System.Log.Heavy.TH

This module contains TemplateHaskell macros, that can be useful in many applications. In more complex applications, however, you probably will have to write your own adapter macros, which better suits your needs.

Documentation

putMessage :: Level -> Q Exp

TH macro to put message to log. Usage:

$putMessage info_level "Received message #{}" (Single messageId)

Use () as last argument if you do not have variables.

This code will work in any monad that implements HasLogging constraint.

trace :: Q Exp

TH macro to log a message with TRACE level. Usage:

$trace "hello, {}!" (Single name)

debug :: Q Exp

TH macro to log a message with DEBUG level. Usage:

$debug "hello, {}!" (Single name)

info :: Q Exp

TH macro to log a message with INFO level. Usage:

$info "hello, {}!" (Single name)

warning :: Q Exp

TH macro to log a message with WARN level. Usage:

$warning "Beware the {}!" (Single name)

reportError :: Q Exp

TH macro to log a message with ERROR level. Usage:

$reportError "Transaction #{} was declined." (Single transactionId)

fatal :: Q Exp

TH macro to log a message with FATAL level. Usage:

$fatal "Cannot establish database connection" ()

here :: Q Exp

TH macro to obtain current location in haskell source file. Can be useful to construct LogMessage structures 'by hand'.

thisModule :: Q Exp

TH macro to obtain current module name in form of LogSource. Can be useful to construct LogMessage structures 'by hand'.

Orphan instances

Lift Priority

Methods

lift :: Priority -> Q Exp

Lift Level

Methods

lift :: Level -> Q Exp