# Functions

NewFileWriter 实例化FileWriter, 支持大文件分割.
WithCap set cap.
WithDaysToKeep 设置文件保留天数.
WithPath 设置文件路径.
WithSuffix 设置文件扩展名.

# Constants

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# Structs

FileWriter 文件写入结构体.
Options 可配置参数.

# Type aliases

Option set options.