Trait BTreeMapStrExt

Source

pub trait BTreeMapStrExt {
    // Required method
    fn insert_str(
        &mut self,
        key: impl Into<String>,
        value: impl Into<String>,
    ) -> Option<String>;
}

Expand description

Substrate extension trait over BTreeMap<String, String> — the ONE substrate owner of the <map>.insert(<k>.to_string(), <v>.to_string ()) string-string insertion shape every K8s-carrier writer (ObjectMeta annotations / labels, ConfigMap .data) hand-authored at the callsite pre-lift.

Peer of crate::json_object::JsonMapStrExt on the same “insert a string at a string key” write axis, split by receiver type (JSON-shaped Map<String, Value> vs K8s-canonical BTreeMap<String, String>). See the module docs for the naming rationale (why insert_str and not insert) and the callsite audit.

Required Methods§

Source

fn insert_str( &mut self, key: impl Into<String>, value: impl Into<String>, ) -> Option<String>

Insert an owned String value at an owned String key into this K8s-canonical string-string map. Returns Option<String> matching the underlying BTreeMap::insert semantics — None for a new key, Some(prev) for an overwrite of an existing slot.

Both slots accept any impl Into<String> — &str (via String::from), String (identity), Cow<'_, str>, so a callsite with a static annotations::POOL (&'static str) reads insert_str(annotations::POOL, pool_name) with no .to_string() per-site. Numeric or non-string values still need an explicit .to_string() at the callsite — same as pre-lift, so the wrapping shape stays visible in the caller’s grep footprint.