/
NewExpression.ts
51 lines (46 loc) · 1.48 KB
/
NewExpression.ts
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import { NormalizedTreeshakingOptions } from '../../rollup/types';
import { CallOptions } from '../CallOptions';
import { HasEffectsContext } from '../ExecutionContext';
import { EMPTY_PATH, ObjectPath, UNKNOWN_PATH } from '../utils/PathTracker';
import * as NodeType from './NodeType';
import { ExpressionNode, NodeBase } from './shared/Node';
export default class NewExpression extends NodeBase {
arguments!: ExpressionNode[];
callee!: ExpressionNode;
type!: NodeType.tNewExpression;
protected deoptimized = false;
private callOptions!: CallOptions;
hasEffects(context: HasEffectsContext): boolean {
if (!this.deoptimized) this.applyDeoptimizations();
for (const argument of this.arguments) {
if (argument.hasEffects(context)) return true;
}
if (
(this.context.options.treeshake as NormalizedTreeshakingOptions).annotations &&
this.annotations
)
return false;
return (
this.callee.hasEffects(context) ||
this.callee.hasEffectsWhenCalledAtPath(EMPTY_PATH, this.callOptions, context)
);
}
hasEffectsWhenAccessedAtPath(path: ObjectPath): boolean {
return path.length > 0;
}
initialise(): void {
this.callOptions = {
args: this.arguments,
thisParam: null,
withNew: true
};
}
protected applyDeoptimizations(): void {
this.deoptimized = true;
for (const argument of this.arguments) {
// This will make sure all properties of parameters behave as "unknown"
argument.deoptimizePath(UNKNOWN_PATH);
}
this.context.requestTreeshakingPass();
}
}