1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74
|
#!/usr/bin/perl
use v5.14;
use warnings;
# DO NOT RELY ON THIS AS A REAL JSON PARSER
# It is not intended to be used actually as a JSON parser, simply to stand as
# an example of how you might use Parser::MGC to parse a JSON-like syntax
# It doesn't handle things like floats, booleans or quoting of dict keys
package JsonlikeParser;
use base qw( Parser::MGC );
use Syntax::Keyword::Try;
sub parse
{
my $self = shift;
$self->any_of(
'token_int',
'token_string',
sub { $self->committed_scope_of( "[", 'parse_list', "]" ) },
sub { $self->committed_scope_of( "{", 'parse_dict', "}" ) },
sub { $self->commit; $self->fail( "Expected integer, string, list, or dictionary" ) },
);
}
sub parse_list
{
my $self = shift;
return $self->list_of( ",", 'parse' );
}
sub parse_dict
{
my $self = shift;
my %ret;
$self->list_of( ",", sub {
my $key = $self->token_ident;
$self->expect( ":" );
$self->commit;
$ret{$key} = $self->parse;
} );
return \%ret
}
use Data::Dumper;
if( !caller ) {
my $parser = __PACKAGE__->new;
while( defined( my $line = <STDIN> ) ) {
try {
my $ret = $parser->from_string( $line );
print Dumper( $ret );
}
catch ( $e ) {
print $e;
}
}
}
1;
|