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godot-docs-l10n/classes/zh_CN/class_packedfloat64array.rst

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.. DO NOT EDIT THIS FILE!!!
.. Generated automatically from Godot engine sources.
.. Generator: https://github.com/godotengine/godot/tree/4.4/doc/tools/make_rst.py.
.. XML source: https://github.com/godotengine/godot/tree/4.4/doc/classes/PackedFloat64Array.xml.
.. _class_PackedFloat64Array:
PackedFloat64Array
==================
64 位浮点数紧缩数组。
.. rst-class:: classref-introduction-group
描述
----
专门设计用于保存 64 位浮点值（双精度）的数组。紧密打包数据，因此可为大型数组节省内存。
如果只需要紧密打包 32 位浮点数，请参阅 :ref:`PackedFloat32Array<class_PackedFloat32Array>` 以获得更节省内存的替代方案。
\ **紧缩数组、类型化数组和非类型化数组之间的差异：**\ 与同类型的类型化数组相比，紧缩数组的迭代和修改速度通常更快（例如 **PackedFloat64Array** 与 ``Array[float]``\ ）。此外，紧缩数组消耗的内存更少。缺点是，紧缩数组不太灵活，因为它们不提供许多便捷方法，例如 :ref:`Array.map()<class_Array_method_map>`\ 。类型化数组的迭代和修改速度反过来比非类型化数组更快。
\ **注意：**\ 紧缩数组始终通过引用传递。要获取可以独立于原始数组进行修改的数组副本，请使用 :ref:`duplicate()<class_PackedFloat64Array_method_duplicate>`\ 。内置属性和方法并\ *非*\ 如此。这些返回的紧缩数组是副本，更改它\ *不*\ 会影响原始值。要更新内置属性，需要修改返回的数组，然后再次将其分配给该属性。
.. note::
通过 C# 使用该 API 时会有显著不同，详见 :ref:`doc_c_sharp_differences`\ 。
.. rst-class:: classref-reftable-group
构造函数
--------
.. table::
:widths: auto
+-----------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedFloat64Array<class_PackedFloat64Array>` | :ref:`PackedFloat64Array<class_PackedFloat64Array_constructor_PackedFloat64Array>`\ (\ ) |
+-----------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedFloat64Array<class_PackedFloat64Array>` | :ref:`PackedFloat64Array<class_PackedFloat64Array_constructor_PackedFloat64Array>`\ (\ from\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) |
+-----------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedFloat64Array<class_PackedFloat64Array>` | :ref:`PackedFloat64Array<class_PackedFloat64Array_constructor_PackedFloat64Array>`\ (\ from\: :ref:`Array<class_Array>`\ ) |
+-----------------------------------------------------+------------------------------------------------------------------------------------------------------------------------------------------------------+
.. rst-class:: classref-reftable-group
方法
----
.. table::
:widths: auto
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`append<class_PackedFloat64Array_method_append>`\ (\ value\: :ref:`float<class_float>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`append_array<class_PackedFloat64Array_method_append_array>`\ (\ array\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`bsearch<class_PackedFloat64Array_method_bsearch>`\ (\ value\: :ref:`float<class_float>`, before\: :ref:`bool<class_bool>` = true\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`clear<class_PackedFloat64Array_method_clear>`\ (\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`count<class_PackedFloat64Array_method_count>`\ (\ value\: :ref:`float<class_float>`\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedFloat64Array<class_PackedFloat64Array>` | :ref:`duplicate<class_PackedFloat64Array_method_duplicate>`\ (\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`fill<class_PackedFloat64Array_method_fill>`\ (\ value\: :ref:`float<class_float>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`find<class_PackedFloat64Array_method_find>`\ (\ value\: :ref:`float<class_float>`, from\: :ref:`int<class_int>` = 0\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>` | :ref:`get<class_PackedFloat64Array_method_get>`\ (\ index\: :ref:`int<class_int>`\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`has<class_PackedFloat64Array_method_has>`\ (\ value\: :ref:`float<class_float>`\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`insert<class_PackedFloat64Array_method_insert>`\ (\ at_index\: :ref:`int<class_int>`, value\: :ref:`float<class_float>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`is_empty<class_PackedFloat64Array_method_is_empty>`\ (\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`push_back<class_PackedFloat64Array_method_push_back>`\ (\ value\: :ref:`float<class_float>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`remove_at<class_PackedFloat64Array_method_remove_at>`\ (\ index\: :ref:`int<class_int>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`resize<class_PackedFloat64Array_method_resize>`\ (\ new_size\: :ref:`int<class_int>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`reverse<class_PackedFloat64Array_method_reverse>`\ (\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`rfind<class_PackedFloat64Array_method_rfind>`\ (\ value\: :ref:`float<class_float>`, from\: :ref:`int<class_int>` = -1\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`set<class_PackedFloat64Array_method_set>`\ (\ index\: :ref:`int<class_int>`, value\: :ref:`float<class_float>`\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`int<class_int>` | :ref:`size<class_PackedFloat64Array_method_size>`\ (\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedFloat64Array<class_PackedFloat64Array>` | :ref:`slice<class_PackedFloat64Array_method_slice>`\ (\ begin\: :ref:`int<class_int>`, end\: :ref:`int<class_int>` = 2147483647\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| |void| | :ref:`sort<class_PackedFloat64Array_method_sort>`\ (\ ) |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedByteArray<class_PackedByteArray>` | :ref:`to_byte_array<class_PackedFloat64Array_method_to_byte_array>`\ (\ ) |const| |
+-----------------------------------------------------+--------------------------------------------------------------------------------------------------------------------------------------------+
.. rst-class:: classref-reftable-group
运算符
------
.. table::
:widths: auto
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`operator !=<class_PackedFloat64Array_operator_neq_PackedFloat64Array>`\ (\ right\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`PackedFloat64Array<class_PackedFloat64Array>` | :ref:`operator +<class_PackedFloat64Array_operator_sum_PackedFloat64Array>`\ (\ right\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`bool<class_bool>` | :ref:`operator ==<class_PackedFloat64Array_operator_eq_PackedFloat64Array>`\ (\ right\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+
| :ref:`float<class_float>` | :ref:`operator []<class_PackedFloat64Array_operator_idx_int>`\ (\ index\: :ref:`int<class_int>`\ ) |
+-----------------------------------------------------+-------------------------------------------------------------------------------------------------------------------------------------------------+
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
构造函数说明
------------
.. _class_PackedFloat64Array_constructor_PackedFloat64Array:
.. rst-class:: classref-constructor
:ref:`PackedFloat64Array<class_PackedFloat64Array>` **PackedFloat64Array**\ (\ ) :ref:`🔗<class_PackedFloat64Array_constructor_PackedFloat64Array>`
构造空的 **PackedFloat64Array**\ 。
.. rst-class:: classref-item-separator
----
.. rst-class:: classref-constructor
:ref:`PackedFloat64Array<class_PackedFloat64Array>` **PackedFloat64Array**\ (\ from\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ )
构造给定 **PackedFloat64Array** 的副本。
.. rst-class:: classref-item-separator
----
.. rst-class:: classref-constructor
:ref:`PackedFloat64Array<class_PackedFloat64Array>` **PackedFloat64Array**\ (\ from\: :ref:`Array<class_Array>`\ )
构造新 **PackedFloat64Array**\ 。你还可以传入通用 :ref:`Array<class_Array>` 进行转换。
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
方法说明
--------
.. _class_PackedFloat64Array_method_append:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **append**\ (\ value\: :ref:`float<class_float>`\ ) :ref:`🔗<class_PackedFloat64Array_method_append>`
向数组末尾追加一个元素（\ :ref:`push_back()<class_PackedFloat64Array_method_push_back>` 的别名）。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_append_array:
.. rst-class:: classref-method
|void| **append_array**\ (\ array\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) :ref:`🔗<class_PackedFloat64Array_method_append_array>`
在该数组的末尾追加一个 **PackedFloat64Array**\ 。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_bsearch:
.. rst-class:: classref-method
:ref:`int<class_int>` **bsearch**\ (\ value\: :ref:`float<class_float>`, before\: :ref:`bool<class_bool>` = true\ ) :ref:`🔗<class_PackedFloat64Array_method_bsearch>`
使用二分法查找已有值的索引（如果该值尚未存在于数组中，则为保持排序顺序的插入索引）。传递 ``before`` 说明符是可选的。如果该参数为 ``false``\ ，则返回的索引位于数组中该值的所有已有的条目之后。
\ **注意：**\ 在未排序的数组上调用 :ref:`bsearch()<class_PackedFloat64Array_method_bsearch>` 会产生预料之外的行为。
\ **注意：**\ :ref:`@GDScript.NAN<class_@GDScript_constant_NAN>` 的行为与其他数字不同。因此，如果包含 NaN，则这个方法的结果可能不准确。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_clear:
.. rst-class:: classref-method
|void| **clear**\ (\ ) :ref:`🔗<class_PackedFloat64Array_method_clear>`
清空数组。相当于调用 :ref:`resize()<class_PackedFloat64Array_method_resize>` 时指定大小为 ``0``\ 。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_count:
.. rst-class:: classref-method
:ref:`int<class_int>` **count**\ (\ value\: :ref:`float<class_float>`\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_count>`
返回数组中某个元素的出现次数。
\ **注意：**\ :ref:`@GDScript.NAN<class_@GDScript_constant_NAN>` 的行为与其他数字不同。因此，如果包含 NaN，则这个方法的结果可能不准确。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_duplicate:
.. rst-class:: classref-method
:ref:`PackedFloat64Array<class_PackedFloat64Array>` **duplicate**\ (\ ) :ref:`🔗<class_PackedFloat64Array_method_duplicate>`
创建该数组的副本，并将该副本返回。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_fill:
.. rst-class:: classref-method
|void| **fill**\ (\ value\: :ref:`float<class_float>`\ ) :ref:`🔗<class_PackedFloat64Array_method_fill>`
将数组中的所有元素都设为给定的值。通常与 :ref:`resize()<class_PackedFloat64Array_method_resize>` 一起使用，创建给定大小的数组并初始化元素。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_find:
.. rst-class:: classref-method
:ref:`int<class_int>` **find**\ (\ value\: :ref:`float<class_float>`, from\: :ref:`int<class_int>` = 0\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_find>`
在数组中搜索值并返回其索引，如果未找到则返回 ``-1`` 。可选地，可以传递起始搜索索引。
\ **注意：**\ :ref:`@GDScript.NAN<class_@GDScript_constant_NAN>` 的行为与其他数字不同。因此，如果包含 NaN，则这个方法的结果可能不准确。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_get:
.. rst-class:: classref-method
:ref:`float<class_float>` **get**\ (\ index\: :ref:`int<class_int>`\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_get>`
返回数组中位于给定索引 ``index`` 处的 64 位浮点数。与使用 ``[]`` 运算符相同（\ ``array[index]``\ ）。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_has:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **has**\ (\ value\: :ref:`float<class_float>`\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_has>`
如果数组中包含 ``value``\ ，则返回 ``true``\ 。
\ **注意：**\ :ref:`@GDScript.NAN<class_@GDScript_constant_NAN>` 的行为与其他数字不同。因此，如果包含 NaN，则这个方法的结果可能不准确。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_insert:
.. rst-class:: classref-method
:ref:`int<class_int>` **insert**\ (\ at_index\: :ref:`int<class_int>`, value\: :ref:`float<class_float>`\ ) :ref:`🔗<class_PackedFloat64Array_method_insert>`
在数组中给定的位置插入一个新元素。这个位置必须是有效的，或者是在数组的末端（\ ``idx == size()``\ ）。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_is_empty:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **is_empty**\ (\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_is_empty>`
该数组为空时，返回 ``true``\ 。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_push_back:
.. rst-class:: classref-method
:ref:`bool<class_bool>` **push_back**\ (\ value\: :ref:`float<class_float>`\ ) :ref:`🔗<class_PackedFloat64Array_method_push_back>`
在数组的末尾追加一个元素。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_remove_at:
.. rst-class:: classref-method
|void| **remove_at**\ (\ index\: :ref:`int<class_int>`\ ) :ref:`🔗<class_PackedFloat64Array_method_remove_at>`
从数组中删除位于索引的元素。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_resize:
.. rst-class:: classref-method
:ref:`int<class_int>` **resize**\ (\ new_size\: :ref:`int<class_int>`\ ) :ref:`🔗<class_PackedFloat64Array_method_resize>`
设置数组的大小。如果数组被增大，则保留数组末端的元素。如果数组被缩小，则将数组截断到新的大小。调用一次 :ref:`resize()<class_PackedFloat64Array_method_resize>` 并分配新值比逐个添加新元素要快。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_reverse:
.. rst-class:: classref-method
|void| **reverse**\ (\ ) :ref:`🔗<class_PackedFloat64Array_method_reverse>`
将数组中的元素逆序排列。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_rfind:
.. rst-class:: classref-method
:ref:`int<class_int>` **rfind**\ (\ value\: :ref:`float<class_float>`, from\: :ref:`int<class_int>` = -1\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_rfind>`
逆序搜索数组。还可以传递起始搜索位置索引。如果为负，则起始索引被视为相对于数组的结尾。
\ **注意：**\ :ref:`@GDScript.NAN<class_@GDScript_constant_NAN>` 的行为与其他数字不同。因此，如果包含 NaN，则这个方法的结果可能不准确。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_set:
.. rst-class:: classref-method
|void| **set**\ (\ index\: :ref:`int<class_int>`, value\: :ref:`float<class_float>`\ ) :ref:`🔗<class_PackedFloat64Array_method_set>`
更改给定索引处的浮点数。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_size:
.. rst-class:: classref-method
:ref:`int<class_int>` **size**\ (\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_size>`
返回数组中元素的个数。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_slice:
.. rst-class:: classref-method
:ref:`PackedFloat64Array<class_PackedFloat64Array>` **slice**\ (\ begin\: :ref:`int<class_int>`, end\: :ref:`int<class_int>` = 2147483647\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_slice>`
返回该 **PackedFloat64Array** 的切片，是从 ``begin``\ （含）到 ``end``\ （不含）的全新 **PackedFloat64Array**\ 。
\ ``begin`` 和 ``end`` 的绝对值会按数组大小进行限制，所以 ``end`` 的默认值会切到数组大小为止（即 ``arr.slice(1)`` 是 ``arr.slice(1, arr.size())`` 的简写）。
如果 ``begin`` 或 ``end`` 为负，则表示相对于数组的末尾（即 ``arr.slice(0, -2)`` 是 ``arr.slice(0, arr.size() - 2)`` 的简写）。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_sort:
.. rst-class:: classref-method
|void| **sort**\ (\ ) :ref:`🔗<class_PackedFloat64Array_method_sort>`
升序排列数组中的元素。
\ **注意：**\ :ref:`@GDScript.NAN<class_@GDScript_constant_NAN>` 的行为与其他数字不同。因此，如果包含 NaN，则这个方法的结果可能不准确。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_method_to_byte_array:
.. rst-class:: classref-method
:ref:`PackedByteArray<class_PackedByteArray>` **to_byte_array**\ (\ ) |const| :ref:`🔗<class_PackedFloat64Array_method_to_byte_array>`
返回数据的副本，将其中的每个元素都编码为 8 个字节，放入 :ref:`PackedByteArray<class_PackedByteArray>` 中。
新数组的大小为 ``float64_array.size() * 8``\ 。
.. rst-class:: classref-section-separator
----
.. rst-class:: classref-descriptions-group
运算符说明
----------
.. _class_PackedFloat64Array_operator_neq_PackedFloat64Array:
.. rst-class:: classref-operator
:ref:`bool<class_bool>` **operator !=**\ (\ right\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) :ref:`🔗<class_PackedFloat64Array_operator_neq_PackedFloat64Array>`
如果数组内容不同，则返回 ``true``\ 。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_operator_sum_PackedFloat64Array:
.. rst-class:: classref-operator
:ref:`PackedFloat64Array<class_PackedFloat64Array>` **operator +**\ (\ right\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) :ref:`🔗<class_PackedFloat64Array_operator_sum_PackedFloat64Array>`
返回新的 **PackedFloat64Array**\ ，新数组的内容为此数组在末尾加上 ``right``\ 。为了提高性能，请考虑改用 :ref:`append_array()<class_PackedFloat64Array_method_append_array>`\ 。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_operator_eq_PackedFloat64Array:
.. rst-class:: classref-operator
:ref:`bool<class_bool>` **operator ==**\ (\ right\: :ref:`PackedFloat64Array<class_PackedFloat64Array>`\ ) :ref:`🔗<class_PackedFloat64Array_operator_eq_PackedFloat64Array>`
如果两个数组的内容相同，即对应索引号的双精度浮点数相等，则返回 ``true``\ 。
.. rst-class:: classref-item-separator
----
.. _class_PackedFloat64Array_operator_idx_int:
.. rst-class:: classref-operator
:ref:`float<class_float>` **operator []**\ (\ index\: :ref:`int<class_int>`\ ) :ref:`🔗<class_PackedFloat64Array_operator_idx_int>`
返回索引 ``index`` 处的 :ref:`float<class_float>`\ 。负数索引可以从末尾开始访问元素。使用超出数组范围的索引会导致出错。
.. |virtual| replace:: :abbr:`virtual (本方法通常需要用户覆盖才能生效。)`
.. |const| replace:: :abbr:`const (本方法无副作用，不会修改该实例的任何成员变量。)`
.. |vararg| replace:: :abbr:`vararg (本方法除了能接受在此处描述的参数外，还能够继续接受任意数量的参数。)`
.. |constructor| replace:: :abbr:`constructor (本方法用于构造某个类型。)`
.. |static| replace:: :abbr:`static (调用本方法无需实例，可直接使用类名进行调用。)`
.. |operator| replace:: :abbr:`operator (本方法描述的是使用本类型作为左操作数的有效运算符。)`
.. |bitfield| replace:: :abbr:`BitField (这个值是由下列位标志构成位掩码的整数。)`
.. |void| replace:: :abbr:`void (无返回值。)`
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