use base qw(Moo::Object);
use Sub::Quote;
use B 'perlstring';
+use Scalar::Util 'blessed';
+use overload ();
+use Module::Runtime qw(use_module);
BEGIN {
our $CAN_HAZ_XS =
!$ENV{MOO_XS_DISABLE}
&&
_maybe_load_module('Class::XSAccessor')
&&
- (Class::XSAccessor->VERSION > 1.06)
+ (eval { Class::XSAccessor->VERSION('1.07') })
;
}
+sub _die_overwrite
+{
+ my ($pkg, $method, $type) = @_;
+ die "You cannot overwrite a locally defined method ($method) with @{[ $type || 'an accessor' ]}";
+}
+
sub generate_method {
my ($self, $into, $name, $spec, $quote_opts) = @_;
+ $spec->{allow_overwrite}++ if $name =~ s/^\+//;
die "Must have an is" unless my $is = $spec->{is};
if ($is eq 'ro') {
$spec->{reader} = $name unless exists $spec->{reader};
} elsif ($is eq 'rw') {
- $spec->{accessor} = $name unless exists $spec->{accessor};
+ $spec->{accessor} = $name unless exists $spec->{accessor}
+ or ( $spec->{reader} and $spec->{writer} );
} elsif ($is eq 'lazy') {
- $spec->{init_arg} = undef unless exists $spec->{init_arg};
$spec->{reader} = $name unless exists $spec->{reader};
$spec->{lazy} = 1;
$spec->{builder} ||= '_build_'.$name unless $spec->{default};
+ } elsif ($is eq 'rwp') {
+ $spec->{reader} = $name unless exists $spec->{reader};
+ $spec->{writer} = "_set_${name}" unless exists $spec->{writer};
} elsif ($is ne 'bare') {
die "Unknown is ${is}";
}
+ if (exists $spec->{builder}) {
+ if(ref $spec->{builder}) {
+ die "Invalid builder for $into->$name - not a method name, coderef or"
+ . " code-convertible object"
+ unless ref $spec->{builder} eq 'CODE'
+ or (blessed($spec->{builder}) and eval { \&{$spec->{builder}} });
+ $spec->{builder_sub} = $spec->{builder};
+ $spec->{builder} = 1;
+ }
+ $spec->{builder} = '_build_'.$name if ($spec->{builder}||0) eq 1;
+ die "Invalid builder for $into->$name - not a valid method name"
+ if $spec->{builder} !~ /\A[A-Za-z_][A-Za-z0-9_]*(?:::[A-Za-z_][A-Za-z0-9_]*)*\z/;
+ }
+ if (($spec->{predicate}||0) eq 1) {
+ $spec->{predicate} = $name =~ /^_/ ? "_has${name}" : "has_${name}";
+ }
+ if (($spec->{clearer}||0) eq 1) {
+ $spec->{clearer} = $name =~ /^_/ ? "_clear${name}" : "clear_${name}";
+ }
+ if (($spec->{trigger}||0) eq 1) {
+ $spec->{trigger} = quote_sub('shift->_trigger_'.$name.'(@_)');
+ }
+
+ if (exists $spec->{coerce}) {
+ my $value = $spec->{coerce};
+ my $invalid = "Invalid coerce '" . overload::StrVal($value)
+ . "' for $into->$name - not a coderef";
+ die "$invalid or code-convertible object"
+ unless ref $value and (ref $value eq 'CODE' or blessed($value));
+ die "$invalid and could not be converted to a coderef: $@"
+ if !eval { \&$value };
+ }
+
+ if (exists $spec->{default}) {
+ my $value = $spec->{default};
+ if (!defined $value || ref $value) {
+ my $invalid = "Invalid default '" . overload::StrVal($value)
+ . "' for $into->$name - not a coderef or non-ref";
+ die "$invalid or code-convertible object"
+ unless ref $value and (ref $value eq 'CODE' or blessed($value));
+ die "$invalid and could not be converted to a coderef: $@"
+ if !eval { \&$value };
+ }
+ }
+
+
my %methods;
if (my $reader = $spec->{reader}) {
+ _die_overwrite($into, $reader, 'a reader')
+ if !$spec->{allow_overwrite} && *{_getglob("${into}::${reader}")}{CODE};
if (our $CAN_HAZ_XS && $self->is_simple_get($name, $spec)) {
$methods{$reader} = $self->_generate_xs(
- getters => $into, $reader, $name
+ getters => $into, $reader, $name, $spec
);
} else {
$self->{captures} = {};
}
}
if (my $accessor = $spec->{accessor}) {
+ _die_overwrite($into, $accessor, 'an accessor')
+ if !$spec->{allow_overwrite} && *{_getglob("${into}::${accessor}")}{CODE};
if (
our $CAN_HAZ_XS
&& $self->is_simple_get($name, $spec)
&& $self->is_simple_set($name, $spec)
) {
$methods{$accessor} = $self->_generate_xs(
- accessors => $into, $accessor, $name
+ accessors => $into, $accessor, $name, $spec
);
} else {
$self->{captures} = {};
}
}
if (my $writer = $spec->{writer}) {
+ _die_overwrite($into, $writer, 'a writer')
+ if !$spec->{allow_overwrite} && *{_getglob("${into}::${writer}")}{CODE};
if (
our $CAN_HAZ_XS
&& $self->is_simple_set($name, $spec)
) {
$methods{$writer} = $self->_generate_xs(
- setters => $into, $writer, $name
+ setters => $into, $writer, $name, $spec
);
} else {
$self->{captures} = {};
}
}
if (my $pred = $spec->{predicate}) {
+ _die_overwrite($into, $pred, 'a predicate')
+ if !$spec->{allow_overwrite} && *{_getglob("${into}::${pred}")}{CODE};
$methods{$pred} =
quote_sub "${into}::${pred}" =>
- ' '.$self->_generate_simple_has('$_[0]', $name)."\n"
+ ' '.$self->_generate_simple_has('$_[0]', $name, $spec)."\n"
;
}
+ if (my $pred = $spec->{builder_sub}) {
+ _install_coderef( "${into}::$spec->{builder}" => $spec->{builder_sub} );
+ }
if (my $cl = $spec->{clearer}) {
+ _die_overwrite($into, $cl, 'a clearer')
+ if !$spec->{allow_overwrite} && *{_getglob("${into}::${cl}")}{CODE};
$methods{$cl} =
quote_sub "${into}::${cl}" =>
- " delete \$_[0]->{${\perlstring $name}}\n"
+ $self->_generate_simple_clear('$_[0]', $name, $spec)."\n"
;
}
if (my $hspec = $spec->{handles}) {
map [ $_ => ref($hspec->{$_}) ? @{$hspec->{$_}} : $hspec->{$_} ],
keys %$hspec;
} elsif (!ref($hspec)) {
- map [ $_ => $_ ], Role::Tiny->methods_provided_by($hspec);
+ map [ $_ => $_ ], use_module('Role::Tiny')->methods_provided_by(use_module($hspec))
} else {
die "You gave me a handles of ${hspec} and I have no idea why";
}
};
- foreach my $spec (@specs) {
- my ($proxy, $target, @args) = @$spec;
+ foreach my $delegation_spec (@specs) {
+ my ($proxy, $target, @args) = @$delegation_spec;
+ _die_overwrite($into, $proxy, 'a delegation')
+ if !$spec->{allow_overwrite} && *{_getglob("${into}::${proxy}")}{CODE};
$self->{captures} = {};
$methods{$proxy} =
quote_sub "${into}::${proxy}" =>
}
if (my $asserter = $spec->{asserter}) {
$self->{captures} = {};
+
+
$methods{$asserter} =
- quote_sub "${into}::${asserter}" =>
- 'do { '.$self->_generate_get($name, $spec).qq! }||die "Attempted to access '${name}' but it is not set"!,
+ quote_sub "${into}::${asserter}" => $self->_generate_asserter($name, $spec),
delete $self->{captures}
;
}
sub _generate_get {
my ($self, $name, $spec) = @_;
- my $simple = $self->_generate_simple_get('$_[0]', $name);
+ my $simple = $self->_generate_simple_get('$_[0]', $name, $spec);
if ($self->is_simple_get($name, $spec)) {
$simple;
} else {
'do { '.$self->_generate_use_default(
'$_[0]', $name, $spec,
- $self->_generate_simple_has('$_[0]', $name),
- ).'; '.$simple.' }';
+ $self->_generate_simple_has('$_[0]', $name, $spec),
+ ).'; '
+ .($spec->{isa}
+ ?($self->_generate_isa_check($name, $simple, $spec->{isa}).'; ')
+ :''
+ )
+ .$simple.' }';
}
}
"exists ${me}->{${\perlstring $name}}";
}
+sub _generate_simple_clear {
+ my ($self, $me, $name) = @_;
+ " delete ${me}->{${\perlstring $name}}\n"
+}
+
sub generate_get_default {
my $self = shift;
$self->{captures} = {};
sub _generate_use_default {
my ($self, $me, $name, $spec, $test) = @_;
+ my $get_value = $self->_generate_get_default($me, $name, $spec);
+ if ($spec->{coerce}) {
+ $get_value = $self->_generate_coerce(
+ $name, $get_value,
+ $spec->{coerce}
+ )
+ }
$self->_generate_simple_set(
- $me, $name, $spec, $self->_generate_get_default($me, $name, $spec)
+ $me, $name, $spec, $get_value
).' unless '.$test;
}
sub _generate_get_default {
my ($self, $me, $name, $spec) = @_;
- $spec->{default}
- ? $self->_generate_call_code($name, 'default', $me, $spec->{default})
- : "${me}->${\$spec->{builder}}"
+ if (exists $spec->{default}) {
+ ref $spec->{default}
+ ? $self->_generate_call_code($name, 'default', $me, $spec->{default})
+ : perlstring $spec->{default};
+ }
+ else {
+ "${me}->${\$spec->{builder}}"
+ }
}
sub generate_simple_get {
if ($coerce) {
$code .=
" \$value = "
- .$self->_generate_coerce($name, '$self', '$value', $coerce).";\n";
+ .$self->_generate_coerce($name, '$value', $coerce).";\n";
}
if ($isa_check) {
$code .=
($code, delete $self->{captures});
}
+sub _attr_desc {
+ my ($name, $init_arg) = @_;
+ return perlstring($name) if !defined($init_arg) or $init_arg eq $name;
+ return perlstring($name).' (constructor argument: '.perlstring($init_arg).')';
+}
+
sub _generate_coerce {
- my ($self, $name, $obj, $value, $coerce) = @_;
- $self->_generate_call_code($name, 'coerce', "${value}", $coerce);
+ my ($self, $name, $value, $coerce, $init_arg) = @_;
+ $self->_generate_die_prefix(
+ "coercion for ${\_attr_desc($name, $init_arg)} failed: ",
+ $self->_generate_call_code($name, 'coerce', "${value}", $coerce)
+ );
}
sub generate_trigger {
($code, delete $self->{captures});
}
+sub _generate_die_prefix {
+ my ($self, $prefix, $inside) = @_;
+ "do {\n"
+ .' my $sig_die = $SIG{__DIE__} || sub { die $_[0] };'."\n"
+ .' local $SIG{__DIE__} = sub {'."\n"
+ .' $sig_die->(ref($_[0]) ? $_[0] : '.perlstring($prefix).'.$_[0]);'."\n"
+ .' };'."\n"
+ .$inside
+ ."}\n"
+}
+
sub _generate_isa_check {
- my ($self, $name, $value, $check) = @_;
- $self->_generate_call_code($name, 'isa_check', $value, $check);
+ my ($self, $name, $value, $check, $init_arg) = @_;
+ $self->_generate_die_prefix(
+ "isa check for ${\_attr_desc($name, $init_arg)} failed: ",
+ $self->_generate_call_code($name, 'isa_check', $value, $check)
+ );
}
sub _generate_call_code {
my ($self, $name, $type, $values, $sub) = @_;
+ $sub = \&{$sub} if blessed($sub); # coderef if blessed
if (my $quoted = quoted_from_sub($sub)) {
my $code = $quoted->[1];
- my $at_ = '@_ = ('.$values.');';
if (my $captures = $quoted->[2]) {
my $cap_name = qq{\$${type}_captures_for_${name}};
$self->{captures}->{$cap_name} = \$captures;
Sub::Quote::inlinify(
- $code, $values, Sub::Quote::capture_unroll($cap_name, $captures, 6)
+ $code, $values, Sub::Quote::capture_unroll($cap_name, $captures, 6), 1
);
} else {
- Sub::Quote::inlinify($code, $values);
+ Sub::Quote::inlinify($code, $values, undef, 1);
}
} else {
my $cap_name = qq{\$${type}_for_${name}};
}
sub _generate_populate_set {
- my ($self, $me, $name, $spec, $source, $test) = @_;
+ my ($self, $me, $name, $spec, $source, $test, $init_arg) = @_;
if ($self->has_eager_default($name, $spec)) {
my $get_indent = ' ' x ($spec->{isa} ? 6 : 4);
my $get_default = $self->_generate_get_default(
.$get_default
."\n${get_indent})"
: $get_default;
- if ( $spec->{coerce} ) {
- $get_value = $self->_generate_coerce(
- $name, $me, $get_value,
- $spec->{coerce}
- )
+ if ($spec->{coerce}) {
+ $get_value = $self->_generate_coerce(
+ $name, $get_value,
+ $spec->{coerce}, $init_arg
+ )
}
($spec->{isa}
? " {\n my \$value = ".$get_value.";\n "
.$self->_generate_isa_check(
- $name, '$value', $spec->{isa}
+ $name, '$value', $spec->{isa}, $init_arg
).";\n"
.' '.$self->_generate_simple_set($me, $name, $spec, '$value').";\n"
." }\n"
.($spec->{trigger}
? ' '
.$self->_generate_trigger(
- $name, $me, $self->_generate_simple_get($me, $name),
+ $name, $me, $self->_generate_simple_get($me, $name, $spec),
$spec->{trigger}
)." if ${test};\n"
: ''
.($spec->{coerce}
? " $source = "
.$self->_generate_coerce(
- $name, $me, $source,
- $spec->{coerce}
+ $name, $source,
+ $spec->{coerce}, $init_arg
).";\n"
: ""
)
.($spec->{isa}
? " "
.$self->_generate_isa_check(
- $name, $source, $spec->{isa}
+ $name, $source, $spec->{isa}, $init_arg
).";\n"
: ""
)
.($spec->{trigger}
? " "
.$self->_generate_trigger(
- $name, $me, $self->_generate_simple_get($me, $name),
+ $name, $me, $self->_generate_simple_get($me, $name, $spec),
$spec->{trigger}
).";\n"
: ""
}
}
-sub generate_multi_set {
- my ($self, $me, $to_set, $from) = @_;
- "\@{${me}}{qw(${\join ' ', @$to_set})} = $from";
+sub _generate_core_set {
+ my ($self, $me, $name, $spec, $value) = @_;
+ my $name_str = perlstring $name;
+ "${me}->{${name_str}} = ${value}";
}
sub _generate_simple_set {
my ($self, $me, $name, $spec, $value) = @_;
my $name_str = perlstring $name;
- my $simple = "${me}->{${name_str}} = ${value}";
if ($spec->{weak_ref}) {
- { local $@; require Scalar::Util; }
+ $value = '$preserve = '.$value;
+ my $simple = $self->_generate_core_set($me, $name, $spec, $value);
+ require Scalar::Util;
# Perl < 5.8.3 can't weaken refs to readonly vars
# (e.g. string constants). This *can* be solved by:
#
# but requires XS and is just too damn crazy
# so simply throw a better exception
- Moo::_Utils::lt_5_8_3() ? <<"EOC" : "Scalar::Util::weaken(${simple})";
-
- eval { Scalar::Util::weaken($simple); 1 } or do {
- if( \$@ =~ /Modification of a read-only value attempted/) {
- { local $@; require Carp; }
- Carp::croak( sprintf (
- 'Reference to readonly value in "%s" can not be weakened on Perl < 5.8.3',
- $name_str,
- ) );
- } else {
- die \$@;
+ my $weak_simple = "my \$preserve; Scalar::Util::weaken(${simple}); no warnings 'void'; \$preserve";
+ Moo::_Utils::lt_5_8_3() ? <<"EOC" : $weak_simple;
+
+ my \$preserve;
+ eval { Scalar::Util::weaken($simple); 1 }
+ ? do { no warnings 'void'; \$preserve; }
+ : do {
+ if( \$@ =~ /Modification of a read-only value attempted/) {
+ require Carp;
+ Carp::croak( sprintf (
+ 'Reference to readonly value in "%s" can not be weakened on Perl < 5.8.3',
+ $name_str,
+ ) );
+ } else {
+ die \$@;
+ }
}
- };
EOC
} else {
- $simple;
+ $self->_generate_core_set($me, $name, $spec, $value);
}
}
."\n : ".$self->_generate_get($name, $spec)."\n )";
}
+sub _generate_asserter {
+ my ($self, $name, $spec) = @_;
+
+ "do {\n"
+ ." my \$val = ".$self->_generate_get($name, $spec).";\n"
+ ." unless (".$self->_generate_simple_has('$_[0]', $name, $spec).") {\n"
+ .qq! die "Attempted to access '${name}' but it is not set";\n!
+ ." }\n"
+ ." \$val;\n"
+ ."}\n";
+}
sub _generate_delegation {
my ($self, $asserter, $target, $args) = @_;
my $arg_string = do {
my ($self, $type, $into, $name, $slot) = @_;
Class::XSAccessor->import(
class => $into,
- $type => { $name => $slot }
+ $type => { $name => $slot },
+ replace => 1,
);
$into->can($name);
}
+sub default_construction_string { '{}' }
+
1;
projects / gitmo/Moo.git / blobdiff