/**
 * ANTLR error listener that collects lexer and parser diagnostics into
 * a shared array instead of writing them to stderr (ANTLR's default).
 *
 * A single listener instance is wired to both the lexer and the parser
 * so all diagnostics end up in one ordered collection, making
 * multi-error reporting straightforward.
 */
import { BaseErrorListener, Token, type ATNSimulator, type RecognitionException, type Recognizer } from 'antlr4ng';
import type { ParserDiagnostic } from './errors.js';
export declare class DiagnosticCollector extends BaseErrorListener {
    private readonly collected;
    syntaxError<T extends ATNSimulator>(recognizer: Recognizer<T>, offendingSymbol: Token | number | null, line: number, charPositionInLine: number, msg: string, _e: RecognitionException | null): void;
    get diagnostics(): readonly ParserDiagnostic[];
}
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