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A Lisp object that is intended to be evaluated is called a form. 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 "all other types" which are self-evaluating forms.
9.2.1 Self-Evaluating Forms Forms that evaluate to themselves. 9.2.2 Symbol Forms Symbols evaluate as variables. 9.2.3 Classification of List Forms How to distinguish various sorts of list forms. 9.2.4 Symbol Function Indirection When a symbol appears as the car of a list, we find the real function via the symbol. 9.2.5 Evaluation of Function Forms Forms that call functions. 9.2.6 Lisp Macro Evaluation Forms that call macros. 9.2.7 Special Forms "Special forms" are idiosyncratic primitives, most of them extremely important. 9.2.8 Autoloading Functions set up to load files containing their real definitions.
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