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For declaring data elements outside of any data section, the OF clause can be used for any local variable declaration.

Syntax:

Label OF DataType = InitialValue

Scope of new variable:

The new variable has the same scope as if it were declared in the CODE section, however it is NOT available in the CODE section prior to it's declaration line. The only requirement is that the variable must be initialized at the point of declaration.

Examples:

UsingOF PROCEDURE()

CODE

 A1 OF LONG = 1                     !A1 is declared as a LONG

 L1 OF List<;LONG> = NEW List<;LONG>  !reference to generic list

SomeMethod PROCEDURE()

 INLINE

 CODE

   Ndx OF Int32=0

   Customers OF List<;Customer> = NEW List<;Customer>

   Cust0 OF Customer = NEW Customer()

   Cust1 OF Customer = NEW Customer(){ LastName=“Z”, FirstName=“Bob”}

   Cust2 OF Customer = NEW Customer{ LastName=“Z”, FirstName=“Bob”}

   Cust3 OF Customer = NULL

   LOOP I OF Int32 = 1 TO 4

      !do something

   END

   FOREACH( Cust OF Customer IN Customers)

      !do something

   END

 END !SomeMethod

Compiler Errors can occur based on the following scenarios:

·No Initial Value:

CODE

Ndx2 OF Int32 !<;– compile error:

Compiler error: Unexpected end of line (CLA00384)

·The variable is accessed prior to declaration

CODE

Debug.WriteLine(L) !<;– compile error:

L OF LONG = 0

Compiler error: L is being used before being declared (CLA00248)

·The variable declared already exists

CODE

LOOP I OF Int32 = 1 TO 4

!do something

END

LOOP I OF Int32 = 1 TO 4 !<;– compile error:

!do something

END

J Int32

CODE

J OF Int32 = 42 !<;– compile error:

Compiler error: Identifier is already defined: 'I' (Cla00185) ' (in both examples).

See also: Generics