Struct member manipulation

[tsnofvdr]

I work on a system that communicates with other systems via messages. Those messages are defined in a spec and every word must be exactly as defined. To accomplish this Ada allows me to define the fields of my record to specific words in memory. Will C++ allow me to accomplish this same task and if so could someone post an example

word = 4;

type Msg_Type1 is record
   x: Some_Type;
   y: Another_Type;
   z: Another_Type;
end record;

// ada allows me to rep out my record using the 'for use' clause
for Msg_Type1 use record
   x at 0*word range 0..31;
   y at 1*word range 0..15;
   z at 1*word range 16..31;
end record;