prost-reflect-validate 0.2.9

protoc-gen-validate's validation using prost-reflect
Documentation 
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use prost_reflect::{FieldDescriptor, Value};
use prost_validate::format_err;
use prost_validate_types::{FieldRules, FieldRulesExt};
use std::borrow::Cow;
use std::sync::Arc;

#[allow(clippy::ptr_arg)]
pub(crate) fn is_set(val: &Cow<Value>) -> bool {
    match val {
        Cow::Borrowed(_) => true,
        Cow::Owned(_) => false,
    }
}

pub(crate) fn get_field_rules(
    field: &FieldDescriptor,
) -> prost_validate::Result<Option<Arc<FieldRules>>> {
    let rules = match field
        .validation_rules()
        .map_err(|e| format_err!(field.full_name(), "{}", e))?
    {
        Some(r) => r,
        None => return Ok(None),
    };
    Ok(Some(Arc::new(rules)))
}