pub fn join(prefix: &str, suffix: &str) -> Option<String>Expand description
Joins two key expressions with a / and returns the canonical form of the result.
This is how a key is built under a prefix, such as a node’s own subtree of a fleet, without spelling the separator by hand or leaving a non-canonical pair of wildcards at the seam.
§Arguments
prefix- the leading key expression.suffix- the key expression to place beneath it.
§Returns
Some(joined) in canonical form; None if either side is empty or the joined expression is
not valid.
§Examples
use pamoja_zenoh::keyexpr::join;
assert_eq!(join("fleet/n7", "battery").as_deref(), Some("fleet/n7/battery"));
assert_eq!(join("fleet/**", "*").as_deref(), Some("fleet/*/**")); // canonized at the seam
assert_eq!(join("fleet/", "battery"), None); // the seam would be an empty chunk