Re: Should the PVP be changed with regards to instances?

On Wed, 21 Dec 2011, John Lato wrote:

On Wed, Dec 21, 2011 at 11:16 AM, Henning Thielemann wrote:

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On Wed, 21 Dec 2011, John Lato wrote:

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I'm in the same situation, however I'm quite hesitant to add new instances in a minor version.  Adding new dependencies can cause breakage even without orphan instances, if downstream packages import a different version of that dependency already.

The proposal was about adding type class instances, not about adding package dependencies.

IME, new type class instances usually arise only because of new package dependencies or a major version bump to an existing dependency, either of which would currently require a major bump.

Adding a package dependency does not require a minor version bump. Increasing the imported version of a package dependency only requires a version bump if that changes the API. Thus I do not see a closer connection between adding instances and modifying package dependencies.