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package Devel::StackTrace::Frame;
$Devel::StackTrace::Frame::VERSION = '2.00';
use strict;
use warnings;
# Create accessor routines
BEGIN {
no strict 'refs';
foreach my $f (
qw( package filename line subroutine hasargs
wantarray evaltext is_require hints bitmask args )
) {
next if $f eq 'args';
*{$f} = sub { my $s = shift; return $s->{$f} };
}
}
{
my @fields = (
qw( package filename line subroutine hasargs wantarray
evaltext is_require hints bitmask )
);
sub new {
my $proto = shift;
my $class = ref $proto || $proto;
my $self = bless {}, $class;
@{$self}{@fields} = @{ shift() };
# fixup unix-style paths on win32
$self->{filename} = File::Spec->canonpath( $self->{filename} );
$self->{args} = shift;
$self->{respect_overload} = shift;
$self->{max_arg_length} = shift;
$self->{message} = shift;
$self->{indent} = shift;
return $self;
}
}
sub args {
my $self = shift;
return @{ $self->{args} };
}
sub as_string {
my $self = shift;
my $first = shift;
my $p = shift;
my $sub = $self->subroutine;
# This code stolen straight from Carp.pm and then tweaked. All
# errors are probably my fault -dave
if ($first) {
$sub
= defined $self->{message}
? $self->{message}
: 'Trace begun';
}
else {
# Build a string, $sub, which names the sub-routine called.
# This may also be "require ...", "eval '...' or "eval {...}"
if ( my $eval = $self->evaltext ) {
if ( $self->is_require ) {
$sub = "require $eval";
}
else {
$eval =~ s/([\\\'])/\\$1/g;
$sub = "eval '$eval'";
}
}
elsif ( $sub eq '(eval)' ) {
$sub = 'eval {...}';
}
# if there are any arguments in the sub-routine call, format
# them according to the format variables defined earlier in
# this file and join them onto the $sub sub-routine string
#
# We copy them because they're going to be modified.
#
if ( my @a = $self->args ) {
for (@a) {
# set args to the string "undef" if undefined
$_ = "undef", next unless defined $_;
# hack!
$_ = $self->Devel::StackTrace::_ref_to_string($_)
if ref $_;
local $SIG{__DIE__};
local $@;
eval {
my $max_arg_length
= exists $p->{max_arg_length}
? $p->{max_arg_length}
: $self->{max_arg_length};
if ( $max_arg_length
&& length $_ > $max_arg_length ) {
substr( $_, $max_arg_length ) = '...';
}
s/'/\\'/g;
# 'quote' arg unless it looks like a number
$_ = "'$_'" unless /^-?[\d.]+$/;
# print control/high ASCII chars as 'M-<char>' or '^<char>'
s/([\200-\377])/sprintf("M-%c",ord($1)&0177)/eg;
s/([\0-\37\177])/sprintf("^%c",ord($1)^64)/eg;
};
if ( my $e = $@ ) {
$_ = $e =~ /malformed utf-8/i ? '(bad utf-8)' : '?';
}
}
# append ('all', 'the', 'arguments') to the $sub string
$sub .= '(' . join( ', ', @a ) . ')';
$sub .= ' called';
}
}
# If the user opted into indentation (a la Carp::confess), pre-add a tab
my $tab = $self->{indent} && !$first ? "\t" : q{};
return "${tab}$sub at " . $self->filename . ' line ' . $self->line;
}
1;
# ABSTRACT: A single frame in a stack trace
__END__
=pod
=head1 NAME
Devel::StackTrace::Frame - A single frame in a stack trace
=head1 VERSION
version 2.00
=head1 DESCRIPTION
See L<Devel::StackTrace> for details.
=for Pod::Coverage new
=head1 METHODS
See Perl's C<caller()> documentation for more information on what these
methods return.
=head2 $frame->package()
=head2 $frame->filename()
=head2 $frame->line()
=head2 $frame->subroutine()
=head2 $frame->hasargs()
=head2 $frame->wantarray()
=head2 $frame->evaltext()
Returns undef if the frame was not part of an eval.
=head2 $frame->is_require()
Returns undef if the frame was not part of a require.
=head2 $frame->args()
Returns the arguments passed to the frame. Note that any arguments that are
references are returned as references, not copies.
=head2 $frame->hints()
=head2 $frame->bitmask()
=head2 $frame->as_string()
Returns a string containing a description of the frame.
=head1 AUTHOR
Dave Rolsky <autarch@urth.org>
=head1 COPYRIGHT AND LICENSE
This software is Copyright (c) 2000 - 2014 by David Rolsky.
This is free software, licensed under:
The Artistic License 2.0 (GPL Compatible)
=cut
|
