* optimize layout of the parsed_number_string_t.

Author: IRainman

include/fast_float/ascii_number.h

@@ -250,19 +250,18 @@ enum class parse_error : uint_fast8_t {
 };
 
 template <typename UC> struct parsed_number_string_t {
-  // an unsigned int avoids signed overflows (which are bad)
   am_mant_t mantissa{0};
   am_pow_t exponent{0};
+  // contains the range of the significant digits
+  span<UC const> integer{};  // non-nullable
+  span<UC const> fraction{}; // nullable
   UC const *lastmatch{nullptr};
 #ifndef FASTFLOAT_ONLY_POSITIVE_C_NUMBER_WO_INF_NAN
   bool negative{false};
 #endif
-  bool invalid{false};
-  bool too_many_digits{false};
-  // contains the range of the significant digits
-  span<UC const> integer{};  // non-nullable
-  span<UC const> fraction{}; // nullable
-  parse_error error{parse_error::no_error};
+  bool invalid{false}; // be optimistic
+  bool too_many_digits{false}; // be optimistic
+  parse_error error{parse_error::no_error}; // be optimistic
 };
 
 using byte_span = span<char const>;

include/fast_float/float_common.h

@@ -502,7 +502,7 @@ full_multiplication(uint64_t a, uint64_t b) noexcept {
 }
 
 // Value of the mantissa.
-typedef uint_fast64_t am_mant_t;
+typedef uint_fast64_t am_mant_t; // an unsigned int avoids signed overflows (which are bad)
 // Size of bits in the mantissa and path and rounding shifts
 typedef int_fast8_t am_bits_t;