/
RestElement.ts
47 lines (40 loc) · 1.57 KB
/
RestElement.ts
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import { HasEffectsContext } from '../ExecutionContext';
import { EMPTY_PATH, ObjectPath, UnknownKey } from '../utils/PathTracker';
import LocalVariable from '../variables/LocalVariable';
import Variable from '../variables/Variable';
import * as NodeType from './NodeType';
import { ExpressionEntity, UNKNOWN_EXPRESSION } from './shared/Expression';
import { NodeBase } from './shared/Node';
import { PatternNode } from './shared/Pattern';
export default class RestElement extends NodeBase implements PatternNode {
argument!: PatternNode;
type!: NodeType.tRestElement;
protected deoptimized = false;
private declarationInit: ExpressionEntity | null = null;
addExportedVariables(
variables: Variable[],
exportNamesByVariable: Map<Variable, 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();
}
}
}