package Carp;
-our $VERSION = '1.04';
+our $VERSION = '1.05';
+# this file is an utra-lightweight stub. The first time a function is
+# called, Carp::Heavy is loaded, and the real short/longmessmess_jmp
+# subs are installed
+
+our $MaxEvalLen = 0;
+our $Verbose = 0;
+our $CarpLevel = 0;
+our $MaxArgLen = 64; # How much of each argument to print. 0 = all.
+our $MaxArgNums = 8; # How many arguments to print. 0 = all.
+
+require Exporter;
+our @ISA = ('Exporter');
+our @EXPORT = qw(confess croak carp);
+our @EXPORT_OK = qw(cluck verbose longmess shortmess);
+our @EXPORT_FAIL = qw(verbose); # hook to enable verbose mode
+
+# if the caller specifies verbose usage ("perl -MCarp=verbose script.pl")
+# then the following method will be called by the Exporter which knows
+# to do this thanks to @EXPORT_FAIL, above. $_[1] will contain the word
+# 'verbose'.
+
+sub export_fail { shift; $Verbose = shift if $_[0] eq 'verbose'; @_ }
+
+# fixed hooks for stashes to point to
+sub longmess { goto &longmess_jmp }
+sub shortmess { goto &shortmess_jmp }
+# these two are replaced when Carp::Heavy is loaded
+sub longmess_jmp {
+ local($@, $!);
+ eval { require Carp::Heavy };
+ return $@ if $@;
+ goto &longmess_jmp;
+}
+sub shortmess_jmp {
+ local($@, $!);
+ eval { require Carp::Heavy };
+ return $@ if $@;
+ goto &shortmess_jmp;
+}
+
+sub croak { die shortmess @_ }
+sub confess { die longmess @_ }
+sub carp { warn shortmess @_ }
+sub cluck { warn longmess @_ }
+
+1;
+__END__
=head1 NAME
Alternately, you can set the global variable C<$Carp::Verbose> to true.
See the C<GLOBAL VARIABLES> section below.
-=cut
-
-# This package is heavily used. Be small. Be fast. Be good.
-
-# Comments added by Andy Wardley <abw@kfs.org> 09-Apr-98, based on an
-# _almost_ complete understanding of the package. Corrections and
-# comments are welcome.
-
-# The members of %Internal are packages that are internal to perl.
-# Carp will not report errors from within these packages if it
-# can. The members of %CarpInternal are internal to Perl's warning
-# system. Carp will not report errors from within these packages
-# either, and will not report calls *to* these packages for carp and
-# croak. They replace $CarpLevel, which is deprecated. The
-# $Max(EvalLen|(Arg(Len|Nums)) variables are used to specify how the eval
-# text and function arguments should be formatted when printed.
-
-# Comments added by Jos I. Boumans <kane@dwim.org> 11-Aug-2004
-# I can not get %CarpInternal or %Internal to work as advertised,
-# therefor leaving it out of the below documentation.
-# $CarpLevel may be decprecated according to the last comment, but
-# after 6 years, it's still around and in heavy use ;)
-
-=pod
-
=head1 GLOBAL VARIABLES
=head2 $Carp::CarpLevel
Defaults to C<0>.
-=cut
-
-# disable these by default, so they can live w/o require Carp
-$CarpInternal{Carp}++;
-$CarpInternal{warnings}++;
-$Internal{Exporter}++;
-$Internal{'Exporter::Heavy'}++;
-$CarpLevel = 0; # How many extra package levels to skip on carp.
- # How many calls to skip on confess.
- # Reconciling these notions is hard, use
- # %Internal and %CarpInternal instead.
-$MaxEvalLen = 0; # How much eval '...text...' to show. 0 = all.
-$MaxArgLen = 64; # How much of each argument to print. 0 = all.
-$MaxArgNums = 8; # How many arguments to print. 0 = all.
-$Verbose = 0; # If true then make shortmess call longmess instead
-
-require Exporter;
-@ISA = ('Exporter');
-@EXPORT = qw(confess croak carp);
-@EXPORT_OK = qw(cluck verbose longmess shortmess);
-@EXPORT_FAIL = qw(verbose); # hook to enable verbose mode
-
=head1 BUGS
The Carp routines don't handle exception objects currently.
If called with a first argument that is a reference, they simply
call die() or warn(), as appropriate.
-=cut
-
-# if the caller specifies verbose usage ("perl -MCarp=verbose script.pl")
-# then the following method will be called by the Exporter which knows
-# to do this thanks to @EXPORT_FAIL, above. $_[1] will contain the word
-# 'verbose'.
-
-sub export_fail {
- shift;
- $Verbose = shift if $_[0] eq 'verbose';
- return @_;
-}
-
-
-# longmess() crawls all the way up the stack reporting on all the function
-# calls made. The error string, $error, is originally constructed from the
-# arguments passed into longmess() via confess(), cluck() or shortmess().
-# This gets appended with the stack trace messages which are generated for
-# each function call on the stack.
-
-sub longmess {
- {
- local($@, $!);
- # XXX fix require to not clear $@ or $!?
- # don't use require unless we need to (for Safe compartments)
- require Carp::Heavy unless $INC{"Carp/Heavy.pm"};
- }
- # Icky backwards compatibility wrapper. :-(
- my $call_pack = caller();
- if ($Internal{$call_pack} or $CarpInternal{$call_pack}) {
- return longmess_heavy(@_);
- }
- else {
- local $CarpLevel = $CarpLevel + 1;
- return longmess_heavy(@_);
- }
-}
-
-
-# shortmess() is called by carp() and croak() to skip all the way up to
-# the top-level caller's package and report the error from there. confess()
-# and cluck() generate a full stack trace so they call longmess() to
-# generate that. In verbose mode shortmess() calls longmess() so
-# you always get a stack trace
-
-sub shortmess { # Short-circuit &longmess if called via multiple packages
- {
- local($@, $!);
- # XXX fix require to not clear $@ or $!?
- # don't use require unless we need to (for Safe compartments)
- require Carp::Heavy unless $INC{"Carp/Heavy.pm"};
- }
- # Icky backwards compatibility wrapper. :-(
- my $call_pack = caller();
- local @CARP_NOT = caller();
- shortmess_heavy(@_);
-}
-
-
-# the following four functions call longmess() or shortmess() depending on
-# whether they should generate a full stack trace (confess() and cluck())
-# or simply report the caller's package (croak() and carp()), respectively.
-# confess() and croak() die, carp() and cluck() warn.
-
-sub croak { die shortmess @_ }
-sub confess { die longmess @_ }
-sub carp { warn shortmess @_ }
-sub cluck { warn longmess @_ }
-
-1;
projects / p5sagit/p5-mst-13.2.git / blobdiff