You can use the
Marpa parser:
#!/usr/bin/perl
use strict;
use warnings;
use Data::Dumper;
use Marpa::R2;
my $g = << '__G__';
lexeme default = latm => 1
:start ::= Hash
:default ::= action => itself
Hash ::= '(' Pairs ')' action => hash
Pairs ::= Pair+ action => pairs
Pair ::= '(' Key Value ')' action => pair
Key ::= String
Value ::= String
| Pairs
String ~ [^\s()]+
whitespace ~ [\s]+
:discard ~ whitespace
__G__
my $grammar = 'Marpa::R2::Scanless::G'->new({ source => \$g });
my $input = '(
(SECTION (Section_KEY Value1)
(Another_KEY1 Value2) (KEY2 value3)
(KEY3 Value4))
(NEW_SECTION
(SUB_SECTION
(KEY4 Value5))
(NEW_SUB_SECTION (KEY5 Value6)
)
)
)';
my $recce = 'Marpa::R2::Scanless::R'->new({ grammar => $gram
+mar,
semantics_package => 'main
+',
});
$recce->read(\$input);
print Dumper $recce->value;
sub hash { $_[2] }
sub pairs { shift; +{ map @$_, @_ } }
sub pair { [ @_[2, 3] ] }
sub itself { $_[1] }
Output:
$VAR1 = \{
'SECTION' => {
'Section_KEY' => 'Value1',
'KEY2' => 'value3',
'Another_KEY1' => 'Value2',
'KEY3' => 'Value4'
},
'NEW_SECTION' => {
'NEW_SUB_SECTION' => {
'KEY5' => 'Value
+6'
},
'SUB_SECTION' => {
'KEY4' => 'Value5'
}
}
};
