Appendix D: Troubleshooting

Common Issues

“cannot find macro aspect in this scope”

Add aspect-macros to dependencies:

[dependencies]
aspect-macros = "0.1"

“no method named before found”

Implement the Aspect trait:

#![allow(unused)]
fn main() {
impl Aspect for YourAspect {
    fn before(&self, ctx: &JoinPoint) {
        // Your code
    }
}
}

Aspect not being called

1. Verify #[aspect(...)] attribute is present
2. Check aspect implements Aspect trait
3. Ensure function is actually being called

Performance issues

1. Profile with cargo bench
2. Check for expensive operations in aspects
3. Consider caching in aspects
4. Use #[inline] for hot paths

See Getting Started for installation issues.