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| 55 | <H1><A NAME="SECTION007200000000000000000"></A><A NAME="atoms"></A> |
| 56 | <a id='l2h-332' xml:id='l2h-332'></a> |
| 57 | <BR> |
| 58 | 5.2 Atoms |
| 59 | </H1> |
| 60 | |
| 61 | <P> |
| 62 | Atoms are the most basic elements of expressions. The simplest atoms |
| 63 | are identifiers or literals. Forms enclosed in |
| 64 | reverse quotes or in parentheses, brackets or braces are also |
| 65 | categorized syntactically as atoms. The syntax for atoms is: |
| 66 | |
| 67 | <P> |
| 68 | <dl><dd class="grammar"> |
| 69 | <div class="productions"> |
| 70 | <table> |
| 71 | <tr> |
| 72 | <td><a id='tok-atom' xml:id='tok-atom'>atom</a></td> |
| 73 | <td>::=</td> |
| 74 | <td><a class='grammartoken' href="identifiers.html#tok-identifier">identifier</a> | <a class='grammartoken' href="atom-literals.html#tok-literal">literal</a> | <a class='grammartoken' href="atoms.html#tok-enclosure">enclosure</a></td></tr> |
| 75 | <tr> |
| 76 | <td><a id='tok-enclosure' xml:id='tok-enclosure'>enclosure</a></td> |
| 77 | <td>::=</td> |
| 78 | <td><a class='grammartoken' href="parenthesized.html#tok-parenth_form">parenth_form</a> | <a class='grammartoken' href="lists.html#tok-list_display">list_display</a></td></tr> |
| 79 | <tr> |
| 80 | <td></td> |
| 81 | <td></td> |
| 82 | <td><code>| <a class='grammartoken' href="genexpr.html#tok-generator_expression">generator_expression</a> | <a class='grammartoken' href="dict.html#tok-dict_display">dict_display</a></code></td></tr> |
| 83 | <tr> |
| 84 | <td></td> |
| 85 | <td></td> |
| 86 | <td><code>| <a class='grammartoken' href="string-conversions.html#tok-string_conversion">string_conversion</a></code></td></tr> |
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| 90 | href="grammar.txt" type="text/plain" |
| 91 | >Download entire grammar as text.</a> |
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| 100 | |
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| 102 | <LI><A href="atom-identifiers.html">5.2.1 Identifiers (Names)</a> |
| 103 | <LI><A href="atom-literals.html">5.2.2 Literals</a> |
| 104 | <LI><A href="parenthesized.html">5.2.3 Parenthesized forms</a> |
| 105 | <LI><A href="lists.html">5.2.4 List displays</a> |
| 106 | <LI><A href="genexpr.html">5.2.5 Generator expressions</a> |
| 107 | <LI><A href="dict.html">5.2.6 Dictionary displays</a> |
| 108 | <LI><A href="string-conversions.html">5.2.7 String conversions</a> |
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