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Debug::Trace 0.04

  Date Added: May 26, 2010  |  Visits: 846

Debug::Trace

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Debug::Trace is a Perl extension to trace subroutine calls. SYNOPSIS perl -MDebug::Trace=foo,bar yourprogram.pl Debug::Trace instruments subroutines to provide tracing information upon every call and return. Using Debug::Trace does not require any changes to your sources. Most often, it will be used from the command line: perl -MDebug::Trace=foo,bar yourprogram.pl This will have your subroutines foo() and bar() printing call and return information. Subroutine names may be fully qualified to denote subroutines in other packages than the default main::. By default, the trace information is output using the standard warn() function. MODIFIERS Modifiers can be inserted in the list of subroutines to change the default behavior of this module. All modifiers can be used in three ways: :name to enable a specific feature. :noname to disable a specific feature. :name(value) to set a feature to a specific value. In general, :name is equivalent to :name(1), while :noname corresponds to :name(0). The following modifiers are recognized: :warn Uses warn() to produce the trace output (default). :nowarn Sends trace output directly to STDERR. :caller Add basic call information to the trace message, including from where the routine was called, and by whom. This is enabled by default. :stacktrace Add a stack trace (call history). :maxlen(length) Truncate the length of the lines of trace information to length characters. The following modifiers can be used to control the way Data::Dumper prints the values of parameters and return values. See also Data::Dumper. :indent Controls the style of indentation. It can be set to 0, 1, 2 or 3. Style 0 spews output without any newlines, indentation, or spaces between list items. :indent(0) is the default. :useqq When enabled, uses double quotes for representing string values. Whitespace other than space will be represented as [ntr], "unsafe" characters will be backslashed, and unprintable characters will be output as quoted octal integers. This is the default, use :nouseqq to disable. :maxdepth(depth) Can be set to a positive integer that specifies the depth beyond which which we dont print structure contents. The default is 2, which means one level of array/hashes in argument lists and return values is expanded. If you use :nomaxdepth or :maxdepth(0), nested structures are fully expanded. :quotekeys Controls wether hash keys are always printed quoted. The default is :noquotekeys. sortkeys Controls whether hash keys are dumped in sorted order. The default is :nosortkeys. Modifiers apply only to the subroutines that follow in the list of arguments..

Requirements: No special requirements
Platforms: Linux
Keyword: Debugtrace Default Libraries Modifiers Perl Programming Subroutine Subroutines Trace Will Be
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License: Freeware Size: 5.12 KB
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