Re^3: Break string into array

Not only does your solution allow

my $s = q[dogs OR cats AND "flying fish" OR (shrimp AND squid)];
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it parses to the same as

my $s = q[dogs OR cats OR "flying fish" OR (shrimp AND squid)];
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And it also allows

my $s = q[OR dogs OR cats OR "flying fish" OR (shrimp AND squid)];
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Finally, quoted strings are left quoted. A parser shouldn't return literals. If you want to differentiate between quoted and unquoted terms, you'll need to add to the parse tree.

$VAR1 = [
  "OR",
  [ term   => "dogs"        ],
  [ term   => "cats"        ],
  [ phrase => "flying fish" ],
  [
    "AND",
    [ term => "shrimp" ],
    [ term => "squid"  ],
  ]
];
[download]

Comment on Re^3: Break string into array Select or Download Code

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Re^4: Break string into array by Anonymous Monk on Sep 18, 2009 at 15:23 UTC
That is all true, but it does satisfy the OPs requirement/example :)	[reply]
Re^5: Break string into array by ikegami (Patriarch) on Sep 18, 2009 at 16:22 UTC
No. Allowing AND and OR at the same level is explicitly disallowed by his requirements. It's clearly wrong to use AND when the string contains OR and vice-versa, even if it wasn't explicitly stated. I suppose there's no harm is allowing a leading OR or AND. Finally, the parser also didn't do it's job wrt quoted strings. A parser that doesn't parse is buggy.	[reply]