227 lines
7.4 KiB
C++
227 lines
7.4 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
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#ifndef __NUMPARSE_AFFIXES_H__
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#define __NUMPARSE_AFFIXES_H__
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#include "cmemory.h"
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#include "numparse_types.h"
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#include "numparse_symbols.h"
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#include "numparse_currency.h"
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#include "number_affixutils.h"
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#include "number_currencysymbols.h"
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U_NAMESPACE_BEGIN
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namespace numparse {
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namespace impl {
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// Forward-declaration of implementation classes for friending
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class AffixPatternMatcherBuilder;
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class AffixPatternMatcher;
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using ::icu::number::impl::AffixPatternProvider;
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using ::icu::number::impl::TokenConsumer;
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using ::icu::number::impl::CurrencySymbols;
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class U_I18N_API CodePointMatcher : public NumberParseMatcher, public UMemory {
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public:
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CodePointMatcher() = default; // WARNING: Leaves the object in an unusable state
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CodePointMatcher(UChar32 cp);
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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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UnicodeString toString() const override;
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private:
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UChar32 fCp;
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};
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} // namespace impl
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} // namespace numparse
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// Export a explicit template instantiations of MaybeStackArray, MemoryPool and CompactUnicodeString.
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// When building DLLs for Windows this is required even though no direct access 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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// Note: These need to be outside of the numparse::impl namespace, or Clang will generate a compile error.
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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<numparse::impl::CodePointMatcher*, 8>;
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template class U_I18N_API MaybeStackArray<UChar, 4>;
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template class U_I18N_API MemoryPool<numparse::impl::CodePointMatcher, 8>;
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template class U_I18N_API numparse::impl::CompactUnicodeString<4>;
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#endif
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namespace numparse {
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namespace impl {
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struct AffixTokenMatcherSetupData {
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const CurrencySymbols& currencySymbols;
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const DecimalFormatSymbols& dfs;
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IgnorablesMatcher& ignorables;
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const Locale& locale;
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parse_flags_t parseFlags;
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};
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/**
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* Small helper class that generates matchers for individual tokens for AffixPatternMatcher.
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*
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* In Java, this is called AffixTokenMatcherFactory (a "factory"). However, in C++, it is called a
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* "warehouse", because in addition to generating the matchers, it also retains ownership of them. The
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* warehouse must stay in scope for the whole lifespan of the AffixPatternMatcher that uses matchers from
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* the warehouse.
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*
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* @author sffc
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*/
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// Exported as U_I18N_API for tests
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class U_I18N_API AffixTokenMatcherWarehouse : public UMemory {
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public:
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AffixTokenMatcherWarehouse() = default; // WARNING: Leaves the object in an unusable state
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AffixTokenMatcherWarehouse(const AffixTokenMatcherSetupData* setupData);
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NumberParseMatcher& minusSign();
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NumberParseMatcher& plusSign();
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NumberParseMatcher& percent();
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NumberParseMatcher& permille();
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NumberParseMatcher& currency(UErrorCode& status);
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IgnorablesMatcher& ignorables();
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NumberParseMatcher* nextCodePointMatcher(UChar32 cp, UErrorCode& status);
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private:
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// NOTE: The following field may be unsafe to access after construction is done!
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const AffixTokenMatcherSetupData* fSetupData;
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// NOTE: These are default-constructed and should not be used until initialized.
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MinusSignMatcher fMinusSign;
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PlusSignMatcher fPlusSign;
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PercentMatcher fPercent;
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PermilleMatcher fPermille;
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CombinedCurrencyMatcher fCurrency;
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// Use a child class for code point matchers, since it requires non-default operators.
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MemoryPool<CodePointMatcher> fCodePoints;
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friend class AffixPatternMatcherBuilder;
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friend class AffixPatternMatcher;
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};
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class AffixPatternMatcherBuilder : public TokenConsumer, public MutableMatcherCollection {
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public:
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AffixPatternMatcherBuilder(const UnicodeString& pattern, AffixTokenMatcherWarehouse& warehouse,
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IgnorablesMatcher* ignorables);
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void consumeToken(::icu::number::impl::AffixPatternType type, UChar32 cp, UErrorCode& status) override;
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/** NOTE: You can build only once! */
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AffixPatternMatcher build(UErrorCode& status);
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private:
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ArraySeriesMatcher::MatcherArray fMatchers;
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int32_t fMatchersLen;
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int32_t fLastTypeOrCp;
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const UnicodeString& fPattern;
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AffixTokenMatcherWarehouse& fWarehouse;
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IgnorablesMatcher* fIgnorables;
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void addMatcher(NumberParseMatcher& matcher) override;
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};
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// Exported as U_I18N_API for tests
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class U_I18N_API AffixPatternMatcher : public ArraySeriesMatcher {
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public:
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AffixPatternMatcher() = default; // WARNING: Leaves the object in an unusable state
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static AffixPatternMatcher fromAffixPattern(const UnicodeString& affixPattern,
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AffixTokenMatcherWarehouse& warehouse,
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parse_flags_t parseFlags, bool* success,
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UErrorCode& status);
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UnicodeString getPattern() const;
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bool operator==(const AffixPatternMatcher& other) const;
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private:
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CompactUnicodeString<4> fPattern;
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AffixPatternMatcher(MatcherArray& matchers, int32_t matchersLen, const UnicodeString& pattern,
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UErrorCode& status);
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friend class AffixPatternMatcherBuilder;
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};
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class AffixMatcher : public NumberParseMatcher, public UMemory {
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public:
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AffixMatcher() = default; // WARNING: Leaves the object in an unusable state
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AffixMatcher(AffixPatternMatcher* prefix, AffixPatternMatcher* suffix, result_flags_t flags);
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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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bool smokeTest(const StringSegment& segment) const override;
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int8_t compareTo(const AffixMatcher& rhs) const;
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UnicodeString toString() const override;
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private:
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AffixPatternMatcher* fPrefix;
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AffixPatternMatcher* fSuffix;
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result_flags_t fFlags;
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};
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/**
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* A C++-only class to retain ownership of the AffixMatchers needed for parsing.
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*/
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class AffixMatcherWarehouse {
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public:
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AffixMatcherWarehouse() = default; // WARNING: Leaves the object in an unusable state
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AffixMatcherWarehouse(AffixTokenMatcherWarehouse* tokenWarehouse);
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void createAffixMatchers(const AffixPatternProvider& patternInfo, MutableMatcherCollection& output,
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const IgnorablesMatcher& ignorables, parse_flags_t parseFlags,
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UErrorCode& status);
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private:
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// 9 is the limit: positive, zero, and negative, each with prefix, suffix, and prefix+suffix
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AffixMatcher fAffixMatchers[9];
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// 6 is the limit: positive, zero, and negative, a prefix and a suffix for each
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AffixPatternMatcher fAffixPatternMatchers[6];
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// Reference to the warehouse for tokens used by the AffixPatternMatchers
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AffixTokenMatcherWarehouse* fTokenWarehouse;
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friend class AffixMatcher;
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static bool isInteresting(const AffixPatternProvider& patternInfo, const IgnorablesMatcher& ignorables,
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parse_flags_t parseFlags, UErrorCode& status);
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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 //__NUMPARSE_AFFIXES_H__
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#endif /* #if !UCONFIG_NO_FORMATTING */
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