Derive Macro EncodeLabelSet 

#[derive(EncodeLabelSet)]
{
    // Attributes available to this derive:
    #[label]
}

Derives EncodeLabelSet for a struct.

Each field becomes a label with the field name as the key. Use #[label(name = "custom")] to customize the label key. Use #[label(skip)] to exclude a field from the label set. Use #[label(rename_all = "...")] on the struct to rename all fields by case rule. Supported rules: snake_case, camelCase, PascalCase, SCREAMING_SNAKE_CASE, kebab-case, lowercase, UPPERCASE.

Field types must implement EncodeLabelValue. Out of the box this covers String, &'static str, the integer types, and bool.

The struct must also derive Clone, Hash, PartialEq, and Eq. To use the label set with Family, also derive PartialOrd and Ord (the encoder produces output sorted by label set).

Example

use iroh_metrics::EncodeLabelSet;

#[derive(Clone, Hash, PartialEq, Eq, EncodeLabelSet)]
#[label(rename_all = "kebab-case")]
struct HttpLabels {
    method: String,
    #[label(name = "status_code")]
    status: u16,
}