Integrate:

[p5sagit/p5-mst-13.2.git] / lib / diagnostics.pm

diff --git a/lib/diagnostics.pm b/lib/diagnostics.pm
index b027b74..1ba70c5 100755 (executable)
--- a/lib/diagnostics.pm
+++ b/lib/diagnostics.pm
@@ -4,7 +4,7 @@ package diagnostics;
 
 diagnostics - Perl compiler pragma to force verbose warning diagnostics
 
-splain - standalone program to do the same thing
+splain - filter to produce verbose descriptions of perl warning diagnostics
 
 =head1 SYNOPSIS
 
@@ -16,7 +16,7 @@ As a pragma:
     enable  diagnostics;
     disable diagnostics;
 
-Aa a program:
+As a program:
 
     perl program 2>diag.out
     splain [-v] [-p] diag.out
@@ -168,10 +168,10 @@ Tom Christiansen <F<tchrist@mox.perl.com>>, 25 June 1995.
 =cut
 
 use strict;
-use 5.005_64;
+use 5.006;
 use Carp;
 
-our $VERSION = 1.0;
+our $VERSION = 1.1;
 our $DEBUG;
 our $VERBOSE;
 our $PRETTY;
@@ -195,6 +195,12 @@ my @trypod = (
 unshift @trypod, "./pod/perldiag.pod" if -e "pod/perldiag.pod";
 (my $PODFILE) = ((grep { -e } @trypod), $trypod[$#trypod])[0];
 
+if ($^O eq 'MacOS') {
+    # just updir one from each lib dir, we'll find it ...
+    ($PODFILE) = grep { -e } map { "$_:pod:perldiag.pod" } @INC;
+}
+
+
 $DEBUG ||= 0;
 my $WHOAMI = ref bless [];  # nobody's business, prolly not even mine
 
@@ -405,7 +411,7 @@ sub import {
     shift;
     $^W = 1; # yup, clobbered the global variable; 
             # tough, if you want diags, you want diags.
-    return if $SIG{__WARN__} eq \&warn_trap;
+    return if defined $SIG{__WARN__} && ($SIG{__WARN__} eq \&warn_trap);
 
     for (@_) {
 
@@ -470,11 +476,18 @@ sub death_trap {
     if (caller eq $WHOAMI) { print STDERR "INTERNAL EXCEPTION: $exception"; } 
     &$olddie if defined $olddie and $olddie and $olddie ne \&death_trap;
 
+    return if $in_eval;
+
     # We don't want to unset these if we're coming from an eval because
-    # then we've turned off diagnostics. (Actually what does this next
-    # line do?  -PSeibel)
-    $SIG{__DIE__} = $SIG{__WARN__} = '' unless $in_eval;
+    # then we've turned off diagnostics.
+
+    # Switch off our die/warn handlers so we don't wind up in our own
+    # traps.
+    $SIG{__DIE__} = $SIG{__WARN__} = '';
+
+    # Have carp skip over death_trap() when showing the stack trace.
     local($Carp::CarpLevel) = 1;
+
     confess "Uncaught exception from user code:\n\t$exception";
        # up we go; where we stop, nobody knows, but i think we die now
        # but i'm deeply afraid of the &$olddie guy reraising and us getting