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A stream is an object that can be used as a source or sink for characters—either to supply characters for input or to accept them as output. Many different types can be used this way: markers, buffers, strings, and functions. Most often, input streams (character sources) obtain characters from the keyboard, a buffer, or a file, and output streams (character sinks) send characters to a buffer, such as a ‘*Help*’ buffer, or to the echo area.
The object nil, in addition to its other meanings, may be used as a
stream. It stands for the value of the variable standard-input or
standard-output. Also, the object t as a stream specifies
input using the minibuffer (voir la section Minibuffers) or output in the echo area
(voir la section The Echo Area).
Streams have no special printed representation or read syntax, and print as whatever primitive type they are.
Voir la section Reading and Printing Lisp Objects, for a description of functions related to streams, including parsing and printing functions.
Ce document a été généré par Eric Reinbold le 13 Octobre 2007 en utilisant texi2html 1.78.