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Parsing of the “doc/qbk/07_concepts/File_zh_Hans.qbk” file was enforced. 06/26/2026
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`std::size_t`
`std::size_t`
34
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`std::uint64_t`
`std::uint64_t`
34
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Semantics, Pre/Post-conditions
语义，前置/后置条件
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06/26/2026
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Parsing of the “doc/qbk/07_concepts/File.qbk” file was enforced. 06/26/2026
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Changes committed 06/26/2026
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Changes committed
Changes committed 06/26/2026
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Translation completed
Translation completed 06/19/2026
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* [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`]
06/19/2026
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Models
Models模型
06/19/2026
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Exemplar
Exemplar示例
06/19/2026
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Exemplar
Exemplar
06/19/2026
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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.
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` to设置为 `errc::invalid_argument` and return immediately. The function will ensure that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` is为 `true` if there was no error or set to the appropriate error code if an error occurred.；若发生错误，则将其设置为相应的错误代码。
06/19/2026
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Translation changed
`f.write(c,n,ec)`
`f.write(c,n,ec)`
06/19/2026
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Attempts to read `n` bytes starting at the current file offset from the open file referred to by `f`. Bytes read are stored in the memory buffer at address `b` which must be at least `n` bytes in size. The function advances the file offset by the amount read, and returns the number of bytes actually read, 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. If an end-of-file condition is detected prior to reading any bytes, the function will ensure that `!ec` is `true` and the return value shall be 0.
Attempts to read `n` bytes starting at the current file offset from the open file referred to by `f`. Bytes read are stored in the memory buffer at address `b` which must be at least `n` bytes in size. The function advances the file offset by the amount read, and returns the number of bytes actually read, which may be less than `n`. If `f` does not refer to an open file, the function will set该函数尝试从 `f` 引用的打开文件中，自当前文件偏移量处读取 `n` 个字节。读取的字节将存储到地址 `b` 处的内存缓冲区中，该缓冲区的大小必须至少为 `n` 个字节。该函数会将文件偏移量推进已读取的字节数，并返回实际读取的字节数，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` to设置为 `errc::invalid_argument` and return immediately. The function will ensure that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` is为 `true` if there was no error or set to the appropriate error code if an error occurred. If an end-of-file condition is detected prior to reading any bytes, the function will ensure that；若发生错误，则将其设置为相应的错误代码。若在读取任何字节之前检测到文件结束条件，该函数将确保 `!ec` is为 `true` and the return value shall be 0.，且返回值为 0。
06/19/2026
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Translation added
`std::size_t`
`std::size_t`
34
06/19/2026
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Translation changed
`f.read(b,n,ec)`
`f.read(b,n,ec)`
06/19/2026
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Attempts to reposition the current file offset to the value `o`, which represents a byte offset relative to the beginning of the file. 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.
Attempts to reposition the current file offset to the value `o`, which represents a byte offset relative to the beginning of the file. If `f` does not refer to an open file, the function will set该函数尝试将当前文件偏移量重新定位到 `o`，该值表示相对于文件起始位置的字节偏移量。若 `f` 未引用一个打开的文件，该函数会将 `ec` to设置为 `errc::invalid_argument` and return immediately. The function will ensure that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` is为 `true` if there was no error or set to the appropriate error code if an error occurred.；若发生错误，则将其设置为相应的错误代码。
06/19/2026
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Translation changed
`f.seek(o,ec)`
`f.seek(o,ec)`
06/19/2026
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Translation changed
If `f` refers to an open file, this function attempts to determine the current file offset and return it. If `f` does not refer to an open file, the function will set `ec` to `errc::invalid_argument` and return 0. The function will ensure that `!ec` is `true` if there was no error or set to the appropriate error code if an error occurred.
If若 `f` refers to an open file, this function attempts to determine the current file offset and return it. If `f` does not refer to an open file, the function will set引用一个打开的文件，该函数将尝试获取并返回当前文件偏移量。若 `f` 未引用一个打开的文件，该函数会将 `ec` to设置为 `errc::invalid_argument` and return 0. The function will ensure that并返回 0。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` is为 `true` if there was no error or set to the appropriate error code if an error occurred.；若发生错误，则将其设置为相应的错误代码。
06/19/2026

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