BEGIN-STRUCTURE, END-STRUCTURE, +FIELD, FIELD:, CFIELD:, FFIELD:,
SFFIELD:, DFFIELD: — the Forth 2012 structure-definition family plus
the float-typed variants for symmetry with WAFER's float wordset.
Each defining word carries its own inline CREATE .. DOES> — factoring
through a shared +FIELD helper doesn't work in WAFER, because DOES>-
defining words only dispatch at the outer interpreter, not from compiled
IR. So FIELD: can't call +FIELD and have the DOES> action fire; each
FIELD:/CFIELD:/... repeats the pattern directly.
Three tests cover size computation, field offsets, and mixed cell + char
fields with alignment.
ok2
64f4b1e857