Function map_dag 

pub fn map_dag<F>(ipld: &Ipld, transform: &F) -> Ipld
where
    F: Fn(&Ipld) -> Ipld,

Transform all nodes in a DAG using a mapping function.

Applies the transformation function to each node in the IPLD structure, building a new transformed DAG.

Arguments

• ipld - The IPLD data to transform
• transform - Function to transform each node

Returns

The transformed IPLD structure

Examples

use ipfrs_core::Ipld;
use ipfrs_core::dag::map_dag;

let ipld = Ipld::Integer(42);

// Double all integers
let transformed = map_dag(&ipld, &|node| {
    match node {
        Ipld::Integer(n) => Ipld::Integer(n * 2),
        other => other.clone(),
    }
});

assert_eq!(transformed, Ipld::Integer(84));