Crate id_effect_logger 

Injectable EffectLogger service for the effect system.

Service/Tag pattern

Extract the logger from the environment once with require!(EffectLogger), then call its methods as regular effectful steps:

effect!(|_r: &mut R| {
    let logger = require!(EffectLogger);
    ~logger.warn("something suspicious");
    ~logger.info("all good");
    result
})

The environment R only needs to satisfy R: Get<EffectLogger, Here, Target = EffectLogger>. The caller composes layers at the top of the program. For a minimal stack that only provides EffectLogger, build Context::new(Cons(layer_effect_logger().build().expect(\"…\"), Nil)) or Context::new(Cons(Service::<EffectLogger, _>::new(EffectLogger), Nil)) at the program edge.

Log methods accept impl Into<Cow<'static, str>>: literals stay zero-copy; runtime text passes as String or format!(...).

Structs

CompositeLogBackend

Thread-safe list of backends; also implements LogBackend by fan-out.

EffectLogComposite

Marker capability: composite log backend installed on this thread.

EffectLogMetadata

Marker capability: fiber-local log annotation / span metadata installed.

EffectLogger

Log sink registered as EffectLogger via capability DI; forwards to tracing.

EffectLoggerLive

Default EffectLogger provider (tracing-backed).

JsonLogBackend

One JSON object per line (serde_json), for files or test buffers.

LogContext

Metadata attached to log lines (wall-clock UTC, etc.).

LogMetadataLive

Installs fiber-local annotation and span-stack refs used by crate::annotate_logs and crate::with_log_span.

LogRecord

One log event passed to each backend in a CompositeLogBackend.

StructuredLogBackend

Human-oriented key=value lines (no JSON), still machine-grep-friendly.

TracingLogBackend

Forwards to the tracing crate (same levels as crate::EffectLogger legacy path).

Enums

EffectLoggerError

Errors that a log sink may produce.

LogLevel

Logging level for EffectLogger.

Traits

LogBackend

Sink for LogRecord values (tracing, JSON file, tests, etc.).

Logger

Effect.ts-style composable logger: Self::add, Self::replace, Self::remove.

Functions

annotate_logs

Run inner with key=value merged into the fiber-local annotation map (restored afterward).

provide_composite_logger

Build a provider that registers composite for EffectLogger::log on this thread.

provide_minimum_log_level

Build a provider that allocates a minimum LogLevel FiberRef and registers it for filtering.

with_log_span

Run inner while a span label is pushed on the fiber-local span stack (restored afterward).

Type Aliases

EffectLogMinLevel

Fiber-local minimum log level installed by provide_minimum_log_level.