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Dumpvalue

Section: Perl Programmers Reference Guide (3)
Updated: 2001-09-21
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NAME

Dumpvalue - provides screen dump of Perl data.  

SYNOPSIS

  use Dumpvalue;
  my $dumper = new Dumpvalue;
  $dumper->set(globPrint => 1);
  $dumper->dumpValue(\*::);
  $dumper->dumpvars('main');
  my $dump = $dumper->stringify($some_value);

 

DESCRIPTION

 

Creation

A new dumper is created by a call

  $d = new Dumpvalue(option1 => value1, option2 => value2)

Recognized options:

arrayDepth, hashDepth
Print only first N elements of arrays and hashes. If false, prints all the elements.
compactDump, veryCompact
Change style of array and hash dump. If true, short array may be printed on one line.
globPrint
Whether to print contents of globs.
dumpDBFiles
Dump arrays holding contents of debugged files.
dumpPackages
Dump symbol tables of packages.
dumpReused
Dump contents of ``reused'' addresses.
tick, quoteHighBit, printUndef
Change style of string dump. Default value of "tick" is "auto", one can enable either double-quotish dump, or single-quotish by setting it to """ or "'". By default, characters with high bit set are printed as is. If "quoteHighBit" is set, they will be quoted.
usageOnly
rudimentally per-package memory usage dump. If set, "dumpvars" calculates total size of strings in variables in the package.
unctrl
Changes the style of printout of strings. Possible values are "unctrl" and "quote".
subdump
Whether to try to find the subroutine name given the reference.
bareStringify
Whether to write the non-overloaded form of the stringify-overloaded objects.
quoteHighBit
Whether to print chars with high bit set in binary or ``as is''.
stopDbSignal
Whether to abort printing if debugger signal flag is raised.

Later in the life of the object the methods may be queries with get() method and set() method (which accept multiple arguments).  

Methods

dumpValue
  $dumper->dumpValue($value);
  $dumper->dumpValue([$value1, $value2]);

Prints a dump to the currently selected filehandle.

dumpValues
  $dumper->dumpValues($value1, $value2);

Same as " $dumper-"dumpValue([$value1, $value2]); >.

stringify
  my $dump = $dumper->stringify($value [,$noticks] );

Returns the dump of a single scalar without printing. If the second argument is true, the return value does not contain enclosing ticks. Does not handle data structures.

dumpvars
  $dumper->dumpvars('my_package');
  $dumper->dumpvars('my_package', 'foo', '~bar$', '!......');

The optional arguments are considered as literal strings unless they start with "~" or "!", in which case they are interpreted as regular expressions (possibly negated).

The second example prints entries with names "foo", and also entries with names which ends on "bar", or are shorter than 5 chars.

set_quote
  $d->set_quote('"');

Sets "tick" and "unctrl" options to suitable values for printout with the given quote char. Possible values are "auto", "'" and """.

set_unctrl
  $d->set_unctrl('unctrl');

Sets "unctrl" option with checking for an invalid argument. Possible values are "unctrl" and "quote".

compactDump
  $d->compactDump(1);

Sets "compactDump" option. If the value is 1, sets to a reasonable big number.

veryCompact
  $d->veryCompact(1);

Sets "compactDump" and "veryCompact" options simultaneously.

set
  $d->set(option1 => value1, option2 => value2);

get
  @values = $d->get('option1', 'option2');


 

Index

NAME
SYNOPSIS
DESCRIPTION
Creation
Methods




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