Perlito5 - js - implement special syntax "PATTERN" for split() - #22

Author: fglock

perlito5.pl

@@ -10192,6 +10192,17 @@ package Perlito5::AST::Apply;
         my $wantarray = shift;
         my $arg = $self->{'arguments'}->[0];
         return 'p5sub_prototype(' . $arg->emit_javascript2() . ', ' . Perlito5::Javascript2::escape_string($Perlito5::PKG_NAME) . ')'
+    }, 'split' => sub {
+        my $self = shift;
+        my $level = shift;
+        my $wantarray = shift;
+        my @js;
+        my $arg = $self->{'arguments'}->[0];
+        if ($arg && $arg->isa('Perlito5::AST::Apply') && $arg->{'code'} eq 'p5:m') {
+            push(@js, 'new RegExp(' . $arg->{'arguments'}->[0]->emit_javascript2() . ', ' . '"' . $arg->{'arguments'}->[1] . '"' . ')');
+            shift(@{$self->{'arguments'}})
+        }
+        return 'CORE.split(' . '[' . join(', ', @js, map($_->emit_javascript2(), @{$self->{'arguments'}})) . '], ' . Perlito5::Javascript2::to_context($wantarray) . ')'
     });
     sub Perlito5::AST::Apply::emit_javascript2 {
         my $self = shift;

src5/lib/Perlito5/Javascript2/Emitter.pm

@@ -2571,6 +2571,31 @@ package Perlito5::AST::Apply;
             return 'p5sub_prototype(' . $arg->emit_javascript2() . ', ' . Perlito5::Javascript2::escape_string($Perlito5::PKG_NAME) . ')';
         },
 
+        'split' => sub {
+            my $self      = shift;
+            my $level     = shift;
+            my $wantarray = shift;
+            my @js;
+            my $arg = $self->{arguments}->[0];
+            if ( $arg
+              && $arg->isa('Perlito5::AST::Apply')
+              && $arg->{code} eq 'p5:m'
+            ) {
+                # first argument of split() is a regex
+                push @js, 'new RegExp('
+                        . $arg->{arguments}->[0]->emit_javascript2() . ', '
+                        . '"' . $arg->{arguments}->[1] . '"'
+                    . ')';
+                shift @{ $self->{arguments} };
+            }
+            return 'CORE.split('
+                . '[' . join( ', ',
+                    @js,
+                    map( $_->emit_javascript2, @{ $self->{arguments} } ) )
+                . '], '
+                . Perlito5::Javascript2::to_context($wantarray)
+            . ')';
+        },
     );
 
     sub emit_javascript2 {