my ($self, $map) = @_;
# trim the mods and filters
- my $mods = []; my $filt = [];
- for my $m (@{$map->{mods}})
- { $m =~ s/^m://; push @{$mods}, $m }
- for my $f (@{$map->{filt}})
- { $f =~ s/^f://; push @{$filt}, $f }
+ my $mods = []; my %mods = ();
+ my $filt = []; my %filt = ();
+ for my $m (@{$map->{mods}}) {
+ die "Modifier collision '$m' at line $." if $mods{$m};
+ $m =~ s/^m://;
+ push @{$mods}, $m; $mods{$m} = 1;
+ }
+ for my $f (@{$map->{filt}}) {
+ die "Modifier collision '$f' at line $." if $filt{$f};
+ $f =~ s/^f://;
+ push @{$filt}, $f; $filt{$f} = 1;
+ }
$map->{mods} = $mods;
$map->{filt} = $filt;