meld
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Meld: A template language for LLM prompts
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# Detailed Method Inventory: Transformation & State Management
Below is an evidence‐based inventory of only the transformation‐related and state‐management methods in “IStateService.ts” and “StateService.ts,” along with line references and observations about copying behavior. All line numbers refer to the snippets provided in your request.
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## 1. Transformation Methods
These methods control or respond to node transformation states.
Each entry follows the requested JSON structure:
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### getTransformedNodes
• Interface: IStateService.ts (lines 41-42)
• Implementation: StateService.ts (lines 146-149)
```json
{
"name": "getTransformedNodes",
"signature": "getTransformedNodes(): MeldNode[]",
"inInterface": true,
"inImplementation": true,
"transformationFlags": [],
"stateModification": [],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L146-149):
» return this.currentState.transformedNodes ? […this.currentState.transformedNodes] : […this.currentState.nodes];
• No mention of _transformationEnabled. Purely read‐only.
• No usage within StateService.ts snippet.
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### setTransformedNodes
• Interface: IStateService.ts (lines 43-44)
• Implementation: StateService.ts (lines 151-156)
```json
{
"name": "setTransformedNodes",
"signature": "setTransformedNodes(nodes: MeldNode[]): void",
"inInterface": true,
"inImplementation": true,
"transformationFlags": [],
"stateModification": [
"currentState.transformedNodes"
],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L151-156):
» this.checkMutable();
» this.updateState({ transformedNodes: […nodes] }, 'setTransformedNodes');
• No direct usage found in the snippet.
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### transformNode
• Interface: IStateService.ts (lines 45-46)
• Implementation: StateService.ts (lines 173-188)
```json
{
"name": "transformNode",
"signature": "transformNode(original: MeldNode, transformed: MeldNode): void",
"inInterface": true,
"inImplementation": true,
"transformationFlags": [
"_transformationEnabled"
],
"stateModification": [
"currentState.transformedNodes"
],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L179-181):
» if (!this._transformationEnabled) {
» return;
» }
• Modifies the transformedNodes array if transformation is enabled.
• Not invoked anywhere within the snippet.
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### isTransformationEnabled
• Interface: IStateService.ts (lines 47-48)
• Implementation: StateService.ts (lines 190-193)
```json
{
"name": "isTransformationEnabled",
"signature": "isTransformationEnabled(): boolean",
"inInterface": true,
"inImplementation": true,
"transformationFlags": [
"_transformationEnabled"
],
"stateModification": [],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L190-193):
» return this._transformationEnabled;
• Read‐only check, no state change.
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### enableTransformation
• Interface: IStateService.ts (lines 49-50)
• Implementation: StateService.ts (lines 195-211)
```json
{
"name": "enableTransformation",
"signature": "enableTransformation(enable: boolean): void",
"inInterface": true,
"inImplementation": true,
"transformationFlags": [
"_transformationEnabled"
],
"stateModification": [
"currentState.transformedNodes"
],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L205-209):
» if (enable) {
» this.updateState({ transformedNodes: […this.currentState.nodes] }, 'enableTransformation');
» }
• Sets _transformationEnabled and may (re)initialize transformedNodes.
• Not invoked within this snippet.
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## 2. State Management Methods
These methods handle cloning, child states, immutability, and basic “local changes” checks.
Each entry follows the requested JSON structure, noting deep vs. shallow copying.
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### createChildState
• Interface: IStateService.ts (lines 74-75)
• Implementation: StateService.ts (lines 284-290)
```json
{
"name": "createChildState",
"signature": "createChildState(): IStateService",
"inInterface": true,
"inImplementation": true,
"deepCopyFields": [],
"shallowCopyFields": [],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L287-288):
» const child = new StateService(this);
» return child;
• Does not directly copy fields; references parent state via constructor.
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### mergeChildState
• Interface: IStateService.ts (lines 76-77)
• Implementation: StateService.ts (lines 292-296)
```json
{
"name": "mergeChildState",
"signature": "mergeChildState(childState: IStateService): void",
"inInterface": true,
"inImplementation": true,
"deepCopyFields": [],
"shallowCopyFields": [],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L295):
» this.currentState = this.stateFactory.mergeStates(this.currentState, child.currentState);
• Actual merging logic is in StateFactory (not shown). Unable to confirm deep vs. shallow merges.
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### clone
• Interface: IStateService.ts (lines 78-79)
• Implementation: StateService.ts (lines 298-334)
```json
{
"name": "clone",
"signature": "clone(): IStateService",
"inInterface": true,
"inImplementation": true,
"deepCopyFields": [],
"shallowCopyFields": [
"variables.text",
"variables.data",
"variables.path",
"commands",
"nodes",
"transformedNodes",
"imports"
],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L313-321):
» variables: {
» text: new Map(this.currentState.variables.text),
» data: new Map(this.currentState.variables.data),
» path: new Map(this.currentState.variables.path)
» },
» commands: new Map(this.currentState.commands),
» nodes: […this.currentState.nodes],
» transformedNodes: this.currentState.transformedNodes ? […this.currentState.transformedNodes] : undefined,
» imports: new Set(this.currentState.imports)
• All Maps and Sets get new containers (shallow copies of entries). Actual nested objects or data remain references.
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### setImmutable
• Interface: IStateService.ts (lines 70-71)
• Implementation: StateService.ts (lines 275-277)
```json
{
"name": "setImmutable",
"signature": "setImmutable(): void",
"inInterface": true,
"inImplementation": true,
"deepCopyFields": [],
"shallowCopyFields": [],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L275-277):
» this._isImmutable = true;
• No copying performed. Prevents further modifications.
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### hasLocalChanges
• Interface: IStateService.ts (lines 66-67)
• Implementation: StateService.ts (lines 265-267)
```json
{
"name": "hasLocalChanges",
"signature": "hasLocalChanges(): boolean",
"inInterface": true,
"inImplementation": true,
"deepCopyFields": [],
"shallowCopyFields": [],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L265-267):
» return true;
• Stub implementation only. No data copying.
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### getLocalChanges
• Interface: IStateService.ts (lines 68-69)
• Implementation: StateService.ts (lines 269-272)
```json
{
"name": "getLocalChanges",
"signature": "getLocalChanges(): string[]",
"inInterface": true,
"inImplementation": true,
"deepCopyFields": [],
"shallowCopyFields": [],
"usageCount": 0
}
```
EVIDENCE & NOTES
• Code excerpt (StateService.ts, L269-272):
» return ["state"];
• Also a stub. No copying or real diff tracking.
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## 3. Observations & Recommendations
1. All transformation methods are correctly present in both interface and implementation.
• No direct usage surfaced in the snippet for transformNode, getTransformedNodes, setTransformedNodes, isTransformationEnabled, or enableTransformation.
2. The “clone()” method performs shallow copying of all state fields.
• Evidence: new Map(...) and new Set(...) only replicate references for nested objects.
• Recommendation: If true deep copying is needed (e.g., for nested objects in data variables), consider a more thorough approach.
3. “mergeChildState()” calls StateFactory’s mergeStates, but the snippet does not show if merging is deep or shallow.
• Recommendation: Confirm the final structure after merging if child states contain references or complex objects.
4. “hasLocalChanges()” and “getLocalChanges()” are hardcoded, returning “true” and [“state”].
• Recommendation: Implement or document these stubs if real local‐change tracking is required.
5. “createChildState()” references the parentState but does not copy any fields itself.
• Recommendation: Verify the intended inheritance or layering approach in StateFactory.
6. “setImmutable()” effectively locks further modification by throwing errors in checkMutable().
• No direct conflict found, but confirm that external callers respect the error path.
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# End of Method Inventory
All findings are derived strictly from the code references above. No external assumptions or tests were provided, so usage counts reflect only the immediate snippet. Please review these recommendations where deeper or specialized copying may be required.