Re: Nested definitions

Ruvim <ruvim.pinka@gmail.com> writes:

On 2025-07-02 19:12, Anton Ertl wrote:

The benefit of defining a normal colon definition inside another colon
definition eludes me, however.  Maybe mutual recursion, but the need
is rare and deferred words handle that well.

>
As I can see, the idea is that the name of a nested definition has the
limited scope — the same as a local variable, and it is not visible
outside of the containing definition.

I have found the limited scope to be a hindrance, not a help: When I
want to debug, I want to call the word, but if it is not visible,
that's hard.  There is a compromise: The scope recognizer allows to
invoke a word X in a vocabulary V with the syntax V:X:

vocabulary foo  ok
also foo definitions  ok
create foo1  ok
previous definitions  ok
foo1
*the terminal*:9:1: error: Undefined word

foo1<<<

Backtrace:
kernel/recognizer.fs:89:21:              0 $7FCA47A12FF8 throw
foo:foo1 hex. \ output: $7FCA47AA0DE8  ok

- anton
--
M. Anton Ertl  http://www.complang.tuwien.ac.at/anton/home.html
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