I have been trying for hours, to make this data structure into hash, I need
help. Thanks.
$str =
"
(dr1
<predicate>foo
<1>(dr2 <predicate>bar)
<2>a
)
";
$hash = {
"dr1" => {
"<1>" => {"dr2" => {"predicate"=> "bar"}},
"<2>" => "a"
}
};
dr1 and dr2 is a unique reference, the argument could nothing until arbitarily
long <[0-9]+>, the argument value is actually a repeating pattern of the whole
pattern.
The whole pattern is
$pattern =
/
\(
[a-z0-9]+ \s+ <predicate>[a-z]+ \s+ (<[0-9]+>$pattern)*
\)
/x
What could be the regular expression and algorithm to make the resulting hash ?
Thanks.
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