Crate aetos_macro 

Procedural macros for the aetos metrics library.

This crate provides the #[metrics] attribute macro and #[derive(Label)] macro for generating Prometheus metrics rendering code.

Label Validation

The #[metrics] macro validates that the label attribute is not used on common scalar primitive types (u64, f64, i32, etc.). Using label on these types will produce a compile error:

error: the 'label' attribute is not supported on scalar types like u64, f64, etc.
       Labels are only supported on collection types that implement IntoIterator.

Note: This validation only catches common primitive types. Type aliases and custom wrapper types are not detected and will silently ignore labels.

See the main aetos crate documentation for usage examples.

Attribute Macros

metrics

Derive Macros

Label