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65 lines
2.2 KiB
65 lines
2.2 KiB
/*
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef LIBTEXTCLASSIFIER_UTILS_GRAMMAR_ANALYZER_H_
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#define LIBTEXTCLASSIFIER_UTILS_GRAMMAR_ANALYZER_H_
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#include "utils/base/arena.h"
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#include "utils/base/statusor.h"
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#include "utils/grammar/evaluated-derivation.h"
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#include "utils/grammar/parsing/parser.h"
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#include "utils/grammar/semantics/composer.h"
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#include "utils/grammar/text-context.h"
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#include "utils/i18n/locale.h"
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#include "utils/tokenizer.h"
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#include "utils/utf8/unilib.h"
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namespace libtextclassifier3::grammar {
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// An analyzer that parses and semantically evaluates an input text with a
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// grammar.
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class Analyzer {
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public:
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explicit Analyzer(const UniLib* unilib, const RulesSet* rules_set);
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explicit Analyzer(const UniLib* unilib, const RulesSet* rules_set,
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const Tokenizer* tokenizer);
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// Parses and evaluates an input.
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StatusOr<std::vector<EvaluatedDerivation>> Parse(
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const TextContext& input, UnsafeArena* arena,
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bool deduplicate_derivations = true) const;
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StatusOr<std::vector<EvaluatedDerivation>> Parse(
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const UnicodeText& text, const std::vector<Locale>& locales,
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UnsafeArena* arena, bool deduplicate_derivations = true) const;
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// Pre-processes an input text for parsing.
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TextContext BuildTextContextForInput(
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const UnicodeText& text, const std::vector<Locale>& locales = {}) const;
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const Parser& parser() const { return parser_; }
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private:
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std::unique_ptr<Tokenizer> owned_tokenizer_;
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const Tokenizer* tokenizer_;
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Parser parser_;
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SemanticComposer semantic_evaluator_;
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};
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} // namespace libtextclassifier3::grammar
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#endif // LIBTEXTCLASSIFIER_UTILS_GRAMMAR_ANALYZER_H_
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