Fix double-promotion warnings in AppropriateResolution()

When -Wdouble-promotion is enabled, the templatized function AppropriateResolution fails to compile since its float instantiation promotes floats to doubles when doing arithmetic and comparisons. Add static casts to resolve these errors.

PiperOrigin-RevId: 600776333
Change-Id: Ia530b4bbca6ddce27caf0a817196d87efef711cb

Author: Abseil Team

googletest/include/gtest/gtest-printers.h

@@ -124,7 +124,7 @@
 
 #if GTEST_INTERNAL_HAS_STD_SPAN
 #include <span>  // NOLINT
-#endif  // GTEST_INTERNAL_HAS_STD_SPAN
+#endif           // GTEST_INTERNAL_HAS_STD_SPAN
 
 namespace testing {
 
@@ -241,8 +241,8 @@ struct StreamPrinter {
   // ADL (possibly involving implicit conversions).
   // (Use SFINAE via return type, because it seems GCC < 12 doesn't handle name
   // lookup properly when we do it in the template parameter list.)
-  static auto PrintValue(const T& value, ::std::ostream* os)
-      -> decltype((void)(*os << value)) {
+  static auto PrintValue(const T& value,
+                         ::std::ostream* os) -> decltype((void)(*os << value)) {
     // Call streaming operator found by ADL, possibly with implicit conversions
     // of the arguments.
     *os << value;
@@ -558,43 +558,50 @@ int AppropriateResolution(FloatType val) {
 #endif
   if (val < 1000000) {
     FloatType mulfor6 = 1e10;
-    if (val >= 100000.0) {  // 100,000 to 999,999
+    // Without these static casts, the template instantiation for float would
+    // fail to compile when -Wdouble-promotion is enabled, as the arithmetic and
+    // comparison logic would promote floats to doubles.
+    if (val >= static_cast<FloatType>(100000.0)) {  // 100,000 to 999,999
       mulfor6 = 1.0;
-    } else if (val >= 10000.0) {
+    } else if (val >= static_cast<FloatType>(10000.0)) {
       mulfor6 = 1e1;
-    } else if (val >= 1000.0) {
+    } else if (val >= static_cast<FloatType>(1000.0)) {
       mulfor6 = 1e2;
-    } else if (val >= 100.0) {
+    } else if (val >= static_cast<FloatType>(100.0)) {
       mulfor6 = 1e3;
-    } else if (val >= 10.0) {
+    } else if (val >= static_cast<FloatType>(10.0)) {
       mulfor6 = 1e4;
-    } else if (val >= 1.0) {
+    } else if (val >= static_cast<FloatType>(1.0)) {
       mulfor6 = 1e5;
-    } else if (val >= 0.1) {
+    } else if (val >= static_cast<FloatType>(0.1)) {
       mulfor6 = 1e6;
-    } else if (val >= 0.01) {
+    } else if (val >= static_cast<FloatType>(0.01)) {
       mulfor6 = 1e7;
-    } else if (val >= 0.001) {
+    } else if (val >= static_cast<FloatType>(0.001)) {
       mulfor6 = 1e8;
-    } else if (val >= 0.0001) {
+    } else if (val >= static_cast<FloatType>(0.0001)) {
       mulfor6 = 1e9;
     }
-    if (static_cast<FloatType>(static_cast<int32_t>(val * mulfor6 + 0.5)) /
+    if (static_cast<FloatType>(static_cast<int32_t>(
+            val * mulfor6 + (static_cast<FloatType>(0.5)))) /
             mulfor6 ==
         val)
       return 6;
-  } else if (val < 1e10) {
-    FloatType divfor6 = 1.0;
-    if (val >= 1e9) {  // 1,000,000,000 to 9,999,999,999
+  } else if (val < static_cast<FloatType>(1e10)) {
+    FloatType divfor6 = static_cast<FloatType>(1.0);
+    if (val >= static_cast<FloatType>(1e9)) {  // 1,000,000,000 to 9,999,999,999
       divfor6 = 10000;
-    } else if (val >= 1e8) {  // 100,000,000 to 999,999,999
+    } else if (val >=
+               static_cast<FloatType>(1e8)) {  // 100,000,000 to 999,999,999
       divfor6 = 1000;
-    } else if (val >= 1e7) {  // 10,000,000 to 99,999,999
+    } else if (val >=
+               static_cast<FloatType>(1e7)) {  // 10,000,000 to 99,999,999
       divfor6 = 100;
-    } else if (val >= 1e6) {  // 1,000,000 to 9,999,999
+    } else if (val >= static_cast<FloatType>(1e6)) {  // 1,000,000 to 9,999,999
       divfor6 = 10;
     }
-    if (static_cast<FloatType>(static_cast<int32_t>(val / divfor6 + 0.5)) *
+    if (static_cast<FloatType>(static_cast<int32_t>(
+            val / divfor6 + (static_cast<FloatType>(0.5)))) *
             divfor6 ==
         val)
       return 6;