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author | Siep Kroonenberg <siepo@cybercomm.nl> | 2011-02-17 12:20:49 +0000 |
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committer | Siep Kroonenberg <siepo@cybercomm.nl> | 2011-02-17 12:20:49 +0000 |
commit | 316ee97c621496b0fe3267f57cce81bee44ca1e6 (patch) | |
tree | cb2cab1192b4f58a7971af19b213e980bceda4b4 /Master/tlpkg/tlperl/lib/exceptions.pl | |
parent | cd0f87b5d39480d85ad9bd4ee37f520f75bed560 (diff) |
Moving old tlperl prior to committing new one
git-svn-id: svn://tug.org/texlive/trunk@21422 c570f23f-e606-0410-a88d-b1316a301751
Diffstat (limited to 'Master/tlpkg/tlperl/lib/exceptions.pl')
-rwxr-xr-x | Master/tlpkg/tlperl/lib/exceptions.pl | 61 |
1 files changed, 0 insertions, 61 deletions
diff --git a/Master/tlpkg/tlperl/lib/exceptions.pl b/Master/tlpkg/tlperl/lib/exceptions.pl deleted file mode 100755 index ed1f927d270..00000000000 --- a/Master/tlpkg/tlperl/lib/exceptions.pl +++ /dev/null @@ -1,61 +0,0 @@ -# exceptions.pl -# tchrist@convex.com -# -# This library is no longer being maintained, and is included for backward -# compatibility with Perl 4 programs which may require it. -# -# In particular, this should not be used as an example of modern Perl -# programming techniques. -# -# -# Here's a little code I use for exception handling. It's really just -# glorfied eval/die. The way to use use it is when you might otherwise -# exit, use &throw to raise an exception. The first enclosing &catch -# handler looks at the exception and decides whether it can catch this kind -# (catch takes a list of regexps to catch), and if so, it returns the one it -# caught. If it *can't* catch it, then it will reraise the exception -# for someone else to possibly see, or to die otherwise. -# -# I use oddly named variables in order to make darn sure I don't conflict -# with my caller. I also hide in my own package, and eval the code in his. -# -# The EXCEPTION: prefix is so you can tell whether it's a user-raised -# exception or a perl-raised one (eval error). -# -# --tom -# -# examples: -# if (&catch('/$user_input/', 'regexp', 'syntax error') { -# warn "oops try again"; -# redo; -# } -# -# if ($error = &catch('&subroutine()')) { # catches anything -# -# &throw('bad input') if /^$/; - -sub catch { - package exception; - local($__code__, @__exceptions__) = @_; - local($__package__) = caller; - local($__exception__); - - eval "package $__package__; $__code__"; - if ($__exception__ = &'thrown) { - for (@__exceptions__) { - return $__exception__ if /$__exception__/; - } - &'throw($__exception__); - } -} - -sub throw { - local($exception) = @_; - die "EXCEPTION: $exception\n"; -} - -sub thrown { - $@ =~ /^(EXCEPTION: )+(.+)/ && $2; -} - -1; |