Readline.bind_key doesn't work

[faustinoaq]

By example:

require "readline"

Readline.bind_key('a') do
  puts "Hi!"
end

sleep

Shows:

Error in keysignal.cr:3: expected block to return Int32, not Nil

Readline.bind_key('a') do

So, I tried this:

require "readline"

Readline.bind_key('a') do
  puts "Hi!"
  0
end

sleep

and it compiles, but it doesn't detect a keyword

Ref: #1290 (comment)

Version:

[main@pc ~]$ crystal -v
Crystal 0.27.0 (2018-11-02)

LLVM: 6.0.1
Default target: x86_64-pc-linux-gnu

[jwoertink]

I've had issues with the Readline stuff in the past. I remember seeing something like the core team has no one that knows readline that well, and there was even some talk of pulling it out of the core.

Just for anyone that comes across this, if you know readline, or are willing to give it a shot, this lib could use some seriously love. It could even potentially help us toward having a real(ish) REPL.

[RX14]

Readline is going to go. I just need to get around to pulling it out.

[RX14]

Not relevant any more, see #8364