import { ParserRuleContext } from 'antlr4ts';
import { TypeRegistry } from '../type/TypeRegistry.js';
import { BaseListener } from './baseListener.js';
export declare class NegationMutator extends BaseListener {
    private static readonly ZERO_LITERAL;
    constructor(typeRegistry?: TypeRegistry);
    enterReturnStatement(ctx: ParserRuleContext): void;
    private isNumericReturn;
    private isNegatedExpression;
    private formatNegation;
}