| input-stream | an input stream, default is standard input |
| eof-error-p | a boolean, true (default) is EOF should be signaled |
| eof-value | an object that is returned as EOF value |
| recursive-p | flag to note recursive processing |
READ-CHAR function reads a character from input stream.
(let ((s (make-string-input-stream (format nil "line 1~%line 2~%line 3)")))) (read-char s)) => #\l