[Bug-apl] Suggestion: Support multi-line lambda functions

[Elias Mårtenson]

It seems as though using the foo←{...} style of writing functions is quite popular in the Dyalog community.

An example file written in this style can be found here: https://github.com/mattcunningham/apl-bayesian-classifier/blob/master/bayes.full.apl

As we can see, functions are declared in this style:

      foo ← {

          x ← 1+⍵

          y ← 1+⍺

          x+y

      }

I'd like to see this being supported in GNU APL as well.

Related, I'd like to be able to use ◊ inside a lambda function. Whenever I port a function from Dyalog I end up having to rewrite these using ⊣ and ⊢, which is not hard but feels arbitrary. Right now ◊ doesnt work at all in lambdas, so adding support for it shouldn't cause any compatibility issues with APL2.

Regards,

Elias