/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
 * Use of this file is governed by the BSD 3-clause license that
 * can be found in the LICENSE.txt file in the project root.
 */

#pragma once

#include "ANTLRErrorListener.h"
#include "Exceptions.h"

namespace antlr4 {

/// This implementation of ANTLRErrorListener dispatches all calls to a
/// collection of delegate listeners. This reduces the effort required to support multiple
/// listeners.
class ANTLR4CPP_PUBLIC ProxyErrorListener : public ANTLRErrorListener {
private:
    std::set<ANTLRErrorListener*> _delegates; // Not owned.

public:
    void addErrorListener(ANTLRErrorListener* listener);
    void removeErrorListener(ANTLRErrorListener* listener);
    void removeErrorListeners();

    void syntaxError(Recognizer* recognizer, Token* offendingSymbol, size_t line,
        size_t charPositionInLine, const std::string& msg, std::exception_ptr e) override;

    virtual void reportAmbiguity(Parser* recognizer, const dfa::DFA& dfa, size_t startIndex,
        size_t stopIndex, bool exact, const antlrcpp::BitSet& ambigAlts,
        atn::ATNConfigSet* configs) override;

    virtual void reportAttemptingFullContext(Parser* recognizer, const dfa::DFA& dfa,
        size_t startIndex, size_t stopIndex, const antlrcpp::BitSet& conflictingAlts,
        atn::ATNConfigSet* configs) override;

    virtual void reportContextSensitivity(Parser* recognizer, const dfa::DFA& dfa,
        size_t startIndex, size_t stopIndex, size_t prediction,
        atn::ATNConfigSet* configs) override;
};

} // namespace antlr4
