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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CRDTP_PARSER_HANDLER_H_
#define CRDTP_PARSER_HANDLER_H_
#include <cstdint>
#include "span.h"
#include "status.h"
namespace crdtp {
// Handler interface for parser events emitted by a streaming parser.
// See cbor::NewCBOREncoder, cbor::ParseCBOR, json::NewJSONEncoder,
// json::ParseJSON.
class ParserHandler {
public:
virtual ~ParserHandler() = default;
virtual void HandleMapBegin() = 0;
virtual void HandleMapEnd() = 0;
virtual void HandleArrayBegin() = 0;
virtual void HandleArrayEnd() = 0;
virtual void HandleString8(span<uint8_t> chars) = 0;
virtual void HandleString16(span<uint16_t> chars) = 0;
virtual void HandleBinary(span<uint8_t> bytes) = 0;
virtual void HandleDouble(double value) = 0;
virtual void HandleInt32(int32_t value) = 0;
virtual void HandleBool(bool value) = 0;
virtual void HandleNull() = 0;
// The parser may send one error even after other events have already
// been received. Client code is reponsible to then discard the
// already processed events.
// |error| must be an eror, as in, |error.is_ok()| can't be true.
virtual void HandleError(Status error) = 0;
};
} // namespace crdtp
#endif // CRDTP_PARSER_HANDLER_H_
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