cvt_asm: Nested macro support (future enhancement)

[CTalkobt]

Deferred Feature: Nested Macro Support for cvt_asm

Status

DEFERRED - Low priority, no current demand. Will implement when:

• A real-world use case with nested macros appears
• User requests it with an actual file
• Benefit-to-effort ratio improves

Current Behavior

Single-level macros fully supported:

• ✓ Extract macro definitions
• ✓ Preserve in macro-supporting formats
• ✓ Expand for non-macro formats

Nested macros:

• ✗ NOT supported (treated as macro body content)
• Result: Nested structure is flattened, functionality preserved

Why Deferred

1. Not used in practice - No evidence in 6502/65C02 assembly code
2. Acceptable degradation - Files still convert correctly (just flattened)
3. Implementation cost - ~200 lines of code + testing
4. Better use of time - Prioritize features with actual demand

Implementation (When Needed)

Would require:

• Nesting depth tracking (not just boolean flag)
• Stack-based macro storage for nested levels
• Parameter scoping per nesting level
• Recursive expansion logic
• Test suite for nested expansion

Related

• feat: Implement macro preservation for lossless cvt_asm conversions #215 - Macro preservation system (completed)
• Feature: Support nested macros in ca45 assembler #232 - Nested macros in ca45 assembler
• Feature: Support nested macros in cc45 preprocessor #233 - Nested macros in cc45 preprocessor

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Priority: LOW
Effort: MEDIUM
Demand: NONE (currently)
Status: FUTURE WORK