projects / OpenSPARC-T2-SAM / blame
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| 55 | <H2><A NAME="SECTION007210000000000000000"></A><A NAME="atom-identifiers"></A> | |
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| 57 | <BR> | |
| 58 | 5.2.1 Identifiers (Names) | |
| 59 | </H2> | |
| 60 | ||
| 61 | <P> | |
| 62 | An identifier occurring as an atom is a name. See | |
| 63 | section <A href="naming.html#naming">4.1</A> for documentation of naming and binding. | |
| 64 | ||
| 65 | <P> | |
| 66 | When the name is bound to an object, evaluation of the atom yields | |
| 67 | that object. When a name is not bound, an attempt to evaluate it | |
| 68 | raises a <tt class="exception">NameError</tt> exception. | |
| 69 | <a id='l2h-334' xml:id='l2h-334'></a> | |
| 70 | <P> | |
| 71 | <strong>Private name mangling:</strong> | |
| 72 | <a id='l2h-335' xml:id='l2h-335'></a><a id='l2h-336' xml:id='l2h-336'></a>When an identifier that textually occurs in a class definition begins | |
| 73 | with two or more underscore characters and does not end in two or more | |
| 74 | underscores, it is considered a <i class="dfn">private name</i> of that class. | |
| 75 | Private names are transformed to a longer form before code is | |
| 76 | generated for them. The transformation inserts the class name in | |
| 77 | front of the name, with leading underscores removed, and a single | |
| 78 | underscore inserted in front of the class name. For example, the | |
| 79 | identifier <code>__spam</code> occurring in a class named <code>Ham</code> will be | |
| 80 | transformed to <code>_Ham__spam</code>. This transformation is independent | |
| 81 | of the syntactical context in which the identifier is used. If the | |
| 82 | transformed name is extremely long (longer than 255 characters), | |
| 83 | implementation defined truncation may happen. If the class name | |
| 84 | consists only of underscores, no transformation is done. | |
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