Zen

Translation

type: list
* `m` is an instance of [link beast.ref.boost__beast__file_mode `file_mode`]
* `n` is a number of bytes, convertible to `std::size_t`
* `o` is a byte offset in the file, convertible to `std::uint64_t`
* `b` is any non-const pointer to memory
* `c` is any possibly-const pointer to memory
* `ec` is a reference of type [link beast.ref.boost__beast__error_code `error_code`]
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Key English Chinese (Simplified Han script) Actions
File
文件
The [*File] concept abstracts access to files in the underlying file system. To support other platform interfaces, users may author their own [*File] types which meet these requirements.
[*File] 概念抽象了对底层文件系统中文件的访问。为了支持其他平台接口，用户可以编写满足这些要求的自有 [*File] 类型。
Associated Types
关联类型
* [link beast.ref.boost__beast__file_mode `file_mode`]
* [link beast.ref.boost__beast__is_file `is_file`]
* [link beast.ref.boost__beast__file_mode `file_mode`]
* [link beast.ref.boost__beast__is_file `is_file`]
Requirements
要求
In this table:
在下表中：
* `F` is a [*File] type
* `f` is an instance of `F`
* `p` is a value of type `char const*` which points to a null
* `F` 是一个 [*File] 类型。
* `f` 是 `F` 的一个实例。
* `p` 是一个 `char const*` 类型的值，指向一个空字符（null）
* `m` is an instance of [link beast.ref.boost__beast__file_mode `file_mode`]
* `n` is a number of bytes, convertible to `std::size_t`
* `o` is a byte offset in the file, convertible to `std::uint64_t`
* `b` is any non-const pointer to memory
* `c` is any possibly-const pointer to memory
* `ec` is a reference of type [link beast.ref.boost__beast__error_code `error_code`]
* `m` 是一个 [link beast.ref.boost__beast__file_mode `file_mode`] 的实例。
* `n` 是字节数，可转换为 `std::size_t` 类型。
* `o` 是文件中的字节偏移量，可转换为 `std::uint64_t` 类型。
* `b` 是指向内存的任意非常量指针。
* `c` 是指向内存的任意可能为常量的指针。
* `ec` 是一个 [link beast.ref.boost__beast__error_code `error_code`] 类型的引用。
Valid expressions
有效表达式
Expression
表达式
Type
类型
34
Semantics, Pre/Post-conditions
 
Operation
操作
Return Type
返回类型
`F()`
`F()`
Default constructable
默认构造（Default constructible）
`f.~F()`
`f.~F()`
Destructible. If `f` refers to an open file, it is first closed as if by a call to `close` with the error ignored.
可析构。若 `f` 引用一个打开的文件，则先将其关闭，其行为等同于调用 `close`，且忽略可能产生的错误。
`f.is_open()`
`f.is_open()`
`bool`
`bool`
Returns `true` if `f` refers to an open file, `false` otherwise.
若 `f` 引用一个打开的文件，则返回 `true`，否则返回 `false`。
`f.close(ec)`
`f.close(ec)`
If `f` refers to an open file, this function attempts to close the file. Regardless of whether an error occurs or not, a subsequent call to `f.is_open()` will return `false`. The function will ensure that `!ec` is `true` if there was no error or set to the appropriate error code if an error occurred.
若 `f` 引用一个打开的文件，此函数将尝试将其关闭。无论关闭过程中是否发生错误，后续对 `f.is_open()` 的调用均会返回 `false`。同时，该函数会根据实际执行情况设置错误代码：若未发生错误，则确保 `!ec` 为 `true`；若发生错误，则将其设置为相应的错误代码。
English Chinese (Simplified Han script) Actions
`f.open(p,m,ec)`
`f.open(p,m,ec)`
`f.size(ec)`
`f.size(ec)`
`f.seek(o,ec)`
`f.seek(o,ec)`
Valid expressions
有效表达式
Return Type
返回类型
`F()`
`F()`
`f.close(ec)`
`f.close(ec)`
`f.pos(ec)`
`f.pos(ec)`
* `m` is an instance of [link beast.ref.boost__beast__file_mode `file_mode`]
* `n` is a number of bytes, convertible to `std::size_t`
* `o` is a byte offset in the file, convertible to `std::uint64_t`
* `b` is any non-const pointer to memory
* `c` is any possibly-const pointer to memory
* `ec` is a reference of type [link beast.ref.boost__beast__error_code `error_code`]
* `m` 是一个 [link beast.ref.boost__beast__file_mode `file_mode`] 的实例。
* `n` 是字节数，可转换为 `std::size_t` 类型。
* `o` 是文件中的字节偏移量，可转换为 `std::uint64_t` 类型。
* `b` 是指向内存的任意非常量指针。
* `c` 是指向内存的任意可能为常量的指针。
* `ec` 是一个 [link beast.ref.boost__beast__error_code `error_code`] 类型的引用。
Attempts to write `n` bytes from the buffer pointed to by `c` to the current file offset of the open file referred to by `f`. The memory buffer at `c` must point to storage of at least `n` bytes meant to be copied to the file. The function advances the file offset by the amount written, and returns the number of bytes actually written, which may be less than `n`. If `f` does not refer to an open file, the function will set `ec` to `errc::invalid_argument` and return immediately. The function will ensure that `!ec` is `true` if there was no error or set to the appropriate error code if an error occurred.
该函数尝试将 `c` 指向的缓冲区中的 `n` 个字节写入 `f` 引用的打开文件的当前文件偏移量处。`c` 处的内存缓冲区必须指向大小至少为 `n` 个字节的存储，用于复制到文件。该函数会将文件偏移量推进已写入的字节数，并返回实际写入的字节数，该值可能小于 `n`。若 `f` 未引用一个打开的文件，该函数会将 `ec` 设置为 `errc::invalid_argument` 并立即返回。同时，该函数会根据实际执行情况设置错误代码：若未发生错误，则确保 `!ec` 为 `true`；若发生错误，则将其设置为相应的错误代码。
Type
类型
* [link beast.ref.boost__beast__file_mode `file_mode`]
* [link beast.ref.boost__beast__is_file `is_file`]
* [link beast.ref.boost__beast__file_mode `file_mode`]
* [link beast.ref.boost__beast__is_file `is_file`]
Operation
操作
Default constructable
默认构造（Default constructible）
Destructible. If `f` refers to an open file, it is first closed as if by a call to `close` with the error ignored.
可析构。若 `f` 引用一个打开的文件，则先将其关闭，其行为等同于调用 `close`，且忽略可能产生的错误。
Expression
表达式
Associated Types
关联类型
The [*File] concept abstracts access to files in the underlying file system. To support other platform interfaces, users may author their own [*File] types which meet these requirements.
[*File] 概念抽象了对底层文件系统中文件的访问。为了支持其他平台接口，用户可以编写满足这些要求的自有 [*File] 类型。
Requirements
要求
In this table:
在下表中：
* `F` is a [*File] type
* `f` is an instance of `F`
* `p` is a value of type `char const*` which points to a null
* `F` 是一个 [*File] 类型。
* `f` 是 `F` 的一个实例。
* `p` 是一个 `char const*` 类型的值，指向一个空字符（null）
`f.~F()`
`f.~F()`
`f.is_open()`
`f.is_open()`
* [link beast.ref.boost__beast__file_posix `file_posix`]
* [link beast.ref.boost__beast__file_stdio `file_stdio`]
* [link beast.ref.boost__beast__file_win32 `file_win32`]
* [link beast.ref.boost__beast__file_posix `file_posix`]
* [link beast.ref.boost__beast__file_stdio `file_stdio`]
* [link beast.ref.boost__beast__file_win32 `file_win32`]
File
文件
Models
模型

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User avatar Bstran

Translation changed
* `m` is an instance of [link beast.ref.boost__beast__file_mode `file_mode`]
* `n` is a number of bytes, convertible to `std::size_t`
* `o` is a byte offset in the file, convertible to `std::uint64_t`
* `b` is any non-const pointer to memory
* `c` is any possibly-const pointer to memory
* `ec` is a reference of type [link beast.ref.boost__beast__error_code `error_code`]
* `m` is an instance of是一个 [link beast.ref.boost__beast__file_mode `file_mode`] 的实例。
* `n` is a number of bytes, convertible to是字节数，可转换为 `std::size_t` 类型。
* `o` is a byte offset in the file, convertible to是文件中的字节偏移量，可转换为 `std::uint64_t` 类型。
* `b` is any non-const pointer to memory
* `c` is any possibly-const pointer to memory
* `ec` is a reference of type是指向内存的任意非常量指针。
* `c` 是指向内存的任意可能为常量的指针。
* `ec` 是一个 [link beast.ref.boost__beast__error_code `error_code`] 类型的引用。
06/18/2026
User avatar admin

String added in the repository
* `m` is an instance of [link beast.ref.boost__beast__file_mode `file_mode`]
* `n` is a number of bytes, convertible to `std::size_t`
* `o` is a byte offset in the file, convertible to `std::uint64_t`
* `b` is any non-const pointer to memory
* `c` is any possibly-const pointer to memory
* `ec` is a reference of type [link beast.ref.boost__beast__error_code `error_code`]
* `m` is an instance of [link beast.ref.boost__beast__file_mode `file_mode`]
* `n` is a number of bytes, convertible to `std::size_t`
* `o` is a byte offset in the file, convertible to `std::uint64_t`
* `b` is any non-const pointer to memory
* `c` is any possibly-const pointer to memory
* `ec` is a reference of type [link beast.ref.boost__beast__error_code `error_code`]
06/05/2026
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English Chinese (Simplified Han script)
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String information

Source string description
type: list
Unit identifier
58583
Source string location
string ID 27
String age
06/05/2026
Last updated
06/26/2026
Source string age
06/05/2026
Translation file QuickBook file
doc/qbk/07_concepts/File_zh_Hans.qbk, string 8