From: Samuel Williams <space.ship.traveller@...>
Date: 2011-02-09T18:35:45+09:00
Subject: Proposal: String#interpolate for safe templating

Hi,

I'm curious if anyone has considered a method called interpolate:

class String
	def interpolate(binding, filename, lineno)
		... magic ...
	end
end

It would have a similar effect as %Q, but the input would already exist as a string rather than being parsed. This would avoid lots of escaping issues. i.e.

	eval("%Q{" + buffer + "}") is fine as long as buffer doesn't contain { or } in the wrong place....

Does this seem useful? I'm personally working on a template system and would find such a function very helpful. Not sure where to start if I was going to implement it - I downloaded the 1.9.2 source code but couldn't really find out where I'd add the code.

Kind regards,
Samuel