Enumeration Statement Summary

Enumeration is a terminal or nonterminal declaration statement that occurs in reference scripts. It is also a metalanguage statement that is used to define not only enumerations in the source language, VB6, but also enumerations in the gmBasic languages themselves. An Enumeration is an identified set of (identifier, value) pairs. Each identifier in the Enumeration must be unique within the set. Each value in the Enumeration must be of the same type, but need not be unique. The value type can be any type including string and another enumeration. Each pair within the enumeration is referred to as an entry. Enumerations appear in both library and language descriptions; therefore, they also support all of the various migration attributes that can be associated with such components.

The terminal form of the Enumeration statement is used to deal with the forward reference problems in library declarations. It is often the case that a component in one class references another type defining component that has not yet been defined. Rather than trying to sort the definitions into a "reference" order, gmBasic, when it authors the declarations, adds a set of terminal Enumeration statements to the front of the library declaration with only the Id attribute specified. The later Enumeration statement with the same Id then specifies the remaining attributes and substatements.

The attributes of the Enumeration statement are as follows:

The substatements within the Enumeration statement are as follows:

The script errors associated with the Enumeration statement are as follows:

Entry Enumeration Substatement Summary

Entry is a terminal substatement of the Enumeration statement. It defines an identifier value pair within the enumeration. The attributes of the Entry substatement are as follows:

The script errors associated with the Entry substatement are as follows: