use strict;
use warnings;
use base 'Exporter';
+use Carp;
-our %dependencies = (
- 'Scalar::Util' => {
- 'blessed' => do {
- do {
- no strict 'refs';
+BEGIN {
+ our %dependencies = (
+ 'Scalar::Util' => {
+
+# VVVVV CODE TAKEN FROM SCALAR::UTIL VVVVV
+ 'blessed' => do {
*UNIVERSAL::a_sub_not_likely_to_be_here = sub {
my $ref = ref($_[0]);
# but not XS
return $ref eq 'GLOB' ? undef : $ref;
};
- };
- sub {
+ sub {
+ local($@, $SIG{__DIE__}, $SIG{__WARN__});
+ length(ref($_[0]))
+ ? eval { $_[0]->a_sub_not_likely_to_be_here }
+ : undef;
+ },
+ },
+ 'looks_like_number' => sub {
+ local $_ = shift;
+
+ # checks from perlfaq4
+ return 0 if !defined($_) or ref($_);
+ return 1 if (/^[+-]?\d+$/); # is a +/- integer
+ return 1 if (/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/); # a C float
+ return 1 if ($] >= 5.008 and /^(Inf(inity)?|NaN)$/i) or ($] >= 5.006001 and /^Inf$/i);
+
+ 0;
+ },
+ 'reftype' => sub {
local($@, $SIG{__DIE__}, $SIG{__WARN__});
- length(ref($_[0]))
- ? eval { $_[0]->a_sub_not_likely_to_be_here }
- : undef;
+ my $r = shift;
+ my $t;
+
+ length($t = ref($r)) or return undef;
+
+ # This eval will fail if the reference is not blessed
+ eval { $r->a_sub_not_likely_to_be_here; 1 }
+ ? do {
+ $t = eval {
+ # we have a GLOB or an IO. Stringify a GLOB gives it's name
+ my $q = *$r;
+ $q =~ /^\*/ ? "GLOB" : "IO";
+ }
+ or do {
+ # OK, if we don't have a GLOB what parts of
+ # a glob will it populate.
+ # NOTE: A glob always has a SCALAR
+ local *glob = $r;
+ defined *glob{ARRAY} && "ARRAY"
+ or defined *glob{HASH} && "HASH"
+ or defined *glob{CODE} && "CODE"
+ or length(ref(${$r})) ? "REF" : "SCALAR";
+ }
+ }
+ : $t
},
- },
- 'looks_like_number' => sub {
- local $_ = shift;
+ 'openhandle' => sub {
+ my $fh = shift;
+ my $rt = reftype($fh) || '';
- # checks from perlfaq4
- return 0 if !defined($_) or ref($_);
- return 1 if (/^[+-]?\d+$/); # is a +/- integer
- return 1 if (/^([+-]?)(?=\d|\.\d)\d*(\.\d*)?([Ee]([+-]?\d+))?$/); # a C float
- return 1 if ($] >= 5.008 and /^(Inf(inity)?|NaN)$/i) or ($] >= 5.006001 and /^Inf$/i);
+ return defined(fileno($fh)) ? $fh : undef
+ if $rt eq 'IO';
- 0;
+ if (reftype(\$fh) eq 'GLOB') { # handle openhandle(*DATA)
+ $fh = \(my $tmp=$fh);
+ }
+ elsif ($rt ne 'GLOB') {
+ return undef;
+ }
+
+ (tied(*$fh) or defined(fileno($fh)))
+ ? $fh : undef;
+ },
+ weaken => {
+ loaded => \&Scalar::Util::weaken,
+ not_loaded => sub { die "Scalar::Util required for weak reference support" },
+ },
+# ^^^^^ CODE TAKEN FROM SCALAR::UTIL ^^^^^
},
- },
- 'MRO::Compat' => {
- 'get_linear_isa' => {
- loaded => \&mro::get_linear_isa,
- not_loaded => do {
- # this recurses so it isn't pretty
- my $code;
- $code = sub {
- no strict 'refs';
-
- my $classname = shift;
-
- my @lin = ($classname);
- my %stored;
- foreach my $parent (@{"$classname\::ISA"}) {
- my $plin = $code->($parent);
- foreach (@$plin) {
- next if exists $stored{$_};
- push(@lin, $_);
- $stored{$_} = 1;
+ 'MRO::Compat' => {
+# VVVVV CODE TAKEN FROM MRO::COMPAT VVVVV
+ 'get_linear_isa' => {
+ loaded => \&mro::get_linear_isa,
+ not_loaded => do {
+ # this recurses so it isn't pretty
+ my $code;
+ $code = sub {
+ no strict 'refs';
+
+ my $classname = shift;
+
+ my @lin = ($classname);
+ my %stored;
+ foreach my $parent (@{"$classname\::ISA"}) {
+ my $plin = $code->($parent);
+ foreach (@$plin) {
+ next if exists $stored{$_};
+ push(@lin, $_);
+ $stored{$_} = 1;
+ }
}
+ return \@lin;
}
- return \@lin;
- }
+ },
},
+# ^^^^^ CODE TAKEN FROM MRO::COMPAT ^^^^^
},
- },
-);
+# VVVVV CODE TAKEN FROM TEST::EXCEPTION VVVVV
+ 'Test::Exception' => do {
-our @EXPORT_OK = map { keys %$_ } values %dependencies;
+ my $Tester;
-for my $module_name (keys %dependencies) {
- (my $file = "$module_name.pm") =~ s{::}{/}g;
+ my $is_exception = sub {
+ my $exception = shift;
+ return ref $exception || $exception ne '';
+ };
- my $loaded = do {
- local $SIG{__DIE__} = 'DEFAULT';
- eval "require '$file'; 1";
- };
+ my $exception_as_string = sub {
+ my ( $prefix, $exception ) = @_;
+ return "$prefix normal exit" unless $is_exception->( $exception );
+ my $class = ref $exception;
+ $exception = "$class ($exception)"
+ if $class && "$exception" !~ m/^\Q$class/;
+ chomp $exception;
+ return "$prefix $exception";
+ };
+ my $try_as_caller = sub {
+ my $coderef = shift;
+ eval { $coderef->() };
+ $@;
+ };
- for my $method_name (keys %{ $dependencies{ $module_name } }) {
- my $producer = $dependencies{$module_name}{$method_name};
- my $implementation;
+ {
+ 'throws_ok' => sub (&$;$) {
+ my ( $coderef, $expecting, $description ) = @_;
+ Carp::croak "throws_ok: must pass exception class/object or regex"
+ unless defined $expecting;
+ $description = $exception_as_string->( "threw", $expecting )
+ unless defined $description;
+ my $exception = $try_as_caller->($coderef);
- if (ref($producer) eq 'HASH') {
- $implementation = $loaded
- ? $producer->{loaded}
- : $producer->{not_loaded};
- }
- else {
- $implementation = $loaded
- ? $module_name->can($method_name)
- : $producer;
- }
+ $Tester ||= Test::Builder->new;
+
+ my $regex = $Tester->maybe_regex( $expecting );
+ my $ok = $regex
+ ? ( $exception =~ m/$regex/ )
+ : eval {
+ $exception->isa( ref $expecting ? ref $expecting : $expecting )
+ };
+ $Tester->ok( $ok, $description );
+ unless ( $ok ) {
+ $Tester->diag( $exception_as_string->( "expecting:", $expecting ) );
+ $Tester->diag( $exception_as_string->( "found:", $exception ) );
+ };
+ $@ = $exception;
+ return $ok;
+ },
+ 'lives_ok' => sub (&;$) {
+ my ( $coderef, $description ) = @_;
+ my $exception = $try_as_caller->( $coderef );
+
+ $Tester ||= Test::Builder->new;
- no strict 'refs';
- *{ __PACKAGE__ . '::' . $method_name } = $implementation;
+ my $ok = $Tester->ok( ! $is_exception->( $exception ), $description );
+ $Tester->diag( $exception_as_string->( "died:", $exception ) ) unless $ok;
+ $@ = $exception;
+ return $ok;
+ },
+ },
+ },
+ );
+
+ our %loaded;
+
+ our @EXPORT_OK = map { keys %$_ } values %dependencies;
+ our %EXPORT_TAGS = (
+ all => \@EXPORT_OK,
+ test => [qw/throws_ok lives_ok/],
+ );
+
+ for my $module_name (keys %dependencies) {
+ my $loaded = do {
+ local $SIG{__DIE__} = 'DEFAULT';
+ eval "require $module_name; 1";
+ };
+
+ $loaded{$module_name} = $loaded;
+
+ for my $method_name (keys %{ $dependencies{ $module_name } }) {
+ my $producer = $dependencies{$module_name}{$method_name};
+ my $implementation;
+
+ if (ref($producer) eq 'HASH') {
+ $implementation = $loaded
+ ? $producer->{loaded}
+ : $producer->{not_loaded};
+ }
+ else {
+ $implementation = $loaded
+ ? $module_name->can($method_name)
+ : $producer;
+ }
+
+ no strict 'refs';
+ *{ __PACKAGE__ . '::' . $method_name } = $implementation;
+ }
}
}
1;
+__END__
+
+=head1 NAME
+
+Mouse::Util - features, with or without their dependencies
+
+=head1 IMPLEMENTATIONS FOR
+
+=head2 L<MRO::Compat>
+
+=head3 get_linear_isa
+
+=head2 L<Scalar::Util>
+
+=head3 blessed
+
+=head3 looks_like_number
+
+=head3 reftype
+
+=head3 openhandle
+
+=head3 weaken
+
+C<weaken> I<must> be implemented in XS. If the user tries to use C<weaken>
+without L<Scalar::Util>, an error is thrown.
+
+=head2 Test::Exception
+
+=head3 throws_ok
+
+=head3 lives_ok
+
+=cut
+
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