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diff --git a/devdocs/elisp/evaluation-notation.html b/devdocs/elisp/evaluation-notation.html new file mode 100644 index 00000000..cb7ff210 --- /dev/null +++ b/devdocs/elisp/evaluation-notation.html @@ -0,0 +1,15 @@ + <h4 class="subsection">Evaluation Notation</h4> <p>A Lisp expression that you can evaluate is called a <em>form</em>. Evaluating a form always produces a result, which is a Lisp object. In the examples in this manual, this is indicated with ‘<samp>⇒</samp>’: </p> <div class="example"> <pre class="example">(car '(1 2)) + ⇒ 1 +</pre> +</div> <p>You can read this as “<code>(car '(1 2))</code> evaluates to 1”. </p> <p>When a form is a macro call, it expands into a new form for Lisp to evaluate. We show the result of the expansion with ‘<samp>→</samp>’. We may or may not show the result of the evaluation of the expanded form. </p> <div class="example"> <pre class="example">(third '(a b c)) + → (car (cdr (cdr '(a b c)))) + ⇒ c +</pre> +</div> <p>To help describe one form, we sometimes show another form that produces identical results. The exact equivalence of two forms is indicated with ‘<samp>≡</samp>’. </p> <div class="example"> <pre class="example">(make-sparse-keymap) ≡ (list 'keymap) +</pre> +</div><div class="_attribution"> + <p class="_attribution-p"> + Copyright © 1990-1996, 1998-2022 Free Software Foundation, Inc. <br>Licensed under the GNU GPL license.<br> + <a href="https://www.gnu.org/software/emacs/manual/html_node/elisp/Evaluation-Notation.html" class="_attribution-link">https://www.gnu.org/software/emacs/manual/html_node/elisp/Evaluation-Notation.html</a> + </p> +</div> |