fix: expand nested macro arguments - #378
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Nested calls such as
ADD10(ADD10(4))leave the inner macro unexpanded and fail withunrecognized function. Expand referenced arguments before suppressing the outer macro in its replacement body, while preserving recursion suppression and leaving unused arguments unexpanded. Report argument-expansion errors at the macro call site.Validated with
cargo check --offline,cargo test --offline(12 tests), and formatting checks for the changed file. On macOS, both reported examples compile and emitsay 14andsay 24; all 12 existing fixture projects also compile. CLI validation usedstd = "0.0.0"to avoid an unrelated sandbox network-initialization panic.