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Postings from March 2023
Few short assorted thoughts:
- write once behaviour will be great
- referring to my earlier proposal for `not-exists` value - define
behaviour: constant not-existing value can be assigned once
- perl core imho needs to rework magic (I'd vote for function tables per SV
- where function table will be on par with packages / class literals)
- should there be an mechanism to turn it on/off in runtime?, eg
my $var = { ... };
foo ($var : const);
$var->{bar} //= default value;
return $bar;
- how it should behave when returning copy? clone / copy-on-write? eg:
state $var :const = { ... };
return $var : copy-on-write;
- can it be localized? If localized, should it still be "deep constant" ?
- how initialization with read-write data will behave?, eg:
my $foo = { ... };
my $bar : const = { foo => $foo };
- it will be also nice to be able to bound read-write to visibility of
symbol(s) (aka protected)
- class may mark its instance as conditional read only
- user may mark instance as fully read-only
Brano
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