use restart to accept junk char.

[snmsts]

No description provided.

[luismbo]

The current way to partially achieve this is to use *suppress-character-coding-errors* (or pass :errorp nil to octets-to-string. (Alas, it doesn't really let you pick the replacement character. :-()

Have a look at some discussion about this issue here: https://github.com/cl-babel/babel/blob/master/src/encodings.lisp#L413

https://github.com/cl-babel/babel/blob/master/src/encodings.lisp#L473 and https://github.com/cl-babel/babel/blob/master/src/encodings.lisp#L498 are the correct places to insert the restart.

I'd like to have an idea of performance impact of setting up a restart on each encoding error, versus using a *REPLACEMENT-CHARACTER* special variable.

[snmsts]

ok. I will review code.

to observe usecases to convert Japanese legacy codes.
I think it's better to have some strategy.
like

• just rise error (previous)
• omit characters that is not in the table.
• replace unknown character substitute to a representative value (for example any character not in the table are replaced to #?)
• replace unknow character to substitute by some rule (example half-width for "?" full-width for "??")

I'm not sure more cases...
I'm also not sure the performance impact but It was quite easy to implement the ceases.
I understand It is better to think more about API.