1 files changed, 108 insertions, 0 deletions
diff --git a/intl/icu/source/i18n/numparse_compositions.cpp b/intl/icu/source/i18n/numparse_compositions.cpp
new file mode 100644
index 0000000000..2f7e1ab28d
--- /dev/null
+++ b/intl/icu/source/i18n/numparse_compositions.cpp
@@ -0,0 +1,108 @@
+// © 2018 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+
+#include "unicode/utypes.h"
+
+#if !UCONFIG_NO_FORMATTING
+
+// Allow implicit conversion from char16_t* to UnicodeString for this file:
+// Helpful in toString methods and elsewhere.
+#define UNISTR_FROM_STRING_EXPLICIT
+
+#include "numparse_types.h"
+#include "numparse_compositions.h"
+#include "string_segment.h"
+#include "unicode/uniset.h"
+
+using namespace icu;
+using namespace icu::numparse;
+using namespace icu::numparse::impl;
+
+
+bool SeriesMatcher::match(StringSegment& segment, ParsedNumber& result, UErrorCode& status) const {
+    ParsedNumber backup(result);
+
+    int32_t initialOffset = segment.getOffset();
+    bool maybeMore = true;
+    for (auto* it = begin(); it < end();) {
+        const NumberParseMatcher* matcher = *it;
+        int matcherOffset = segment.getOffset();
+        if (segment.length() != 0) {
+            maybeMore = matcher->match(segment, result, status);
+        } else {
+            // Nothing for this matcher to match; ask for more.
+            maybeMore = true;
+        }
+
+        bool success = (segment.getOffset() != matcherOffset);
+        bool isFlexible = matcher->isFlexible();
+        if (success && isFlexible) {
+            // Match succeeded, and this is a flexible matcher. Re-run it.
+        } else if (success) {
+            // Match succeeded, and this is NOT a flexible matcher. Proceed to the next matcher.
+            it++;
+            // Small hack: if there is another matcher coming, do not accept trailing weak chars.
+            // Needed for proper handling of currency spacing.
+            if (it < end() && segment.getOffset() != result.charEnd && result.charEnd > matcherOffset) {
+                segment.setOffset(result.charEnd);
+            }
+        } else if (isFlexible) {
+            // Match failed, and this is a flexible matcher. Try again with the next matcher.
+            it++;
+        } else {
+            // Match failed, and this is NOT a flexible matcher. Exit.
+            segment.setOffset(initialOffset);
+            result = backup;
+            return maybeMore;
+        }
+    }
+
+    // All matchers in the series succeeded.
+    return maybeMore;
+}
+
+bool SeriesMatcher::smokeTest(const StringSegment& segment) const {
+    // NOTE: The range-based for loop calls the virtual begin() and end() methods.
+    // NOTE: We only want the first element. Use the for loop for boundary checking.
+    for (auto& matcher : *this) {
+        // SeriesMatchers are never allowed to start with a Flexible matcher.
+        U_ASSERT(!matcher->isFlexible());
+        return matcher->smokeTest(segment);
+    }
+    return false;
+}
+
+void SeriesMatcher::postProcess(ParsedNumber& result) const {
+    // NOTE: The range-based for loop calls the virtual begin() and end() methods.
+    for (auto* matcher : *this) {
+        matcher->postProcess(result);
+    }
+}
+
+
+ArraySeriesMatcher::ArraySeriesMatcher()
+        : fMatchersLen(0) {
+}
+
+ArraySeriesMatcher::ArraySeriesMatcher(MatcherArray& matchers, int32_t matchersLen)
+        : fMatchers(std::move(matchers)), fMatchersLen(matchersLen) {
+}
+
+int32_t ArraySeriesMatcher::length() const {
+    return fMatchersLen;
+}
+
+const NumberParseMatcher* const* ArraySeriesMatcher::begin() const {
+    return fMatchers.getAlias();
+}
+
+const NumberParseMatcher* const* ArraySeriesMatcher::end() const {
+    return fMatchers.getAlias() + fMatchersLen;
+}
+
+UnicodeString ArraySeriesMatcher::toString() const {
+    return u"<ArraySeries>";
+}
+
+
+#endif /* #if !UCONFIG_NO_FORMATTING */