# join

Formats ordered Path AST nodes as a normalized route string.

## Signatures

```ts
export declare function join<const Parts extends ReadonlyArray<PathAst>>(asts: Parts): Join<Parts>;
```

## Why

Route values derive their public path from the same AST used for schemas and matching.

## Ownership and lifetime

`join` formats immediately into a new string and retains neither the AST array nor its nodes.