tier 0.1.17

Rust configuration library for layered TOML, env, and CLI settings
Documentation 
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use std::collections::BTreeMap;

use super::super::{ConfigMetadata, MergeStrategy};

impl ConfigMetadata {
    /// Returns explicitly declared field merge strategies keyed by normalized path.
    #[must_use]
    pub fn merge_strategies(&self) -> BTreeMap<String, MergeStrategy> {
        self.fields
            .iter()
            .filter(|field| field.merge_explicit)
            .map(|field| (field.path.clone(), field.merge))
            .collect()
    }

    /// Resolves the effective merge strategy for a concrete configuration path.
    #[must_use]
    pub fn merge_strategy_for(&self, path: &str) -> Option<MergeStrategy> {
        self.effective_field_for(path).map(|field| field.merge)
    }
}