| Copyright | Copyright (C) 2010 Uwe Schmidt |
|---|---|
| License | MIT |
| Maintainer | Uwe Schmidt (uwe@fh-wedel.de) |
| Stability | stable |
| Portability | portable |
| Safe Haskell | None |
| Language | Haskell98 |
Text.XML.HXT.Arrow.XmlState.TraceHandling
Description
the trace arrows
- setTraceLevel :: Int -> IOStateArrow s b b
- getTraceLevel :: IOStateArrow s b Int
- setTraceCmd :: (Int -> String -> IO ()) -> IOStateArrow s b b
- getTraceCmd :: IOStateArrow a b (Int -> String -> IO ())
- withTraceLevel :: Int -> IOStateArrow s b c -> IOStateArrow s b c
- trace :: Int -> IOStateArrow s b String -> IOStateArrow s b b
- traceValue :: Int -> (b -> String) -> IOStateArrow s b b
- traceString :: Int -> (b -> String) -> IOStateArrow s b b
- traceMsg :: Int -> String -> IOStateArrow s b b
- traceSource :: IOStateArrow s XmlTree XmlTree
- traceTree :: IOStateArrow s XmlTree XmlTree
- traceDoc :: String -> IOStateArrow s XmlTree XmlTree
- traceOutputToStderr :: Int -> String -> IO ()
Documentation
setTraceLevel :: Int -> IOStateArrow s b b Source
set the global trace level
getTraceLevel :: IOStateArrow s b Int Source
read the global trace level
setTraceCmd :: (Int -> String -> IO ()) -> IOStateArrow s b b Source
set the global trace command. This command does the trace output
getTraceCmd :: IOStateArrow a b (Int -> String -> IO ()) Source
acces the command for trace output
withTraceLevel :: Int -> IOStateArrow s b c -> IOStateArrow s b c Source
run an arrow with a given trace level, the old trace level is restored after the arrow execution
trace :: Int -> IOStateArrow s b String -> IOStateArrow s b b Source
apply a trace arrow and issue message to stderr
traceValue :: Int -> (b -> String) -> IOStateArrow s b b Source
trace the current value transfered in a sequence of arrows.
The value is formated by a string conversion function. This is a substitute for the old and less general traceString function
traceString :: Int -> (b -> String) -> IOStateArrow s b b Source
an old alias for traceValue
traceMsg :: Int -> String -> IOStateArrow s b b Source
issue a string message as trace
traceSource :: IOStateArrow s XmlTree XmlTree Source
issue the source representation of a document if trace level >= 3
for better readability the source is formated with indentDoc
traceTree :: IOStateArrow s XmlTree XmlTree Source
issue the tree representation of a document if trace level >= 4
traceDoc :: String -> IOStateArrow s XmlTree XmlTree Source
trace a main computation step issue a message when trace level >= 1, issue document source if level >= 3, issue tree when level is >= 4
traceOutputToStderr :: Int -> String -> IO () Source