5.11 The STREAMS module
peek
Open generic function
Summary
Returns the next element of a stream without advancing the stream position.
Signature
peek input-stream #key on-end-of-stream => element-or-eof
Arguments
- input-stream
- An instance of
<stream>. - on-end-of-stream
- An instance of
<object>.
Values
- element-or-eof
- An instance of
<object>, or#f.
Library
io
Module
streams
Description
This function behaves as read-element does, but the stream position is not advanced.