allow specifying Alt key combinations

[agarwal]

The key sequence parser only supports C-, M-, and S-. Would it be possible to support Alt- (I'm not sure what is the standard abbreviation for Alt). I'm still unable to make use of utop's autocompletion because of issues as reported in: ocaml-community/utop#25, ocaml-community/utop#43, and ocaml-community/utop#42.

[Drup]

Alt- is the same as M-

[agarwal]

Alt- is the same as M-

Is that true by definition, or is it just usually the case? If I set M-left, M-right, and M-down in my .lambda-term-inputrc, I still can't use Alt key combinations to navigate the completion bar.

[agarwal]

Well, I found an option in Mac's Terminal app to "Use Option as Meta key", and further the Option and Alt key are the same on my Apple keyboard. I set this option, which presumably assures that my Alt key is the Meta key, but still no luck. The problem is the same when I'm connected to Linux systems and when I use xterm.

[ghost]

I tried and the Mac's terminals returns M-b, M-f, ... for Option+Arrow. I'll add these bindings by default when running on the Mac's terminal. In the meantime you can bind M-b, M-f, ... You can use the script print_sequences to find out the exact characters.

[agarwal]

@diml thanks! I used print_sequences before but somehow managed to not get the settings correct. Now, finally, it works with:

$ cat ~/.lambda-term-inputrc 
[read-line]
M-b: complete-bar-prev
M-f: complete-bar-next