Victor Chang | 7322950 | 2020-09-17 13:39:19 +0100 | [diff] [blame] | 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 */ |