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1 // © 2018 and later: Unicode, Inc. and others.
2 // License & terms of use: http://www.unicode.org/copyright.html
3 
4 #include "unicode/utypes.h"
5 
6 #if !UCONFIG_NO_FORMATTING
7 #ifndef __SOURCE_NUMPARSE_COMPOSITIONS__
8 #define __SOURCE_NUMPARSE_COMPOSITIONS__
9 
10 #include "numparse_types.h"
11 
12 U_NAMESPACE_BEGIN
13 
14 // Export an explicit template instantiation of the MaybeStackArray that is used as a data member of ArraySeriesMatcher.
15 // When building DLLs for Windows this is required even though no direct access to the MaybeStackArray leaks out of the i18n library.
16 // (See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.)
17 #if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
18 template class U_I18N_API MaybeStackArray<const numparse::impl::NumberParseMatcher*, 3>;
19 #endif
20 
21 namespace numparse {
22 namespace impl {
23 
24 /**
25  * Base class for AnyMatcher and SeriesMatcher.
26  */
27 // Exported as U_I18N_API for tests
28 class U_I18N_API CompositionMatcher : public NumberParseMatcher {
29   protected:
30     // No construction except by subclasses!
31     CompositionMatcher() = default;
32 
33     // To be overridden by subclasses (used for iteration):
34     virtual const NumberParseMatcher* const* begin() const = 0;
35 
36     // To be overridden by subclasses (used for iteration):
37     virtual const NumberParseMatcher* const* end() const = 0;
38 };
39 
40 
41 // NOTE: AnyMatcher is no longer being used. The previous definition is shown below.
42 // The implementation can be found in SVN source control, deleted around March 30, 2018.
43 ///**
44 // * Composes a number of matchers, and succeeds if any of the matchers succeed. Always greedily chooses
45 // * the first matcher in the list to succeed.
46 // *
47 // * NOTE: In C++, this is a base class, unlike ICU4J, which uses a factory-style interface.
48 // *
49 // * @author sffc
50 // * @see SeriesMatcher
51 // */
52 //class AnyMatcher : public CompositionMatcher {
53 //  public:
54 //    bool match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const override;
55 //
56 //    bool smokeTest(const StringSegment& segment) const override;
57 //
58 //    void postProcess(ParsedNumber& result) const override;
59 //
60 //  protected:
61 //    // No construction except by subclasses!
62 //    AnyMatcher() = default;
63 //};
64 
65 
66 /**
67  * Composes a number of matchers, running one after another. Matches the input string only if all of the
68  * matchers in the series succeed. Performs greedy matches within the context of the series.
69  *
70  * @author sffc
71  * @see AnyMatcher
72  */
73 // Exported as U_I18N_API for tests
74 class U_I18N_API SeriesMatcher : public CompositionMatcher {
75   public:
76     bool match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const override;
77 
78     bool smokeTest(const StringSegment& segment) const override;
79 
80     void postProcess(ParsedNumber& result) const override;
81 
82     virtual int32_t length() const = 0;
83 
84   protected:
85     // No construction except by subclasses!
86     SeriesMatcher() = default;
87 };
88 
89 /**
90  * An implementation of SeriesMatcher that references an array of matchers.
91  *
92  * The object adopts the array, but NOT the matchers contained inside the array.
93  */
94 // Exported as U_I18N_API for tests
95 class U_I18N_API ArraySeriesMatcher : public SeriesMatcher {
96   public:
97     ArraySeriesMatcher();  // WARNING: Leaves the object in an unusable state
98 
99     typedef MaybeStackArray<const NumberParseMatcher*, 3> MatcherArray;
100 
101     /** The array is std::move'd */
102     ArraySeriesMatcher(MatcherArray& matchers, int32_t matchersLen);
103 
104     UnicodeString toString() const override;
105 
106     int32_t length() const override;
107 
108   protected:
109     const NumberParseMatcher* const* begin() const override;
110 
111     const NumberParseMatcher* const* end() const override;
112 
113   private:
114     MatcherArray fMatchers;
115     int32_t fMatchersLen;
116 };
117 
118 
119 } // namespace impl
120 } // namespace numparse
121 U_NAMESPACE_END
122 
123 #endif //__SOURCE_NUMPARSE_COMPOSITIONS__
124 #endif /* #if !UCONFIG_NO_FORMATTING */
125