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| author | Robin Houston <robin@cpan.org> | 2001-04-22 23:14:50 +0100 |
|---|---|---|
| committer | Jarkko Hietaniemi <jhi@iki.fi> | 2001-04-22 20:52:13 +0000 |
| commit | 34a48b4b2c642540b102169c8b78c89beeebe902 (patch) | |
| tree | bcde612a187996a009c228c063d02201dd1da2b5 /ext/B/O.pm | |
| parent | 6f36ad4ab3b6497d1280576be438eea8cce4348e (diff) | |
| download | perl-34a48b4b2c642540b102169c8b78c89beeebe902.tar.gz | |
Support BEGIN blocks in B::Deparse (& more)
Message-ID: <20010422221450.A18921@puffinry.freeserve.co.uk>
p4raw-id: //depot/perl@9781
Diffstat (limited to 'ext/B/O.pm')
| -rw-r--r-- | ext/B/O.pm | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/ext/B/O.pm b/ext/B/O.pm index 338d8030c0..89352fb6e7 100644 --- a/ext/B/O.pm +++ b/ext/B/O.pm @@ -3,7 +3,16 @@ use B qw(minus_c save_BEGINs); use Carp; sub import { - my ($class, $backend, @options) = @_; + my ($class, @options) = @_; + my $quiet = 0; + if ($options[0] eq '-q') { + $quiet = 1; + shift @options; + open (SAVEOUT, ">&STDOUT"); + close STDOUT; + open (STDOUT, ">", \$O::BEGIN_output); + } + my $backend = shift (@options); eval q[ BEGIN { minus_c; @@ -11,6 +20,11 @@ sub import { } CHECK { + if ($quiet) { + close STDOUT; + open (STDOUT, ">&SAVEOUT"); + close SAVEOUT; + } use B::].$backend.q[ (); if ($@) { croak "use of backend $backend failed: $@"; @@ -38,12 +52,21 @@ O - Generic interface to Perl Compiler backends =head1 SYNOPSIS - perl -MO=Backend[,OPTIONS] foo.pl + perl -MO=[-q,]Backend[,OPTIONS] foo.pl =head1 DESCRIPTION This is the module that is used as a frontend to the Perl Compiler. +If you pass the C<-q> option to the module, then the STDOUT +filehandle will be redirected into the variable C<$O::BEGIN_output> +during compilation. This has the effect that any output printed +to STDOUT by BEGIN blocks or use'd modules will be stored in this +variable rather than printed. It's useful with those backends which +produce output themselves (C<Deparse>, C<Concise> etc), so that +their output is not confused with that generated by the code +being compiled. + =head1 CONVENTIONS Most compiler backends use the following conventions: OPTIONS |