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// Copyright (C) 2019 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#ifndef ICING_TOKENIZATION_TOKEN_H_
#define ICING_TOKENIZATION_TOKEN_H_
#include <string_view>
namespace icing {
namespace lib {
struct Token {
enum Type {
// Common types
REGULAR, // A token without special meanings, the value of it will be
// indexed or searched directly
VERBATIM, // A token that should be indexed and searched without any
// modifications to the raw text
// Types only used in raw query
QUERY_OR, // Indicates OR logic between its left and right tokens
QUERY_EXCLUSION, // Indicates exclusion operation on next token
QUERY_PROPERTY, // Indicates property restrict on next token
QUERY_LEFT_PARENTHESES, // Left parentheses
QUERY_RIGHT_PARENTHESES, // Right parentheses
// Indicates errors
INVALID,
};
// The input text should outlive the Token instance.
explicit Token(Type type_in, std::string_view text_in = "")
: type(type_in), text(text_in) {}
// The type of token
const Type type;
// The content of token
const std::string_view text;
};
} // namespace lib
} // namespace icing
#endif // ICING_TOKENIZATION_TOKEN_H_
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