2018-04-25 12:38:41 -04:00
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[[painless-identifiers]]
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=== Identifiers
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2018-05-23 16:36:58 -04:00
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Use an identifier as a named token to specify a
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<<painless-variables, variable>>, <<painless-types, type>>,
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<<dot-operator, field>>, <<dot-operator, method>>, or function.
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<<painless-keywords, Keywords>> cannot be used as identifiers.
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2018-04-25 12:38:41 -04:00
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*Grammar*
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[source,ANTLR4]
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----
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ID: [_a-zA-Z] [_a-zA-Z-0-9]*;
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----
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*Examples*
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* Variations of identifiers.
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+
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[source,Painless]
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----
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a
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Z
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id
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list
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list0
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MAP25
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_map25
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Map_25
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----
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