we did not provide a long enough buffer on our first attempt.
-    size = static_cast<size_t>(ret) + 1;  // + 1 for the null byte
-    std::unique_ptr<char[]> buff(new char[size]);
-    ret = vsnprintf(buff.get(), size, msg, args);
-    BM_CHECK(ret > 0 && (static_cast<size_t>(ret)) < size);
-    return buff.get();
   }
+  if (static_cast<size_t>(ret) < size) {
+    return local_buff;
+  }
+  // we did not provide a long enough buffer on our first attempt.
+  size = static_cast<size_t>(ret) + 1;  // + 1 for the null byte
+  std::unique_ptr<char[]> buff(new char[size]);
+  ret = vsnprintf(buff.get(), size, msg, args);
+  BM_CHECK(ret > 0 && (static_cast<size_t>(ret)) < size);
+  return buff.get();
 }
 
 std::string FormatString(const char* msg, ...) {

src/commandlineflags.cc

@@ -284,14 +284,15 @@ bool IsTruthyFlagValue(const std::string& value) {
     char v = value[0];
     return isalnum(v) &&
            !(v == '0' || v == 'f' || v == 'F' || v == 'n' || v == 'N');
-  } else if (!value.empty()) {
+  }
+  if (!value.empty()) {
     std::string value_lower(value);
     std::transform(value_lower.begin(), value_lower.end(), value_lower.begin(),
                    [](char c) { return static_cast<char>(::tolower(c)); });
     return !(value_lower == "false" || value_lower == "no" ||
              value_lower == "off");
-  } else
-    return true;
+  }
+  return true;
 }
 
 }  // end namespace benchmark

src/string_util.cc

@@ -94,10 +94,10 @@ std::string ExponentToPrefix(int64_t exponent, bool iec) {
 
   const char* array =
       (exponent > 0 ? (iec ? kBigIECUnits : kBigSIUnits) : kSmallSIUnits);
-  if (iec)
+  if (iec) {
     return array[index] + std::string("i");
-  else
-    return std::string(1, array[index]);
+  }
+  return std::string(1, array[index]);
 }
 
 std::string ToBinaryStringFullySpecified(double value, double threshold,

test/output_test_helper.cc

@@ -248,9 +248,8 @@ void ResultsChecker::CheckResults(std::stringstream& output) {
       if (!p.regex->Match(r.name)) {
         BM_VLOG(2) << p.regex_str << " is not matched by " << r.name << "\n";
         continue;
-      } else {
-        BM_VLOG(2) << p.regex_str << " is matched by " << r.name << "\n";
       }
+      BM_VLOG(2) << p.regex_str << " is matched by " << r.name << "\n";
       BM_VLOG(1) << "Checking results of " << r.name << ": ... \n";
       p.fn(r);
       BM_VLOG(1) << "Checking results of " << r.name << ": OK.\n";
@@ -328,16 +327,18 @@ double Results::GetTime(BenchmarkTime which) const {
   BM_CHECK(unit);
   if (*unit == "ns") {
     return val * 1.e-9;
-  } else if (*unit == "us") {
-    return val * 1.e-6;
-  } else if (*unit == "ms") {
-    return val * 1.e-3;
-  } else if (*unit == "s") {
-    return val;
-  } else {
-    BM_CHECK(1 == 0) << "unknown time unit: " << *unit;
-    return 0;
   }
+  if (*unit == "us") {
+    return val * 1.e-6;
+  }
+  if (*unit == "ms") {
+    return val * 1.e-3;
+  }
+  if (*unit == "s") {
+    return val;
+  }
+  BM_CHECK(1 == 0) << "unknown time unit: " << *unit;
+  return 0;
 }
 
 // ========================================================================= //