stat() can also return no arguments if the file can't be found. Hopefully, our %ops...

[perl/modules/Sub-Nary.git] / lib / Sub / Nary.pm

diff --git a/lib/Sub/Nary.pm b/lib/Sub/Nary.pm
index f2b53439d92c0bf7fbff1398c0ab7651dc4eaf38..4a02bc2524b6c397f618e568f1870fbd3b57f16f 100644 (file)
--- a/lib/Sub/Nary.pm
+++ b/lib/Sub/Nary.pm
@@ -42,7 +42,7 @@ This module uses the L<B> framework to walk into subroutines and try to guess ho
 
 The usual constructor. Currently takes no argument.
 
-=head2 C<nary $coderf>
+=head2 C<nary $coderef>
 
 Takes a code reference to a named or anonymous subroutine, and returns a hash reference whose keys are the possible numbers of returning scalars, and the corresponding values the "probability" to get them. The special key C<'list'> is used to denote a possibly infinite number of returned arguments. The return value hence would look at
 
@@ -102,7 +102,7 @@ returns C<3> or C<4> arguments with probability C<1/2> ; and
 
 never returns C<1> argument but returns C<2> with probability C<1/2 * 1/2 = 1/4>, C<3> with probability C<1/2 * 1/2 + 1/2 * 1/2 = 1/2> and C<4> with probability C<1/4> too.
 
-=item * The C<'list'> state is absorbant in regard of all the other ones.
+=item * The C<list> state is absorbing in regard of all the other ones.
 
 This is just a pedantic way to say that "list + fixed length = list".
 That's why
@@ -112,7 +112,8 @@ That's why
     }
 
 is considered as always returning an unbounded list.
-The convolution law also does not behave the same when C<list> elements are involved : in the following example,
+
+Also, the convolution law does not behave the same when C<list> elements are involved : in the following example,
 
     sub oneorlist {
      if (rand < 0.1) {
@@ -202,7 +203,11 @@ $ops{$_} = 0      for qw/stub nextstate/;
 $ops{$_} = 1      for qw/padsv/;
 $ops{$_} = 'list' for qw/padav/;
 $ops{$_} = 'list' for qw/padhv rv2hv/;
-$ops{$_} = 'list' for qw/padany flip match/;
+$ops{$_} = 'list' for qw/padany flip match entereval readline/;
+$ops{stat}      = { 0 => 0.5, 13 => 0.5 };
+$ops{caller}    = sub { my @a = caller 0; scalar @a }->();
+$ops{localtime} = do { my @a = localtime; scalar @a };
+$ops{gmtime}    = do { my @a = gmtime; scalar @a };
 
 sub enter {
  my ($self, $cv) = @_;
@@ -250,7 +255,11 @@ sub expect_list {
  my $n = name($op);
  my $meth = $self->can('pp_' . $n);
  return $self->$meth($op) if $meth;
- return $ops{$n} => 0 if exists $ops{$n};
+ if (exists $ops{$n}) {
+  my $r = $ops{$n};
+  $r = { %$r } if ref $r eq 'HASH';
+  return $r => 0;
+ }
 
  if ($op->flags & OPf_KIDS) {
   my @res = (0);
@@ -279,7 +288,7 @@ sub expect_any {
 
  return ($self->expect_list($op))[0] => 1 if name($op) eq 'return';
 
- if (class($op) eq 'LOGOP') {
+ if (class($op) eq 'LOGOP' and not null $op->first) {
   my @res;
   my ($p, $r);