Return a double object having the value closest to the value of the specified decimal object following the conversion rules defined by IEEE-754:
Declared in <bdldfp_decimalconvertutil.h>
static
double
decimalToDouble(Decimal32 decimal);* If the decimal object is a NaN, return a NaN. * Otherwise if decimal is positive or negative infinity, return infinity of the same sign. * Otherwise if decimal is positive or negative zero, return zero of the same sign. * Otherwise if decimal object has an absolute value that is larger than std::numeric_limits<double>::max(), raise the "overflow" floating-point exception and return infinity of the same sign as decimal. * Otherwise if decimal has an absolute value that is smaller than std::numeric_limits<double>::min(), raise the "underflow" floating-point exception and return zero of the same sign as decimal. * Otherwise if decimal has a value that has more significant base-10 digits than std::numeric_limits<double>::digits10, raise the "inexact" floating-point exception, round that value according to the binary rounding direction setting of the floating-point environment, and return the result of that. * Otherwise if decimal has a significand that cannot be exactly represented using binary floating-point, raise the "inexact" floating-point exception, round that value according to the binary rounding direction setting of the environment, and return the result of that. * Otherwise use the exact value of the other object for the initialization if this object.