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Nested macro definitions #74
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This particular use-case can be easily replicated by defining a global inside the macro.
Then the macro simply checks if the global is defined (via IFCONST) just before that line.MAC onceonly IFNCONST onceonly_used_already onceonly_used_already = 1 ; body of macro ENDIF ENDM ; code.... onceonly. ; body will be inserted onceonly ; body will not be inserted, because onceonly_used_already has been definedMy point here is that the solution is very easy with the existing code.
I don't think this is a good reason to try a rewrite.
The docs say:
Actually to have such a facility is useful sometimes. Digital's Macro-11 assembler allows it. One way this is commonly used (well, common for a specific assembler for an obsolete CPU architecture) is use-once macros. A macro, if it is used, re-defines itself to be empty. Something like this: (see also https://gitlab.com/Rhialto/macro11/-/blob/master/tests/test-endm.lst.ok for a listing output)