Haskell Core Libraries (base package)ParentContentsIndex
Debug.Trace
Portability portable
Stability provisional
Maintainer libraries@haskell.org
Contents
Tracing
Description
The trace function.
Synopsis
trace :: String -> a -> a
Tracing
trace :: String -> a -> a
When called, trace prints the string in its first argument to standard error, before returning the second argument as its result. The trace function is not referentially transparent, and should only be used for debugging, or for monitoring execution. Some implementations of trace may decorate the string that's output to indicate that you're tracing.
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