The following example declares a forward reference to a switch label named SELECT. Later in the program, SELECT must be declared in full.

SWITCH SELECT FORWARD

The following example declares a forward reference to an integer procedure named SUM. Later in the program, SUM must be declared in full, and its parameters must be the same in number and type as in this FORWARD REFERENCE declaration.

INTEGER PROCEDURE SUM(A,B,C);
   VALUE A,B;
   INTEGER A,B;
   REAL C;
   FORWARD

The following example declares a forward reference to a connection block type named CB. Later in the program, CB must be declared in full.

TYPE CONNECTION BLOCK CB; FORWARD