From 0e8e317adb605fe3662b84f90e34fe17af4ce879 Mon Sep 17 00:00:00 2001
From: xuhangqi <xuhangqi@huawei.com>
Date: Mon, 4 Aug 2025 11:15:54 +0800
Subject: [PATCH] Language overload

Issue: https://gitee.com/openharmony/interface_sdk-js/issues/ICP8HE
Signed-off-by: xuhangqi <xuhangqi@huawei.com>
Change-Id: I287b2df485019431400bb3a387cfa88360ea521b
---
 api/@ohos.buffer.d.ts           |   7 -
 api/@ohos.util.stream.d.ts      |  19 +-
 arkts/@arkts.math.Decimal.d.ets | 580 ++++++++++++++++++++++++++++----
 3 files changed, 523 insertions(+), 83 deletions(-)

diff --git a/api/@ohos.buffer.d.ts b/api/@ohos.buffer.d.ts
index 884b5ed545..07478c41ee 100644
--- a/api/@ohos.buffer.d.ts
+++ b/api/@ohos.buffer.d.ts
@@ -691,13 +691,6 @@ declare namespace buffer {
   function fromWithStringTypedInputEncoding(input: string, encoding?: BufferEncoding): Buffer;
 
   /**
-   * Creates a Buffer instance based on a string in the given encoding format.
-   *
-   * @overload { fromWithArray, fromWithArrayBufferByteOffsetLength, fromWithBuffer,
-                fromWithObjectTypedInputOffsetOrEncodingLength, fromWithStringTypedInputEncoding }
-   * @syscap SystemCapability.Utils.Lang
-   * @crossplatform
-   * @atomicservice
    * @since 20
    * @arkts 1.2
    */
diff --git a/api/@ohos.util.stream.d.ts b/api/@ohos.util.stream.d.ts
index 6b18412378..0a689048b2 100644
--- a/api/@ohos.util.stream.d.ts
+++ b/api/@ohos.util.stream.d.ts
@@ -407,11 +407,26 @@ declare namespace stream {
      * @syscap SystemCapability.Utils.Lang
      * @crossplatform
      * @atomicservice
-     * @since arkts {'1.1':'12', '1.2':'20'}
-     * @arkts 1.1&1.2
+     * @since 12
      */
     constructor(options: ReadableOptions);
 
+    /**
+     * The Readable constructor.
+     *
+     * @param { ReadableOptions } options - Provide options.
+     * @syscap SystemCapability.Utils.Lang
+     * @since 20
+     * @arkts 1.2
+     */
+    constructor fromOptions(options: ReadableOptions);
+
+    /**
+     * @since 20
+     * @arkts 1.2
+     */
+    overload constructor { fromOptions };
+
     /**
      * Reads a buffer of a specified size from the buffer. If the available buffer is sufficient, the result
      * of the specified size is returned. Otherwise, if Readable has ended, all remaining buffers are returned.
diff --git a/arkts/@arkts.math.Decimal.d.ets b/arkts/@arkts.math.Decimal.d.ets
index d0140f37f4..61fc056bd0 100644
--- a/arkts/@arkts.math.Decimal.d.ets
+++ b/arkts/@arkts.math.Decimal.d.ets
@@ -1481,8 +1481,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toBinary(): string;
 
@@ -1507,8 +1506,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toBinary(significantDigits: double): string;
 
@@ -1535,11 +1533,53 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toBinary(significantDigits: double, rounding: Rounding): string;
 
+  /**
+   * Return a string representing the value of this Decimal in base 2.
+   *
+   * @returns { string } the string type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toBinaryWithNoArg(): string;
+
+  /**
+   * Return a string representing the value of this Decimal in base 2, round to `significantDigits`
+   * significant digits.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toBinaryWithSignificantDigits(significantDigits: double): string;
+
+  /**
+   * Return a string representing the value of this Decimal in base 2, round to `significantDigits`
+   * significant digits using rounding mode `rounding`.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toBinaryWithSignificantDigitsRounding(significantDigits: double, rounding: Rounding): string;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toBinary { toBinaryWithNoArg, toBinaryWithSignificantDigits, toBinaryWithSignificantDigitsRounding };
+
   /**
    * Return a string representing the value of this Decimal in base 8.
    *
@@ -1555,8 +1595,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toOctal(): string;
 
@@ -1579,8 +1618,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toOctal(significantDigits: double): string;
 
@@ -1607,11 +1645,52 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toOctal(significantDigits: double, rounding: Rounding): string;
 
+  /**
+   * Return a string representing the value of this Decimal in base 8.
+   *
+   * @returns { string } the string type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toOctalWithNoArg(): string;
+
+  /**
+   * Return a string representing the value of this Decimal in base 8, round to `significantDigits` significant.
+   *
+   * @param { double } significantDigits {double | string | Decimal}
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toOctalWithSignificantDigits(significantDigits: double): string;
+
+  /**
+   * Return a string representing the value of this Decimal in base 8, round to `significantDigits` significant
+   * digits using rounding mode `rounding`.
+   *
+   * @param { double } significantDigits {double | string | Decimal}
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toOctalWithSignificantDigitsRounding(significantDigits: double, rounding: Rounding): string;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toOctal { toOctalWithNoArg, toOctalWithSignificantDigits, toOctalWithSignificantDigitsRounding };
+
   /**
    * Return a string representing the value of this Decimal in base 16
    *
@@ -1627,8 +1706,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toHexadecimal(): string;
 
@@ -1651,8 +1729,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toHexadecimal(significantDigits: double): string;
 
@@ -1679,11 +1756,52 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toHexadecimal(significantDigits: double, rounding: Rounding): string;
 
+  /**
+   * Return a string representing the value of this Decimal in base 16
+   *
+   * @returns { string } the string type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toHexadecimalWithNoArg(): string;
+
+  /**
+   * Return a string representing the value of this Decimal in base 16, round to `significantDigits` significant.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toHexadecimalWithSignificantDigits(significantDigits: double): string;
+
+  /**
+   * Return a string representing the value of this Decimal in base 16, round to `significantDigits` significant
+   * digits using rounding mode `rounding`.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toHexadecimalWithSignificantDigitsRounding(significantDigits: double, rounding: Rounding): string;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toHexadecimal { toHexadecimalWithNoArg, toHexadecimalWithSignificantDigits, toHexadecimalWithSignificantDigitsRounding };
+
   /**
    * Return a new Decimal whose value is the value of this Decimal.
    *
@@ -1699,8 +1817,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toDecimalPlaces(): Decimal;
 
@@ -1725,8 +1842,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toDecimalPlaces(decimalPlaces: double): Decimal;
 
@@ -1753,11 +1869,53 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toDecimalPlaces(decimalPlaces: double, rounding: Rounding): Decimal;
 
+  /**
+   * Return a new Decimal whose value is the value of this Decimal.
+   *
+   * @returns { Decimal } the Decimal type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toDecimalPlacesWithNoArg(): Decimal;
+
+  /**
+   * Return a new Decimal whose value is the value of this Decimal rounded to a maximum of `decimalPlaces`
+   * decimal places.
+   *
+   * @param { double } decimalPlaces Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @returns { Decimal } the Decimal type
+   * @throws { BusinessError } 10200001 - The value of `decimalPlaces` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toDecimalPlacesWithDecimalPlaces(decimalPlaces: double): Decimal;
+
+  /**
+   * Return a new Decimal whose value is the value of this Decimal rounded to a maximum of `decimalPlaces`
+   * decimal places using rounding mode `rounding`.
+   *
+   * @param { double } decimalPlaces Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { Decimal } the Decimal type
+   * @throws { BusinessError } 10200001 - The value of `decimalPlaces | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toDecimalPlacesWithDecimalPlacesRounding(decimalPlaces: double, rounding: Rounding): Decimal;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toDecimalPlaces { toDecimalPlacesWithNoArg, toDecimalPlacesWithDecimalPlaces, toDecimalPlacesWithDecimalPlacesRounding };
+
   /**
    * Return a string representing the value of this Decimal in exponential notation.
    *
@@ -1773,8 +1931,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toExponential(): string;
 
@@ -1799,8 +1956,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toExponential(decimalPlaces: double): string;
 
@@ -1827,11 +1983,53 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toExponential(decimalPlaces: double, rounding: Rounding): string;
 
+  /**
+   * Return a string representing the value of this Decimal in exponential notation.
+   *
+   * @returns { string } the string type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toExponentialWithNoArg(): string;
+
+  /**
+   * Return a string representing the value of this Decimal in exponential notation rounded to
+   * `decimalPlaces` fixed decimal places.
+   *
+   * @param { double } decimalPlaces Decimal places. Integer, 0 to MAX_DIGITS inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `decimalPlaces` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toExponentialWithDecimalPlaces(decimalPlaces: double): string;
+
+  /**
+   * Return a string representing the value of this Decimal in exponential notation rounded to
+   * `decimalPlaces` fixed decimal places using rounding mode `rounding`.
+   *
+   * @param { double } decimalPlaces Decimal places. Integer, 0 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `decimalPlaces | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toExponentialWithDecimalPlacesRounding(decimalPlaces: double, rounding: Rounding): string;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toExponential { toExponentialWithNoArg, toExponentialWithDecimalPlaces, toExponentialWithDecimalPlacesRounding };
+
   /**
    * Return a string representing the value of this Decimal in normal (fixed-point).
    *
@@ -1847,8 +2045,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toFixed(): string;
 
@@ -1872,23 +2069,60 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
+   */
+  toFixed(decimalPlaces: double): string;
+
+  /**
+   * Return a string representing the value of this Decimal in normal (fixed-point) notation to
+   * `decimalPlaces` fixed decimal places and rounded using rounding mode `rounding`.
+   *
+   * @param { number } decimalPlaces Decimal places. Integer, 0 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `decimalPlaces | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @atomicservice
+   * @since 12
+   */
+  /**
+   * Return a string representing the value of this Decimal in normal (fixed-point) notation to
+   * `decimalPlaces` fixed decimal places and rounded using rounding mode `rounding`.
+   *
+   * @param { double } decimalPlaces Decimal places. Integer, 0 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `decimalPlaces | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @crossplatform
+   * @atomicservice
+   * @since 18
+   */
+  toFixed(decimalPlaces: double, rounding: Rounding): string;
+
+  /**
+   * Return a string representing the value of this Decimal in normal (fixed-point).
+   *
+   * @returns { string } the string type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
    */
-  toFixed(decimalPlaces: double): string;
+  toFixedWithNoArg(): string;
 
   /**
    * Return a string representing the value of this Decimal in normal (fixed-point) notation to
-   * `decimalPlaces` fixed decimal places and rounded using rounding mode `rounding`.
+   * `decimalPlaces` fixed decimal places.
    *
-   * @param { number } decimalPlaces Decimal places. Integer, 0 to MAX_DIGITS inclusive.
-   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @param { double } decimalPlaces Decimal places. Integer, 0 to MAX_DIGITS inclusive.
    * @returns { string } the string type
-   * @throws { BusinessError } 10200001 - The value of `decimalPlaces | rounding` is out of range.
+   * @throws { BusinessError } 10200001 - The value of `decimalPlaces` is out of range.
    * @syscap SystemCapability.Utils.Lang
-   * @atomicservice
-   * @since 12
+   * @since 20
+   * @arkts 1.2
    */
+  toFixedWithDecimalPlaces(decimalPlaces: double): string;
+
   /**
    * Return a string representing the value of this Decimal in normal (fixed-point) notation to
    * `decimalPlaces` fixed decimal places and rounded using rounding mode `rounding`.
@@ -1898,12 +2132,16 @@ declare class Decimal {
    * @returns { string } the string type
    * @throws { BusinessError } 10200001 - The value of `decimalPlaces | rounding` is out of range.
    * @syscap SystemCapability.Utils.Lang
-   * @crossplatform
-   * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 20
+   * @arkts 1.2
    */
-  toFixed(decimalPlaces: double, rounding: Rounding): string;
+  toFixedWithDecimalPlacesRounding(decimalPlaces: double, rounding: Rounding): string;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toFixed { toFixedWithNoArg, toFixedWithDecimalPlaces, toFixedWithDecimalPlacesRounding };
 
   /**
    * Return an array representing the value of this Decimal as a simple fraction with an integer
@@ -1922,8 +2160,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toFraction(): Decimal[];
 
@@ -1954,11 +2191,40 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toFraction(maxDenominator: Value): Decimal[];
 
+  /**
+   * Return an array representing the value of this Decimal as a simple fraction with an integer
+   * numerator and an integer denominator.
+   *
+   * @returns { Decimal[] } the Decimal[] type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toFractionWithNoArg(): Decimal[];
+
+  /**
+   * Return an array representing the value of this Decimal as a simple fraction with an integer
+   * numerator and an integer denominator. The denominator will be a positive non-zero value
+   * less than or equal to `max_denominator`.
+   *
+   * @param { Value } maxDenominator {double | string | Decimal}
+   * @returns { Decimal[] } the Decimal[] type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toFractionWithMaxDenominator(maxDenominator: Value): Decimal[];
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toFraction { toFractionWithNoArg, toFractionWithMaxDenominator };
+
   /**
    * Returns a new Decimal whose value is the nearest multiple of `n`.
    *
@@ -1982,8 +2248,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toNearest(n: Value): Decimal;
 
@@ -2016,11 +2281,41 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toNearest(n: Value, rounding: Rounding): Decimal;
 
+  /**
+   * Returns a new Decimal whose value is the nearest multiple of `n`.
+   *
+   * @param { Value } n {double | string | Decimal}
+   * @returns { Decimal } the Decimal type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toNearestWithN(n: Value): Decimal;
+
+  /**
+   * Returns a new Decimal whose value is the nearest multiple of `n` in the direction of rounding
+   * mode `rounding`, to the value of this Decimal.
+   *
+   * @param { Value } n {double | string | Decimal}
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { Decimal } the Decimal type
+   * @throws { BusinessError } 10200001 - The value of `rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toNearestWithNRounding(n: Value, rounding: Rounding): Decimal;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toNearest { toNearestWithN, toNearestWithNRounding };
+
   /**
    * Return a string representing the value of this Decimal.
    *
@@ -2036,8 +2331,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toPrecision(): string;
 
@@ -2060,8 +2354,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toPrecision(significantDigits: double): string;
 
@@ -2088,11 +2381,52 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toPrecision(significantDigits: double, rounding: Rounding): string;
 
+  /**
+   * Return a string representing the value of this Decimal.
+   *
+   * @returns { string } the string type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toPrecisionWithNoArg(): string;
+
+  /**
+   * Return a string representing the value of this Decimal rounded to `significantDigits` significant digits.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toPrecisionWithSignificantDigits(significantDigits: double): string;
+
+  /**
+   * Return a string representing the value of this Decimal rounded to `significantDigits` significant digits
+   * using rounding mode `rounding`.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { string } the string type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toPrecisionWithSignificantDigitsRounding(significantDigits: double, rounding: Rounding): string;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toPrecision { toPrecisionWithNoArg, toPrecisionWithSignificantDigits, toPrecisionWithSignificantDigitsRounding };
+
   /**
    * Return a new Decimal whose value is the value of this Decimal.
    *
@@ -2108,8 +2442,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toSignificantDigits(): Decimal;
 
@@ -2134,8 +2467,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toSignificantDigits(significantDigits: double): Decimal;
 
@@ -2162,11 +2494,53 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   toSignificantDigits(significantDigits: double, rounding: Rounding): Decimal;
 
+  /**
+   * Return a new Decimal whose value is the value of this Decimal.
+   *
+   * @returns { Decimal } the Decimal type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toSignificantDigitsWithNoArg(): Decimal;
+
+  /**
+   * Return a new Decimal whose value is the value of this Decimal rounded to a maximum of `significantDigits`
+   * significant digits.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @returns { Decimal } the Decimal type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toSignificantDigitsWithSignificantDigits(significantDigits: double): Decimal;
+
+  /**
+   * Return a new Decimal whose value is the value of this Decimal rounded to a maximum of `significantDigits`
+   * significant digits using rounding mode `rounding`.
+   *
+   * @param { double } significantDigits Significant digits. Integer, 1 to MAX_DIGITS inclusive.
+   * @param { Rounding } rounding Rounding mode. Integer, 0 to 8 inclusive.
+   * @returns { Decimal } the Decimal type
+   * @throws { BusinessError } 10200001 - The value of `significantDigits | rounding` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  toSignificantDigitsWithSignificantDigitsRounding(significantDigits: double, rounding: Rounding): Decimal;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload toSignificantDigits { toSignificantDigitsWithNoArg, toSignificantDigitsWithSignificantDigits, toSignificantDigitsWithSignificantDigitsRounding };
+
   /**
    * Return the value of this Decimal converted to a number primitive. Zero keeps its sign.
    *
@@ -2268,8 +2642,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   precision(): double;
 
@@ -2296,11 +2669,40 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   precision(includeZeros: boolean | int): double;
 
+  /**
+   * Return the number of significant digits of the value of this Decimal.
+   *
+   * @returns { double } the number type
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  precisionWithNoArg(): double;
+
+  /**
+   * Return the number of significant digits of the value of this Decimal, whether to count
+   * integer-part trailing zeros.
+   *
+   * @param { boolean | int } includeZeros Whether to count integer-part trailing zeros: true, false,
+   * 1 or 0.
+   * @returns { double } the number type
+   * @throws { BusinessError } 10200001 - The value of `includeZeros` is out of range.
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  precisionWithIncludeZeros(includeZeros: boolean | int): double;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  overload precision { precisionWithNoArg, precisionWithIncludeZeros };
+
   /**
    * Return a new Decimal whose value is the absolute value of `n`.
    *
@@ -3476,8 +3878,7 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   static random(): Decimal;
 
@@ -3510,11 +3911,42 @@ declare class Decimal {
    * @syscap SystemCapability.Utils.Lang
    * @crossplatform
    * @atomicservice
-   * @since arkts {'1.1':'18', '1.2':'20'}
-   * @arkts 1.1&1.2
+   * @since 18
    */
   static random(significantDigits: double): Decimal;
 
+  /**
+   * Returns a new Decimal with a random value equal to or greater than 0 and less than 1.
+   *
+   * @returns { Decimal } the Decimal type
+   * @throws { BusinessError } 10200061 - Crypto unavailable
+   * @static
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  static randomWithNoArg(): Decimal;
+
+  /**
+   * Returns a new Decimal with a random value equal to or greater than 0 and less than 1, and with
+   * `significantDigits` significant digits (or less if trailing zeros are produced).
+   *
+   * @param { double } significantDigits Significant digits. Integer, 0 to MAX_DIGITS inclusive.
+   * @returns { Decimal } the Decimal type
+   * @throws { BusinessError } 10200061 - Crypto unavailable
+   * @static
+   * @syscap SystemCapability.Utils.Lang
+   * @since 20
+   * @arkts 1.2
+   */
+  static randomWithSignificantDigits(significantDigits: double): Decimal;
+
+  /**
+   * @since 20
+   * @arkts 1.2
+   */
+  static overload random { randomWithNoArg, randomWithSignificantDigits };
+
   /**
    * Return the sign of the passed value to the method.
    *   1    if x > 0,
-- 
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