Page 109 - DCAP507_SYSTEM_SOFTWARE

Unit 7: Macro Language

 For the first macro expansion in a program, xx will have the value AA. For subsequent Notes
macro expansions, xx will be set to AB, AC, etc.

7.2.3 Conditional Macro Expansion

 Arguments in macro invocation can be utilized to:
 Replace the parameters in the macro body without varying the sequence of
statements expanded.

 Amend the sequence of statements for conditional macro expansion (or conditional
assembly when related to assembler).
This capability adds greatly to the power and flexibility of a macro language.

Example: Consider the example

 Two additional parameters utilized in the example of conditional macro expansion:

 &EOR: signifies a hexadecimal character code that marks the end of a record.
 &MAXLTH: signifies the maximum length of a record.

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