diff --git a/docs/userguide/format_parse/numbers/skeletons.md b/docs/userguide/format_parse/numbers/skeletons.md
index fa30ba1eddc..3ef41c2834d 100644
--- a/docs/userguide/format_parse/numbers/skeletons.md
+++ b/docs/userguide/format_parse/numbers/skeletons.md
@@ -299,6 +299,7 @@ integer digits):
| `integer-width/##0` | - | Between 1 and 3
integer digits | `IntegerWidth::zeroFillTo(1)`
`.truncateAt(3)`
| `integer-width/00` | - | Exactly 2
integer digits | `IntegerWidth::zeroFillTo(2)`
`.truncateAt(2)` |
| `integer-width/*` | - | Zero or more
integer digits | `IntegerWidth::zeroFillTo(0) `
+| `integer-width-trunc` | - | Zero integer digits | `IntegerWidth::zeroFillTo(0)`
`.truncateAt(0)`
The long-form option starts with either a single `*` symbol, signaling no limit
on the number of integer digits (no *`truncateAt`*), or zero or more `#` symbols.
@@ -310,6 +311,8 @@ symbols plus the number of `0` symbols.
The concise skeleton is simply one or more `0` characters. This supports
minimum integer digits but not maximum integer digits.
+The special stem `integer-width-trunc` covers the case when both *`truncateAt`* and *`zeroFillTo`* are zero.
+
***Prior to ICU 67***, use the symbol `+` instead of `*`.
### Scale
diff --git a/icu4c/source/i18n/number_skeletons.cpp b/icu4c/source/i18n/number_skeletons.cpp
index 97d74303a43..0aa03f5aeb3 100644
--- a/icu4c/source/i18n/number_skeletons.cpp
+++ b/icu4c/source/i18n/number_skeletons.cpp
@@ -74,6 +74,7 @@ void U_CALLCONV initNumberSkeletons(UErrorCode& status) {
b.add(u"rounding-mode-half-down", STEM_ROUNDING_MODE_HALF_DOWN, status);
b.add(u"rounding-mode-half-up", STEM_ROUNDING_MODE_HALF_UP, status);
b.add(u"rounding-mode-unnecessary", STEM_ROUNDING_MODE_UNNECESSARY, status);
+ b.add(u"integer-width-trunc", STEM_INTEGER_WIDTH_TRUNC, status);
b.add(u"group-off", STEM_GROUP_OFF, status);
b.add(u"group-min2", STEM_GROUP_MIN2, status);
b.add(u"group-auto", STEM_GROUP_AUTO, status);
@@ -700,6 +701,11 @@ skeleton::parseStem(const StringSegment& segment, const UCharsTrie& stemTrie, Se
macros.roundingMode = stem_to_object::roundingMode(stem);
return STATE_NULL;
+ case STEM_INTEGER_WIDTH_TRUNC:
+ CHECK_NULL(seen, integerWidth, status);
+ macros.integerWidth = IntegerWidth::zeroFillTo(0).truncateAt(0);
+ return STATE_NULL;
+
case STEM_GROUP_OFF:
case STEM_GROUP_MIN2:
case STEM_GROUP_AUTO:
@@ -1677,10 +1683,15 @@ bool GeneratorHelpers::integerWidth(const MacroProps& macros, UnicodeString& sb,
// Error or Default
return false;
}
+ const auto& minMaxInt = macros.integerWidth.fUnion.minMaxInt;
+ if (minMaxInt.fMinInt == 0 && minMaxInt.fMaxInt == 0) {
+ sb.append(u"integer-width-trunc", -1);
+ return true;
+ }
sb.append(u"integer-width/", -1);
blueprint_helpers::generateIntegerWidthOption(
- macros.integerWidth.fUnion.minMaxInt.fMinInt,
- macros.integerWidth.fUnion.minMaxInt.fMaxInt,
+ minMaxInt.fMinInt,
+ minMaxInt.fMaxInt,
sb,
status);
return true;
diff --git a/icu4c/source/i18n/number_skeletons.h b/icu4c/source/i18n/number_skeletons.h
index af636504283..a34e4242095 100644
--- a/icu4c/source/i18n/number_skeletons.h
+++ b/icu4c/source/i18n/number_skeletons.h
@@ -92,6 +92,7 @@ enum StemEnum {
STEM_ROUNDING_MODE_HALF_DOWN,
STEM_ROUNDING_MODE_HALF_UP,
STEM_ROUNDING_MODE_UNNECESSARY,
+ STEM_INTEGER_WIDTH_TRUNC,
STEM_GROUP_OFF,
STEM_GROUP_MIN2,
STEM_GROUP_AUTO,
diff --git a/icu4c/source/test/intltest/numbertest_api.cpp b/icu4c/source/test/intltest/numbertest_api.cpp
index b0aa5b45284..cc07d857951 100644
--- a/icu4c/source/test/intltest/numbertest_api.cpp
+++ b/icu4c/source/test/intltest/numbertest_api.cpp
@@ -3838,6 +3838,41 @@ void NumberFormatterApiTest::integerWidth() {
// Note: this double produces all 17 significant digits
10000000000000002000.0,
u"00");
+
+ assertFormatDescending(
+ u"Integer Width Double Zero (ICU-21590)",
+ u"integer-width-trunc",
+ u"integer-width-trunc",
+ NumberFormatter::with()
+ .integerWidth(IntegerWidth::zeroFillTo(0).truncateAt(0)),
+ Locale::getEnglish(),
+ u"0",
+ u"0",
+ u".5",
+ u".65",
+ u".765",
+ u".8765",
+ u".08765",
+ u".008765",
+ u"0");
+
+ assertFormatDescending(
+ u"Integer Width Double Zero with minFraction (ICU-21590)",
+ u"integer-width-trunc .0*",
+ u"integer-width-trunc .0*",
+ NumberFormatter::with()
+ .integerWidth(IntegerWidth::zeroFillTo(0).truncateAt(0))
+ .precision(Precision::minFraction(1)),
+ Locale::getEnglish(),
+ u".0",
+ u".0",
+ u".5",
+ u".65",
+ u".765",
+ u".8765",
+ u".08765",
+ u".008765",
+ u".0");
}
void NumberFormatterApiTest::symbols() {
diff --git a/icu4j/main/classes/core/src/com/ibm/icu/number/NumberSkeletonImpl.java b/icu4j/main/classes/core/src/com/ibm/icu/number/NumberSkeletonImpl.java
index 54555d88c24..c9e0369c5f9 100644
--- a/icu4j/main/classes/core/src/com/ibm/icu/number/NumberSkeletonImpl.java
+++ b/icu4j/main/classes/core/src/com/ibm/icu/number/NumberSkeletonImpl.java
@@ -96,6 +96,7 @@ class NumberSkeletonImpl {
STEM_ROUNDING_MODE_HALF_DOWN,
STEM_ROUNDING_MODE_HALF_UP,
STEM_ROUNDING_MODE_UNNECESSARY,
+ STEM_INTEGER_WIDTH_TRUNC,
STEM_GROUP_OFF,
STEM_GROUP_MIN2,
STEM_GROUP_AUTO,
@@ -174,6 +175,7 @@ class NumberSkeletonImpl {
b.add("rounding-mode-half-down", StemEnum.STEM_ROUNDING_MODE_HALF_DOWN.ordinal());
b.add("rounding-mode-half-up", StemEnum.STEM_ROUNDING_MODE_HALF_UP.ordinal());
b.add("rounding-mode-unnecessary", StemEnum.STEM_ROUNDING_MODE_UNNECESSARY.ordinal());
+ b.add("integer-width-trunc", StemEnum.STEM_INTEGER_WIDTH_TRUNC.ordinal());
b.add("group-off", StemEnum.STEM_GROUP_OFF.ordinal());
b.add("group-min2", StemEnum.STEM_GROUP_MIN2.ordinal());
b.add("group-auto", StemEnum.STEM_GROUP_AUTO.ordinal());
@@ -751,6 +753,11 @@ class NumberSkeletonImpl {
macros.roundingMode = StemToObject.roundingMode(stem);
return ParseState.STATE_NULL;
+ case STEM_INTEGER_WIDTH_TRUNC:
+ checkNull(macros.integerWidth, segment);
+ macros.integerWidth = IntegerWidth.zeroFillTo(0).truncateAt(0);
+ return ParseState.STATE_NULL;
+
case STEM_GROUP_OFF:
case STEM_GROUP_MIN2:
case STEM_GROUP_AUTO:
@@ -1623,6 +1630,10 @@ class NumberSkeletonImpl {
if (macros.integerWidth.equals(IntegerWidth.DEFAULT)) {
return false; // Default
}
+ if (macros.integerWidth.minInt == 0 && macros.integerWidth.maxInt == 0) {
+ sb.append("integer-width-trunc");
+ return true;
+ }
sb.append("integer-width/");
BlueprintHelpers.generateIntegerWidthOption(macros.integerWidth.minInt,
macros.integerWidth.maxInt,
diff --git a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/number/NumberFormatterApiTest.java b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/number/NumberFormatterApiTest.java
index 4f910daad9b..9cf6e614982 100644
--- a/icu4j/main/tests/core/src/com/ibm/icu/dev/test/number/NumberFormatterApiTest.java
+++ b/icu4j/main/tests/core/src/com/ibm/icu/dev/test/number/NumberFormatterApiTest.java
@@ -3799,6 +3799,41 @@ public class NumberFormatterApiTest extends TestFmwk {
// Note: this double produces all 17 significant digits
10000000000000002000.0,
"00");
+
+ assertFormatDescending(
+ "Integer Width Double Zero (ICU-21590)",
+ "integer-width-trunc",
+ "integer-width-trunc",
+ NumberFormatter.with()
+ .integerWidth(IntegerWidth.zeroFillTo(0).truncateAt(0)),
+ ULocale.ENGLISH,
+ "0",
+ "0",
+ ".5",
+ ".65",
+ ".765",
+ ".8765",
+ ".08765",
+ ".008765",
+ "0");
+
+ assertFormatDescending(
+ "Integer Width Double Zero with minFraction (ICU-21590)",
+ "integer-width-trunc .0*",
+ "integer-width-trunc .0*",
+ NumberFormatter.with()
+ .integerWidth(IntegerWidth.zeroFillTo(0).truncateAt(0))
+ .precision(Precision.minFraction(1)),
+ ULocale.ENGLISH,
+ ".0",
+ ".0",
+ ".5",
+ ".65",
+ ".765",
+ ".8765",
+ ".08765",
+ ".008765",
+ ".0");
}
@Test