Simplify code

autometrics-macros/src/result_labels.rs

@@ -56,7 +56,7 @@ pub(crate) fn expand(input: DeriveInput) -> Result<TokenStream> {
 
     Ok(quote! {
         #[automatically_derived]
-        impl #impl_generics ::autometrics::__private::GetResultLabelFromEnum for #enum_name #ty_generics #where_clause {
+        impl #impl_generics ::autometrics::__private::GetResultLabel for #enum_name #ty_generics #where_clause {
             fn __autometrics_get_result_label(&self) -> &'static str {
                 #(#conditional_clauses_for_labels)*
                 #ERROR_KEY

autometrics/src/labels.rs

@@ -233,12 +233,3 @@ pub trait GetResultLabel {
     }
 }
 impl_trait_for_types!(GetResultLabel);
-
-/// Implementation detail to get enum variants to specify their own
-/// "result" label
-pub trait GetResultLabelFromEnum {
-    /// Return the value to use for the [result](RESULT_KEY) value in the reported metrics
-    fn __autometrics_get_result_label(&self) -> &'static str {
-        ERROR_KEY
-    }
-}

autometrics/tests/result_labels/pass/macro.rs

@@ -4,7 +4,7 @@
 //! autometrics (the library) is then responsible for orchestrating the
 //! calls to `__autometrics_get_error_label` correctly when observing
 //! function call results for the metrics.
-use autometrics::__private::GetResultLabelFromEnum;
+use autometrics::__private::GetResultLabel;
 use autometrics_macros::ResultLabels;
 
 struct Inner {}