30.1. Overview
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## 30.1. Overview

This interface permits the definition of new classes of streams, and programming their behavior by defining methods for the elementary stream operations. It is based on the proposal STREAM-DEFINITION-BY-USER:GENERIC-FUNCTIONS of David N. Gray to X3J13 and is supported by most Common Lisp implementations currently in use.

All symbols defined by this interface, starting with the prefix `FUNDAMENTAL-` or `STREAM-`, are exported from the package “GRAY” and `EXT:RE-EXPORT`ed from “EXT”.

| These notes document CLISP version 2.45 | Last modified: 2008-05-14

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Chapter 30. Gray streams | Home | 30.2. Defined classes