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Kinds of Forms

A Lisp object that is intended to be evaluated is called a form (or an expression). How Emacs evaluates a form depends on its data type. Emacs has three different kinds of form that are evaluated differently: symbols, lists, and all other types. This section describes all three kinds, one by one, starting with the other types, which are self-evaluating forms.

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• Self-Evaluating Forms + Forms that evaluate to themselves.
• Symbol Forms + Symbols evaluate as variables.
• Classifying Lists + How to distinguish various sorts of list forms.
• Function Indirection + When a symbol appears as the car of a list, we find the real function via the symbol.
• Function Forms + Forms that call functions.
• Macro Forms + Forms that call macros.
• Special Forms + Special forms are idiosyncratic primitives, most of them extremely important.
• Autoloading + Functions set up to load files containing their real definitions.
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+ Copyright © 1990-1996, 1998-2022 Free Software Foundation, Inc.
Licensed under the GNU GPL license.
+ https://www.gnu.org/software/emacs/manual/html_node/elisp/Forms.html +

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