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125 lines
3.8 KiB
125 lines
3.8 KiB
4 months ago
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// © 2018 and later: Unicode, Inc. and others.
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// License & terms of use: http://www.unicode.org/copyright.html
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_FORMATTING
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#ifndef __SOURCE_NUMPARSE_COMPOSITIONS__
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#define __SOURCE_NUMPARSE_COMPOSITIONS__
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#include "numparse_types.h"
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U_NAMESPACE_BEGIN
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// Export an explicit template instantiation of the MaybeStackArray that is used as a data member of ArraySeriesMatcher.
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// When building DLLs for Windows this is required even though no direct access to the MaybeStackArray leaks out of the i18n library.
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// (See digitlst.h, pluralaffix.h, datefmt.h, and others for similar examples.)
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#if U_PF_WINDOWS <= U_PLATFORM && U_PLATFORM <= U_PF_CYGWIN
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template class U_I18N_API MaybeStackArray<const numparse::impl::NumberParseMatcher*, 3>;
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#endif
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namespace numparse {
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namespace impl {
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/**
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* Base class for AnyMatcher and SeriesMatcher.
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*/
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// Exported as U_I18N_API for tests
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class U_I18N_API CompositionMatcher : public NumberParseMatcher {
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protected:
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// No construction except by subclasses!
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CompositionMatcher() = default;
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// To be overridden by subclasses (used for iteration):
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virtual const NumberParseMatcher* const* begin() const = 0;
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// To be overridden by subclasses (used for iteration):
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virtual const NumberParseMatcher* const* end() const = 0;
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};
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// NOTE: AnyMatcher is no longer being used. The previous definition is shown below.
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// The implementation can be found in SVN source control, deleted around March 30, 2018.
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///**
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// * Composes a number of matchers, and succeeds if any of the matchers succeed. Always greedily chooses
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// * the first matcher in the list to succeed.
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// *
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// * NOTE: In C++, this is a base class, unlike ICU4J, which uses a factory-style interface.
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// *
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// * @author sffc
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// * @see SeriesMatcher
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// */
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//class AnyMatcher : public CompositionMatcher {
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// public:
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// bool match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const override;
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//
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// bool smokeTest(const StringSegment& segment) const override;
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//
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// void postProcess(ParsedNumber& result) const override;
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//
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// protected:
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// // No construction except by subclasses!
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// AnyMatcher() = default;
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//};
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/**
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* Composes a number of matchers, running one after another. Matches the input string only if all of the
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* matchers in the series succeed. Performs greedy matches within the context of the series.
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*
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* @author sffc
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* @see AnyMatcher
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*/
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// Exported as U_I18N_API for tests
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class U_I18N_API SeriesMatcher : public CompositionMatcher {
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public:
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bool match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const override;
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bool smokeTest(const StringSegment& segment) const override;
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void postProcess(ParsedNumber& result) const override;
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virtual int32_t length() const = 0;
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protected:
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// No construction except by subclasses!
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SeriesMatcher() = default;
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};
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/**
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* An implementation of SeriesMatcher that references an array of matchers.
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*
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* The object adopts the array, but NOT the matchers contained inside the array.
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*/
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// Exported as U_I18N_API for tests
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class U_I18N_API ArraySeriesMatcher : public SeriesMatcher {
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public:
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ArraySeriesMatcher(); // WARNING: Leaves the object in an unusable state
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typedef MaybeStackArray<const NumberParseMatcher*, 3> MatcherArray;
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/** The array is std::move'd */
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ArraySeriesMatcher(MatcherArray& matchers, int32_t matchersLen);
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UnicodeString toString() const override;
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int32_t length() const override;
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protected:
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const NumberParseMatcher* const* begin() const override;
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const NumberParseMatcher* const* end() const override;
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private:
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MatcherArray fMatchers;
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int32_t fMatchersLen;
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};
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} // namespace impl
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} // namespace numparse
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U_NAMESPACE_END
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#endif //__SOURCE_NUMPARSE_COMPOSITIONS__
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#endif /* #if !UCONFIG_NO_FORMATTING */
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