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RestElement.ts
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RestElement.ts
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import type { HasEffectsContext } from '../ExecutionContext';
import { EMPTY_PATH, type ObjectPath, UnknownKey } from '../utils/PathTracker';
import type LocalVariable from '../variables/LocalVariable';
import type Variable from '../variables/Variable';
import type * as NodeType from './NodeType';
import { type ExpressionEntity, UNKNOWN_EXPRESSION } from './shared/Expression';
import { NodeBase } from './shared/Node';
import type { PatternNode } from './shared/Pattern';
export default class RestElement extends NodeBase implements PatternNode {
declare argument: PatternNode;
declare type: NodeType.tRestElement;
private declarationInit: ExpressionEntity | null = null;
addExportedVariables(
variables: readonly Variable[],
exportNamesByVariable: ReadonlyMap<Variable, readonly string[]>
): void {
this.argument.addExportedVariables(variables, exportNamesByVariable);
}
declare(kind: string, init: ExpressionEntity): LocalVariable[] {
this.declarationInit = init;
return this.argument.declare(kind, UNKNOWN_EXPRESSION);
}
deoptimizePath(path: ObjectPath): void {
path.length === 0 && this.argument.deoptimizePath(EMPTY_PATH);
}
hasEffectsWhenAssignedAtPath(path: ObjectPath, context: HasEffectsContext): boolean {
return path.length > 0 || this.argument.hasEffectsWhenAssignedAtPath(EMPTY_PATH, context);
}
markDeclarationReached(): void {
this.argument.markDeclarationReached();
}
protected applyDeoptimizations(): void {
this.deoptimized = true;
if (this.declarationInit !== null) {
this.declarationInit.deoptimizePath([UnknownKey, UnknownKey]);
this.context.requestTreeshakingPass();
}
}
}