Elvish: Problem with array slicing syntax

[notramo]

Can't use variable names as the starting index of the slice when using a slice of a list. The shell interprets it as if it would be a namespace:

i = 2
put [ a b c d e ][$i:5]

It should output ▶ [c d e], but it gives a compilation error that variable 5 is not found in the $i namespace.
What do you think about using .. (used in many languages e.g. Ruby, Crystal, Perl6) instead of : for slices?

[zzamboni]

You can wrap the variable in curly braces, like this:

put [ a b c d e ][{$i}:5]
▶ [c d e]

[notramo]

@zzamboni Another solution is [ a b c d e ][(put $i):5]. But both are ugly and hard to read.

[xiaq]

Aha. Good point. Let's use ...

[xiaq]

Planning to address this before 0.15.

[krader1961]

If someone were to tackle this is the intent is to support : and .. with : marked as deprecated in the documentation?

[xiaq]

Yes, and use of : for slices should emit a warning.