1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
/*
* Open Chinese Convert
*
* Copyright 2010-2014 Carbo Kuo <byvoid@byvoid.com>
*
* 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.
*/
#pragma once
#include <list>
#include "Common.hpp"
#include "Conversion.hpp"
namespace opencc {
/**
* An ordered sequence of @c Conversion objects applied to pre-segmented text.
*
* Each @c Conversion in the chain wraps one dictionary. The chain applies
* them in order: the output segments of conversion N become the input of
* conversion N+1. This enables priority-ordered substitution, such as
* applying phrase dictionaries before character dictionaries so that
* multi-character matches take precedence.
*
* A @c ConversionChain operates on @c Segments (output of @c Segmentation)
* and has no knowledge of how those segments were produced.
*
* @ingroup opencc_cpp_api
*/
class OPENCC_EXPORT ConversionChain {
public:
/** Constructs a chain from an ordered list of conversions. */
ConversionChain(const std::list<ConversionPtr> _conversions);
/**
* Passes @p input through every conversion in the chain sequentially and
* returns the final @c Segments.
*/
SegmentsPtr Convert(const SegmentsPtr& input) const;
/**
* Converts the null-terminated @p segment through all conversions and
* appends the result to @p output. This is the hot-path entry point used
* by @c SingleStageConverter to avoid intermediate string allocations.
*/
void AppendConvertedSegment(const char* segment, std::string* output) const;
/**
* Like @c AppendConvertedSegment(const char*, std::string*) but accepts the
* segment as a @c string_view, avoiding a copy when the caller already has a
* non-null-terminated view (e.g. @c SingleStageConverter with no
* segmentation).
*/
void AppendConvertedSegment(std::string_view segment,
std::string* output) const;
/**
* Converts @p input through the chain and records every intermediate
* @c Segments after each conversion stage.
* @return One entry per conversion in the chain, in order.
*/
std::vector<SegmentsPtr> ConvertWithTrace(const SegmentsPtr& input) const;
/** Returns the list of conversions in application order. */
const std::list<ConversionPtr> GetConversions() const { return conversions; }
private:
const std::list<ConversionPtr> conversions;
};
} // namespace opencc