# walkoptree comes from B.xs
BEGIN {
- $B::VERSION = '1.34';
+ $B::VERSION = '1.52';
@B::EXPORT_OK = ();
# Our BOOT code needs $VERSION set, and will append to @EXPORT_OK.
parents comppadlist sv_undef compile_stats timing_info
begin_av init_av check_av end_av regex_padav dowarn
defstash curstash warnhook diehook inc_gv @optype
- @specialsv_name
- ), $] > 5.009 && 'unitcheck_av');
+ @specialsv_name unitcheck_av safename));
@B::SV::ISA = 'B::OBJECT';
@B::NULL::ISA = 'B::SV';
@B::PVNV::ISA = qw(B::PVIV B::NV);
@B::PVMG::ISA = 'B::PVNV';
@B::REGEXP::ISA = 'B::PVMG' if $] >= 5.011;
-# Change in the inheritance hierarchy post 5.9.0
-@B::PVLV::ISA = $] > 5.009 ? 'B::GV' : 'B::PVMG';
-# BM is eliminated post 5.9.5, but effectively is a specialisation of GV now.
-@B::BM::ISA = $] > 5.009005 ? 'B::GV' : 'B::PVMG';
+@B::INVLIST::ISA = 'B::PV' if $] >= 5.019;
+@B::PVLV::ISA = 'B::GV';
+@B::BM::ISA = 'B::GV';
@B::AV::ISA = 'B::PVMG';
@B::GV::ISA = 'B::PVMG';
@B::HV::ISA = 'B::PVMG';
@B::LOOP::ISA = 'B::LISTOP';
@B::PMOP::ISA = 'B::LISTOP';
@B::COP::ISA = 'B::OP';
+@B::METHOP::ISA = 'B::OP';
@B::SPECIAL::ISA = 'B::OBJECT';
-@B::optype = qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP);
+@B::optype = qw(OP UNOP BINOP LOGOP LISTOP PMOP SVOP PADOP PVOP LOOP COP METHOP);
# bytecode.pl contained the following comment:
# Nullsv *must* come first in the following so that the condition
# ($$sv == 0) can continue to be used to test (sv == Nullsv).
}
sub B::GV::SAFENAME {
- my $name = (shift())->NAME;
+ safename(shift()->NAME);
+}
+
+sub safename {
+ my $name = shift;
# The regex below corresponds to the isCONTROLVAR macro
# from toke.c
- $name =~ s/^([\cA-\cZ\c\\c[\c]\c?\c_\c^])/"^".
- chr( utf8::unicode_to_native( 64 ^ ord($1) ))/e;
+ $name =~ s/^\c?/^?/
+ or $name =~ s/^([\cA-\cZ\c\\c[\c]\c_\c^])/
+ "^" . chr( utf8::unicode_to_native( 64 ^ ord($1) ))/e;
# When we say unicode_to_native we really mean ascii_to_native,
- # which matters iff this is a non-ASCII platform (EBCDIC).
+ # which matters iff this is a non-ASCII platform (EBCDIC). '\c?' would
+ # not have to be special cased, except for non-ASCII.
return $name;
}
my $fullname;
no strict 'refs';
$prefix = '' unless defined $prefix;
- while (($sym, $ref) = each %$symref) {
+ foreach my $sym ( sort keys %$symref ) {
+ $ref= $symref->{$sym};
$fullname = "*main::".$prefix.$sym;
if ($sym =~ /::$/) {
$sym = $prefix . $sym;
=item amagic_generation
Returns the SV object corresponding to the C variable C<amagic_generation>.
+As of Perl 5.18, this is just an alias to C<PL_na>, so its value is
+meaningless.
=item init_av
=item comppadlist
-Returns the AV object (i.e. in class B::AV) of the global comppadlist.
+Returns the PADLIST object (i.e. in class B::PADLIST) of the global
+comppadlist. In Perl 5.16 and earlier it returns an AV object (class
+B::AV).
=item regex_padav
Returns a double-quote-surrounded escaped version of STR which can
be used as a string in Perl source code.
+=item safename(STR)
+
+This function returns the string with the first character modified if it
+is a control character. It converts it to ^X format first, so that "\cG"
+becomes "^G". This is used internally by L<B::GV::SAFENAME|/SAFENAME>, but
+you can call it directly.
+
=item class(OBJ)
Returns the class of an object without the part of the classname
=item threadsv_names
-In a perl compiled for threads, this returns a list of the special
-per-thread threadsv variables.
+This used to provide support for the old 5.005 threading module. It now
+does nothing.
=back
=item FLAGS
+=item GPFLAGS
+
+This last one is present only in perl 5.22.0 and higher.
+
=back
=head2 B::IO Methods
=item PADLIST
+Returns a B::PADLIST object under Perl 5.18 or higher, or a B::AV in
+earlier versions.
+
=item OUTSIDE
=item OUTSIDE_SEQ
=item const_sv
+=item NAME_HEK
+
+Returns the name of a lexical sub, otherwise C<undef>.
+
=back
=head2 B::HV Methods
=head2 OP-RELATED CLASSES
C<B::OP>, C<B::UNOP>, C<B::BINOP>, C<B::LOGOP>, C<B::LISTOP>, C<B::PMOP>,
-C<B::SVOP>, C<B::PADOP>, C<B::PVOP>, C<B::LOOP>, C<B::COP>.
+C<B::SVOP>, C<B::PADOP>, C<B::PVOP>, C<B::LOOP>, C<B::COP>, C<B::METHOP>.
These classes correspond in the obvious way to the underlying C
structures of similar names. The inheritance hierarchy mimics the
B::OP
|
- +---------------+--------+--------+-------+
- | | | | |
- B::UNOP B::SVOP B::PADOP B::COP B::PVOP
+ +----------+---------+--------+-------+---------+
+ | | | | | |
+ B::UNOP B::SVOP B::PADOP B::COP B::PVOP B::METHOP
,' `-.
/ `--.
B::BINOP B::LOGOP
/ \
B::LOOP B::PMOP
-Access methods correspond to the underlying C structre field names,
+Access methods correspond to the underlying C structure field names,
with the leading "class indication" prefix (C<"op_">) removed.
=head2 B::OP Methods
=item sibling
+=item parent
+
+Returns the OP's parent. If it has no parent, or if your perl wasn't built
+with C<-DPERL_OP_PARENT>, returns NULL.
+
=item name
This returns the op name as a string (e.g. "add", "rv2av").
Only when perl was compiled with ithreads.
+=item code_list
+
+Since perl 5.17.1
+
=back
=head2 B::SVOP METHOD
=item stashpv
+=item stashoff (threaded only)
+
=item file
=item cop_seq
=back
+=head2 B::METHOP Methods (Since Perl 5.22)
+
+=over 4
+
+=item first
+
+=item meth_sv
+
+=back
+
+=head2 OTHER CLASSES
+
+Perl 5.18 introduces a new class, B::PADLIST, returned by B::CV's
+C<PADLIST> method.
+
+=head2 B::PADLIST Methods
+
+=over 4
+
+=item MAX
+
+=item ARRAY
+
+A list of pads. The first one contains the names. These are currently
+B::AV objects, but that is likely to change in future versions.
+
+=item ARRAYelt
+
+Like C<ARRAY>, but takes an index as an argument to get only one element,
+rather than a list of all of them.
+
+=item REFCNT
+
+=back
+
+=head2 $B::overlay
+
+Although the optree is read-only, there is an overlay facility that allows
+you to override what values the various B::*OP methods return for a
+particular op. C<$B::overlay> should be set to reference a two-deep hash:
+indexed by OP address, then method name. Whenever a an op method is
+called, the value in the hash is returned if it exists. This facility is
+used by B::Deparse to "undo" some optimisations. For example:
+
+
+ local $B::overlay = {};
+ ...
+ if ($op->name eq "foo") {
+ $B::overlay->{$$op} = {
+ name => 'bar',
+ next => $op->next->next,
+ };
+ }
+ ...
+ $op->name # returns "bar"
+ $op->next # returns the next op but one
+
=head1 AUTHOR
https://perl5.git.perl.org / perl5.git / blobdiff