Glob to Regex issue

dt667 has asked for the wisdom of the Perl Monks concerning the following question:

I am trying to use Text::Glob to convert various glob patterns to perl regex patterns. It appears to work fine for all but this one: \[hello\] The expected output is: (?=[^\.])\[hello\] but I am getting: (?=[^\.])[hello] Is my expected outcome wrong and the module correct? I've looked at the perl module and if I add

        elsif ($_ eq '[') {
            $regex .= $escaping ? "\\[" : $_;
        }
        elsif ($_ eq ']') {
            $regex .= $escaping ? "\\]" : $_;
        }
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at line 60, my expected result is produced. Again, is my logic flawed here?

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Re: Glob to Regex issue by SuicideJunkie (Vicar) on Nov 18, 2015 at 15:16 UTC
If the text in your source file is <`"\\["`>, then your string becomes <`\[`> and your regex looks for a literal <`[`> If the text in your source file is <`"\["`>, then your string becomes <`[`> and your regex sees the start of a character class. OR, you can use single quotes to avoid the interpolation: If the text in your source file is <`'\\['`>, then your string becomes <`\\[`> and your regex looks for a literal <`\[`> If the text in your source file is <`'\['`>, then your string becomes <`\[`> and your regex looks for a literal <`[`> If you are typing it as a one-liner into the command prompt, then you'll need twice as many backslashes of course.	[reply] [d/l] [select]

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Re: Glob to Regex issue
by SuicideJunkie (Vicar) on Nov 18, 2015 at 15:16 UTC

If the text in your source file is <"\\[">, then your string becomes <\[> and your regex looks for a literal <[>

If the text in your source file is <"\[">, then your string becomes <[> and your regex sees the start of a character class.

OR, you can use single quotes to avoid the interpolation:

If the text in your source file is <'\\['>, then your string becomes <\\[> and your regex looks for a literal <\[>

If the text in your source file is <'\['>, then your string becomes <\[> and your regex looks for a literal <[>

If you are typing it as a one-liner into the command prompt, then you'll need twice as many backslashes of course.

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