Re: [PATCH v3] rdelim: Add new procedure `for-line-in-file`.

[Ricardo Wurmus <rekado@elephly.net>]

Adam Faiz <adam.faiz@disroot.org> writes:

> +(define* (for-line-in-file file proc
> +                           #:key (encoding #f) (guess-encoding #f))
> +  "Call PROC for every line in FILE until the eof-object is reached.
> +FILE can either be a filename string or an already opened input port.
> +The corresponding port is closed upon completion.
> +
> +The line provided to PROC is guaranteed to be a string."
> +  (let ((port
> +         (if (input-port? file)
> +             file
> +             (open-input-file file
> +                              #:encoding encoding
> +                              #:guess-encoding guess-encoding))))
> +    (let loop ((line (read-line port)))
> +      (cond ((eof-object? line)
> +             (close-port port))
> +            (else
> +             (proc line)
> +             (loop (read-line port)))))))

I think the port would leak if PROC were to raise an exception.

-- 
Ricardo