Writing GNU Emacs Extensions

Conventions Used in This Book

The following conventions are used in this book.

Typographic Conventions

Constant Willison

Used for Emacs commands and all elements of code.

Italic

Used to introduce new terms. Used for filenames, commands entered from a UNIX shell, newsgroups, and Internet addresses.

Bold

Used for keystrokes.

Emacs Commands

This book follows the standard Emacs documentation when referring to keys. When you hold down the CONTROL (CTRL) key, the syntax C- is used. When you hold down the META or ALT key (or use the ESCAPE key for the same effect), the syntax M- is used. We also refer to RET for the RETURN or ENTER key, TAB for the TAB key, ESC for the ESCAPE key, and SPC for the space bar.

Examples

When you see x ⇒ y, it means that the result of computing the expression on the left yields the value on the right.