Good idea. My code was just an example. There are problems with the implementation, though.
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For starters, you cannot easily replace an existing file handle, so you failed to address the original question.
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No support for $,.
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No support for $\.
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No error code is returned. People won't be able to use this module when error checking is being done.
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No support for write, binmode, etc. People won't be able to use this module when these are called with the filehandle.
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Only your open function requires 5.8.0, and it could easily be rewritten to avoid that requirement.
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Using $/ as the line terminator would be better than \n because it would give more flexibility to the caller at no cost.
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_emit for //g would be more efficient as _emit while //g.
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Are you posting in the right place? Check out Where do I post X? to know for sure.
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Snippets of code should be wrapped in
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Want more info? How to link
or How to display code and escape characters
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