I want to write a small patch to String class for my test environment that will warn for usage of double quotes without interpolation ( #{foo} ). Is there a way to resolve if a string has derived from interpolation? If yes, is there a way to retrieve the original un-interpolated value?

Retrieve original string prior to interpolation

I want to write a small patch to String class for my test environment that will warn for usage of double quotes without interpolation (#{foo}).