diff options
Diffstat (limited to 'txr.1')
| -rw-r--r-- | txr.1 | 23 |
1 files changed, 23 insertions, 0 deletions
@@ -10465,6 +10465,29 @@ the two operations will interfere with the UTF-8 decoding. These functions return nil when the end of data is reached. Errors are represented as exceptions. +.SS Functions unget-char and unget-byte + +.TP +Syntax: + + (unget-char <char> [<stream>]) + (unget-byte <byte> [<stream>]) + +.TP +Description: + +These character put back, into a stream, a character or byte which was +previously read. The character or byte must match the one which was most +recently read. If the <stream> parameter is omitted, then the *stdin* +stream is used. + +If the operation succeeds, the byte or character value is returned. +A nil return indicates that the operation is unsupported. + +Some streams do not support these operations; some support +only one of them. In general, if a stream supports get-char, +it supports unget-char, and likewise for get-byte and unget-byte. + .SS Functions put-string, put-line, put-char and put-byte .TP |