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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Painless: Restructure/Clean Up of Spec Documentation (#31013)
Full restructure of the spec into new sections for operators, statements, scripts, functions, lambdas, and regexes. Split of operators into 6 sections, a table, reference, array, numeric, boolean, and general. Clean up of all operators sections. Sporadic clean up else where.
2018-06-07 20:11:56 -04:00
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<<field-access-operator, field>>, <<method-call-operator, method>>, or
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<<painless-functions, function>>.
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*Errors*
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If a <<painless-keywords, keyword>> is used as an identifier.
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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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