feat(ImmutableTree): Update RenderShape to emit results in depth-first pre-order

[gibson042]

...i.e., topologically with parents before their descendants

Summary by CodeRabbit

• Bug Fixes
  • Improved the rendering logic of tree nodes, ensuring a more accurate depth-first pre-order traversal.
  • Enhanced flexibility in node encoding with updated method parameters.

[coderabbitai]

Walkthrough

The recent update to the ImmutableTree struct's renderNode method refines how nodes are rendered by eliminating unnecessary recursion and adjusting the order of appending results. This change implements a topological depth-first pre-order traversal to enhance node processing efficiency. The method signature has also been updated to improve flexibility in node encoding.

Changes

Files	Change Summary
.../immutable_tree.go	Revised renderNode method by removing inner-node recursion, altering result appending order, and updating encoder parameter type to a function.

Sequence Diagram(s)

sequenceDiagram
    participant Client
    participant ImmutableTree
    participant Node
    
    Client->>+ImmutableTree: renderNode()
    ImmutableTree->>+Node: Fetch Node Data
    Node-->>-ImmutableTree: Return Node Data
    ImmutableTree-->>Client: Return Pre-ordered Node Results

Loading

Poem

In the tree’s immutable shade,
Depths of nodes now better portrayed,
Pre-order traversed in a bliss,
No recursion's endless abyss.
The forest sings in harmony fine,
Rendering in an elegant line. 🌿

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Review profile: CHILL

📥 Commits

Files that changed from the base of the PR and between 20a30a8 and 99a7562.

📒 Files selected for processing (1)

• immutable_tree.go (1 hunks)

🧰 Additional context used

🔇 Additional comments (3)

immutable_tree.go (3)

110-110: Improved flexibility in node encoding

The updated method signature for renderNode now uses a function type for the encoder parameter. This change enhances the flexibility of the method, allowing for custom encoding strategies to be passed in easily.

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115-118: Improved traversal order and clarity in renderNode

The changes in the renderNode method implementation successfully achieve the following:

1. Implement a topological depth-first pre-order traversal, as stated in the PR objectives.
2. Enhance clarity by explicitly defining the order of results.
3. Eliminate unnecessary recursion, potentially improving performance.

The new implementation correctly processes the parent node before its subtrees, which is accurately described in the added comment. This change aligns well with the PR objectives and improves the overall structure of the method.

---

110-118: Summary of changes in immutable_tree.go

The changes in this file successfully implement the PR objectives:

1. The renderNode method now emits results in a depth-first pre-order traversal.
2. The method signature has been updated to improve flexibility in node encoding.
3. The implementation has been simplified, potentially improving performance by eliminating unnecessary recursion.

These changes enhance the clarity and efficiency of the RenderShape functionality while maintaining the overall structure of the ImmutableTree. The modifications are well-documented and align perfectly with the intended goals of the PR.

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[coderabbitai]

Actionable comments posted: 0

Review details

Configuration used: CodeRabbit UI
Review profile: CHILL

Commits

Files that changed from the base of the PR and between 0b6f1b6 and 20a30a8.

Files selected for processing (1)

• immutable_tree.go (2 hunks)

Additional comments not posted (1)

immutable_tree.go (1)

113-113: Review of depth-first pre-order changes in renderNode.

The modifications to the renderNode method align with the PR objectives to emit results in depth-first pre-order. By initializing result with here and appending left results before right, the method now correctly reflects the desired traversal order.

However, it's crucial to ensure that all error handling and recursive calls are correctly managed to avoid potential issues during tree traversal, especially with large or complex trees.

Also applies to: 118-120

[cool-develope]

lgtm!