Use max_digits10 in dump_float for float->text->float round-trip

nlohmann · Jan 15, 2018 · 9b9919d · 9b9919d
1 parent 810f81b
commit 9b9919d
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Showing 2 changed files with 4 additions and 4 deletions.
diff --git a/develop/detail/serializer.hpp b/develop/detail/serializer.hpp
@@ -665,8 +665,8 @@ class serializer
 
     void dump_float(number_float_t x, std::false_type /*is_ieee_single_or_double*/)
     {
-        // get number of digits for a text -> float -> text round-trip
-        static constexpr auto d = std::numeric_limits<number_float_t>::digits10;
+        // get number of digits for a float -> text -> float round-trip
+        static constexpr auto d = std::numeric_limits<number_float_t>::max_digits10;
 
         // the actual conversion
         std::ptrdiff_t len = snprintf(number_buffer.data(), number_buffer.size(), "%.*g", d, x);

diff --git a/src/json.hpp b/src/json.hpp
@@ -8136,8 +8136,8 @@ class serializer
 
     void dump_float(number_float_t x, std::false_type /*is_ieee_single_or_double*/)
     {
-        // get number of digits for a text -> float -> text round-trip
-        static constexpr auto d = std::numeric_limits<number_float_t>::digits10;
+        // get number of digits for a float -> text -> float round-trip
+        static constexpr auto d = std::numeric_limits<number_float_t>::max_digits10;
 
         // the actual conversion
         std::ptrdiff_t len = snprintf(number_buffer.data(), number_buffer.size(), "%.*g", d, x);