string if writer and fmt are not set; void otherwise.Nullable.toString
string toString()()Gives the string "Nullable.null" if isNull is true. Otherwise, the result is equivalent to calling formattedWrite on the underlying value.
Parameters
writer | A char accepting output range |
fmt | A FormatSpec which is used to represent the value if this Nullable is not null |
Returns
A
string toString()() constditto
void toString(W)(ref W writer, scope const ref FormatSpec!char fmt) if (isOutputRange!(W, char))ditto
void toString(W)(ref W writer, scope const ref FormatSpec!char fmt) if (isOutputRange!(W, char)) constditto