alef 0.114.0

Opinionated polyglot binding generator for Rust libraries
Documentation 
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/// Convert a `{{ rust_path }}` error to a Python exception.
fn {{ fn_name }}(e: {{ rust_path }}) -> pyo3::PyErr {
    let msg = e.to_string();
    #[allow(unreachable_patterns)]
{% if attribute_arms %}
    let exception = match &e {
{% else %}
    match &e {
{% endif %}
{% for arm in arms %}
        {{ arm }}
{% endfor %}
        {{ default_arm }}
{% if attribute_arms %}
    };
    let attributes = pyo3::Python::attach(|py| -> pyo3::PyResult<()> {
        let value = exception.value(py);
{% if attribute_arms|length == 1 %}
{% set arm = attribute_arms[0] %}
        #[allow(irrefutable_let_patterns, reason = "single-variant and non-exhaustive errors share this payload branch")]
        if let {{ arm.pattern }} { {{ arm.bindings }}, .. } = &e {
{% for field in arm.fields %}
            value.setattr("{{ field.python_name }}", Clone::clone({{ field.name }}))?;
{% endfor %}
        }
{% else %}
        #[allow(unreachable_patterns)]
        match &e {
{% for arm in attribute_arms %}
            {{ arm.pattern }} { {{ arm.bindings }}, .. } => {
{% for field in arm.fields %}
                value.setattr("{{ field.python_name }}", Clone::clone({{ field.name }}))?;
{% endfor %}
            }
{% endfor %}
            _ => {}
        }
{% endif %}
        Ok(())
    });
    match attributes {
        Ok(()) => exception,
        Err(error) => error,
    }
{% else %}
    }
{% endif %}
}