Control.Monad.Logger.CallStack

Converting LogStr to ByteString.

dummy location, used with logWithoutLoc

A default implementation of monadLoggerLog that accepts a file handle as the first argument.

This is used in the definition of runStdoutLoggingT:

runStdoutLoggingT :: MonadIO m => LoggingT m a -> m a
runStdoutLoggingT action =
    runLoggingT action (defaultOutput stdout)

Run a block using a MonadLogger instance. Return logs in a list | @since 0.3.28

Only log messages passing the given predicate function.

This can be a convenient way, for example, to ignore debug level messages.

Lift a location into an Exp.

Logs a message with location given by CallStack. See CallStack for more convenient functions for CallStack based logging.

Generates a function that takes a LogSource and Text and logs a LevelDebug message. Usage:

$logDebugS "SomeSource" "This is a debug log message"

See logDebugCS

See logDebugS

See logDebugCS

See logDebugS

See logDebugCS

Generates a function that takes a LogSource, a level name and a Text and logs a LevelOther message. Usage:

$logOtherS "SomeSource" "My new level" "This is a log message"

See logDebugCS

See logDebugS

Map the unwrapped computation using the given function.

Map the unwrapped computation using the given function.

Run a block using a MonadLogger instance which writes tuples to an unbounded channel.

The tuples can be extracted (ie. in another thread) with unChanLoggingT or a custom extraction funtion, and written to a destination.

Run a block using a MonadLogger instance which appends to the specified file.

Run a block using a MonadLogger instance which prints to stderr.

Run a block using a MonadLogger instance which prints to stdout.

Run a block using a MonadLogger instance. Return a value and logs in a list | @since 0.3.28

Read logging tuples from an unbounded channel and log them into a MonadLoggerIO monad, forever.

For use in a dedicated thread with a channel fed by runChanLoggingT.

Within the LoggingT monad, capture all log messages to a bounded channel of the indicated size, and only actually log them if there is an exception.

Log message builder. Use (<>) to append two LogStr in O(1).

Types that can be converted to a LogStr. Instances for types from the text library use a UTF-8 encoding. Instances for numerical types use a decimal encoding.

A location within a source file.

Monad transformer that adds a new logging function.

A Monad which has the ability to log messages in some manner.

An extension of MonadLogger for the common case where the logging action is a simple IO action. The advantage of using this typeclass is that the logging function itself can be extracted as a first-class value, which can make it easier to manipulate monad transformer stacks, as an example.

Monad transformer that disables logging.

Logs a message with the location provided by an implicit CallStack.

See logDebug

See logDebug

See logDebug

See logDebug

Logs a showable value with the location provided by an implicit CallStack.

See logDebugSH

See logDebugSH

See logDebugSH

See logDebugSH