111 lines
2.9 KiB
C++
111 lines
2.9 KiB
C++
// © 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 && !UPRV_INCOMPLETE_CPP11_SUPPORT
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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 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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class 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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/**
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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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void postProcess(ParsedNumber& result) const override;
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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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class 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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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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class 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<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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const UnicodeSet& getLeadCodePoints() override;
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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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