Ruvim <
ruvim.pinka@gmail.com> writes:
On 2024-09-15 20:16, Anton Ertl wrote:
A major merit for value-flavoured structures is that you can change
the field size (e.g, from 1 byte to 2 bytes or vice versa) without
changing all the code accessing those fields. That's independent of
cell size.
Yes, you can change the field size, but only as far as its value
occupies the same number of a stack items and the stack is the same.
Yes. But you can switch between different sizes that all fit into a
cell, or between different memory sizes of floats without changing the
rest of the code.
Similar for the word `to` - `to` applies to the words created with
`value`, `fvalue`, `2value`. But the source code around `to foo` (and
`foo`) depends on the kind of `foo`, so the kind of `foo` cannot be
changed without changing the source code around where it is used.
That's just as for reading the value-flavoured field; if a field
pushes one cell, TO to the field also consumes one cell; likewise for
float fields.
- anton
--
M. Anton Ertl
http://www.complang.tuwien.ac.at/anton/home.html
comp.lang.forth FAQs:
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