[how-to] Set minimal prefix length depends on language

[qingshuizheng]

Hi Minad,

Is there a way to set corfu-auto-prefix length based on the language.
My use case is that: when I type english, I like it to be length of 3; when I type Chinese, I like it to be 2.

I have tried this, but to no void:
(setq corfu-auto-prefix (if (looking-back "[[:alpha:]]") 3 2))

Thank you.

[minad]

I think that your setter should work if you change the value of corfu-auto-prefix locally in a :before advice of corfu--auto-complete. Maybe use A-Za-z instead of :alpha:? Did you try this? If you have separate buffers you can also change the prefix length buffer locally. But such a behavior is very special we cannot support it ootb.