( n1 n2 "<spaces>name"
Skip leading space delimiters. Parse name
by a space. Create a definition for name
execution semantics defined below. Return n3
is the offset
in the data structure before +FIELD
is the size of the data to be added to the data
are in address units.
+FIELD is not required to align items. This is
deliberate and allows the construction of unaligned data
structures for communication with external elements such
as a hardware register map or protocol packet.
Field alignment has been left to the appropriate
Create a new field within a structure definition
of size n bytes.
n <"name"> -- ; Exec: addr -- 'addr
CREATE OVER , +
DOES> @ +