As you acknowledge, these three interfaces can be implemented using eachother.

I did not acknowledge that--I flat out contradicted it.

Neither of the other two interfaces can be easily wrapped to provide each other, nor that which I described.

And I'm not sure how you came to that reading from my post?

Nobody is suggesting that the OP should make one and only one interface available, except you (unless I am misunderstanding your position).

You are not misunderstanding my position. I think that a single flexible interface is prefereable to multiple overlapping interfaces. Adding bloat to a module is detrimental rather than value-add IMO.

If there are common usage scenarios that would benefit from a simpler interface, these should be provided through a separate package that wraps the flexible interface in the same way that LWP::Simple wrap LWP::Useragent and XML::Simple wraps either XML::Parser or XML::SAX.

I'm not into deeply nested hierachies, but two levels strikes a good balance between depth and breadth at all levels.

  • It allows the segregation of the code for both maintenance and use.
  • It allows the *::Simple documentation to be exactly that, rather than mixing it up with the complexities of the full interface.
  • The *::Simple module becomes an excellent "API design" test, and long-term regression test for the primary module.
  • It also serves as a "worked example" of both using the primary module and extending it.
    Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
    Lingua non convalesco, consenesco et abolesco.
    Rule 1 has a caveat! -- Who broke the cabal?

    In reply to Re^5: Should Modules Do I/O? by BrowserUk
    in thread Should Modules Do I/O? by pboin

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