Variable declaration

The Macro Assembler can provide a way to associated a type with a symbol which is defined externally. This is done by extending the XREF syntax:

    
  XREF var: typeName, var2

where:

var is the name of an externally defined symbol.
typeName is the type associated with the variable var.

var2 is the name of another externally defined symbol. This symbol is not associated with any type. See the following listing for an example.

Listing: Example of extending XREF


myType: STRUCT
field1:   DS.W 1

field2:   DS.W 1

field3:   DS.B 1

field4:   DS.B 3

field5:   DS.W 1

        ENDSTRUCT

        XREF extData: myType ; var `extData' is type `myType'