Last result local '__'

[veelenga]

Inspired by https://github.com/pry/pry/wiki/Special-Locals#Last_result

icr(0.23.1) > a = 42
 => 42
icr(0.23.1) > __
 => 42
icr(0.23.1) > __ + 1
 => 43
icr(0.23.1) > 1 + __
 => 44
icr(0.23.1) > __.to_s
 => "44"
icr(0.23.1) > __.to_i
 => 44
icr(0.23.1) > inc = -> { __ + 1 }
 => #<Proc(Int32):0x1002ea350>
icr(0.23.1) > inc.call
 => 45
...

cc @jwoertink

[jwoertink]

Beautiful! I think it looks nice, and doesn’t feel awkward. Plus the change is pretty minimal. 👍

[veelenga]

@greyblake @crystal-community WDYT?

[veelenga]

Hey guys. Can I merge this?

[greyblake]

I think yes.
Would someone mind adding a description of this feature to README?

[veelenga]

@greyblake thanks. Added in #64