ActionScript 3 Language Specification |
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| ActionScript 3.0 Language Specification > 14 Expressions | |||
The syntax in this section contains the following superscript and subscript symbols:
opt subscript is attached to symbols that are optional.allowIn superscript is attached to nonterminals that can be defined with a production rule that contains the in operator.noIn superscript is attached to nonterminals with definitions that do not include a production rule that contains the in operator. This superscript is necessary to avoid conflicts between the in operator as part of a relational expression and the in operator as part of a for statement.β superscript is shorthand notation that denotes a nonterminal with a pair of definitions: an allowIn version and a noIn version.
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