un named bit fields

[sophia]

Dear all,
what exactly is the purpose of un named bit field such as this

struct
{
int first_bit : 1;
unsigned : 14;
int last_bit : 1;
} bf;

[robertwessel2]

On Apr 16, 11:42*am, sophia <[e-mail]:

Dear all,

what exactly is the purpose of un named bit field such as this

struct
{
* *int first_bit : 1;
* *unsigned * : 14;
* *int last_bit : 1;

} bf;

Spacing. Presumably this structure maps onto some externally defined
layout (given the details of how bit fields are implemented on this
particular implementation), and the ":14" defines a range of 14 unused
(or uninteresting) bits.