use warnings;
use Digest::SHA qw( sha1_hex );
use File::Spec;
-use Class::Unload;
+use Scalar::Util qw(blessed);
+use Try::Tiny;
+use Carp qw(carp);
our $VERSION = '1.59';
our $DEFAULT_COMMENT = '-- ';
debug normalize_name header_comment parse_list_arg truncate_id_uniquely
$DEFAULT_COMMENT parse_mysql_version parse_dbms_version
ddl_parser_instance
+ throw ex2err carp_ro
);
use constant COLLISION_TAG_LENGTH => 8;
eval "require SQL::Translator::Parser::$type"
or die "Unable to load grammar-spec container SQL::Translator::Parser::$type:\n$@";
+ # handle DB2 in a special way, since the grammar source was lost :(
+ if ($type eq 'DB2') {
+ require SQL::Translator::Parser::DB2::Grammar;
+ return SQL::Translator::Parser::DB2::Grammar->new;
+ }
+
require Parse::RecDescent;
return Parse::RecDescent->new(do {
no strict 'refs';
});
# this is disabled until RT#74593 is resolved
-=begin for general sadness
+
+=begin sadness
unless ($parsers_libdir) {
# instance shares global state with all its siblings
# What we do here is gross, but scarily efficient - the parser compilation
# is much much slower than an unload/reload cycle
+ require Class::Unload;
Class::Unload->unload($precompiled_mod);
# There is also a sub-namespace that P::RD uses, but simply unsetting
}
return $precompiled_mod->new;
+
+=end sadness
+
=cut
}
;
}
+{
+ package SQL::Translator::Utils::Error;
+
+ use overload
+ '""' => sub { ${$_[0]} },
+ fallback => 1;
+
+ sub new {
+ my ($class, $msg) = @_;
+ bless \$msg, $class;
+ }
+}
+
+sub throw {
+ die SQL::Translator::Utils::Error->new($_[0]);
+}
+
+sub ex2err {
+ my ($orig, $self, @args) = @_;
+ return try {
+ $self->$orig(@args);
+ } catch {
+ die $_ unless blessed($_) && $_->isa("SQL::Translator::Utils::Error");
+ $self->error("$_");
+ };
+}
+
+sub carp_ro {
+ my ($name) = @_;
+ return sub {
+ my ($orig, $self) = (shift, shift);
+ carp "'$name' is a read-only accessor" if @_;
+ return $self->$orig;
+ };
+}
+
1;
=pod
or 'native') transforms the string to the given target style.
to
+=head2 throw
+
+Throws the provided string as an object that will stringify back to the
+original string. This stops it from being mangled by L<Moo>'s C<isa>
+code.
+
+=head2 ex2err
+
+Wraps an attribute accessor to catch any exception raised using
+L</throw> and store them in C<< $self->error() >>, finally returning
+undef. A reference to this function can be passed directly to
+L<Moo/around>.
+
+ around foo => \&ex2err;
+
+ around bar => sub {
+ my ($orig, $self) = (shift, shift);
+ return ex2err($orig, $self, @_) if @_;
+ ...
+ };
+
+=head2 carp_ro
+
+Takes a field name and returns a reference to a function can be used
+L<around|Moo/around> a read-only accessor to make it L<carp|Carp/carp>
+instead of die when passed an argument.
+
=head1 AUTHORS
Darren Chamberlain E<lt>darren@cpan.orgE<gt>,