Struct StructuredLogEntry 

pub struct StructuredLogEntry {
    pub level: LogLevel,
    pub message: String,
    pub timestamp: String,
    pub target: Option<String>,
    pub fields: StructuredFields,
}

带结构化字段与 target 的日志条目。

相比 LogEntry，增加了：

• target：日志来源模块名（用于 LevelFilter 过滤）
• fields：结构化键值对字段

Fields

level: LogLevel

message: String

timestamp: String

target: Option<String>

fields: StructuredFields

Implementations

impl StructuredLogEntry

pub fn new(level: LogLevel, message: impl Into<String>) -> Self

创建结构化日志条目

pub fn with_target(self, target: impl Into<String>) -> Self

设置 target（模块名）

pub fn with_field( self, key: impl Into<String>, value: impl Into<String>, ) -> Self

添加一个结构化字段

pub fn from_log_entry(entry: &LogEntry) -> Self

从普通 LogEntry 转换（target 和 fields 为空）

pub fn to_log_entry(&self) -> LogEntry

转换为普通 LogEntry（丢弃 target 和 fields）

pub fn to_json(&self) -> Result<String, Error>

序列化为 JSON 字符串（便于写入文件或发送到远程）

pub fn from_json(json: &str) -> Result<Self, Error>

从 JSON 字符串反序列化

pub fn format_fields(&self) -> String

将结构化字段格式化为 key=value 列表（用于日志文本输出）

impl StructuredLogEntry

pub fn with_fields(self, fields: StructuredFields) -> Self

批量设置结构化字段

Trait Implementations

impl Clone for StructuredLogEntry

fn clone(&self) -> StructuredLogEntry

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for StructuredLogEntry

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for StructuredLogEntry

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for StructuredLogEntry

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.