Default enable precision_preserving_double_format.

PiperOrigin-RevId: 871973805

Author: jnthntatum

conformance/BUILD

@@ -196,6 +196,9 @@ _TESTS_TO_SKIP_MODERN = [
     # configured timezone database.
     "timestamps/timestamp_selectors_tz/getDayOfMonth_name_pos",
     "timestamps/timestamp_selectors_tz/getDayOfYear",
+    # These depend on using charconv (or equivalent) to format doubles with shortest possible
+    # precision to preserve value. Not available on older compilers.
+    "conversions/string/double_hard",
 ]
 
 _TESTS_TO_SKIP_MODERN_DASHBOARD = [
@@ -246,6 +249,9 @@ _TESTS_TO_SKIP_LEGACY = [
     # configured timezone database.
     "timestamps/timestamp_selectors_tz/getDayOfMonth_name_pos",
     "timestamps/timestamp_selectors_tz/getDayOfYear",
+    # These depend on using charconv (or equivalent) to format doubles with shortest possible
+    # precision to preserve value. Not available on older compilers.
+    "conversions/string/double_hard",
 
     # cel.@block
     "block_ext/basic/optional_list",

eval/public/cel_options.h

@@ -211,7 +211,7 @@ struct InterpreterOptions {
   //
   // Otherwise, will fall back to formatting with the worst-case required
   // precision.
-  bool enable_precision_preserving_double_format = false;
+  bool enable_precision_preserving_double_format = true;
 };
 // LINT.ThenChange(//depot/google3/runtime/runtime_options.h)
 

runtime/runtime_options.h

@@ -181,7 +181,7 @@ struct RuntimeOptions {
   // precision.
   //
   // If disabled, will use the legacy behavior of rounding to 6 decimal places.
-  bool enable_precision_preserving_double_format = false;
+  bool enable_precision_preserving_double_format = true;
 };
 // LINT.ThenChange(//depot/google3/eval/public/cel_options.h)