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docs(lath): correct replaceAtPath off-tree-path comment #363

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docs(lath): correct replaceAtPath off-tree-path comment #363

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3 changes: 2 additions & 1 deletion lib/src/lib/lath/model.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -182,7 +182,8 @@ export function normalize(node: LathNode): LathNode | null {

/** Replace the subtree at `path` (root is `[]`) with `replacement`, sharing structure
* outside the rewritten spine. Callers pass valid paths; a path that leaves the tree
* returns `replacement` unchanged from wherever the walk stopped. */
* (hits a leaf before `path` is exhausted, or names a missing child) returns the
* subtree reached so far unchanged, without inserting `replacement`. */
export function replaceAtPath(root: LathNode, path: number[], replacement: LathNode): LathNode {
if (path.length === 0) return replacement;
if (root.kind !== 'split') return root;
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