RFC: Adding support for an API-"since"-version-attribute to Haddock?

Greg Weber greg at gregweber.info
Tue Sep 4 16:11:37 CEST 2012

a lot of packages are doing this already, would be nice to formalize it

On Tue, Sep 4, 2012 at 3:56 AM, Herbert Valerio Riedel <hvr at gnu.org> wrote:
> Hello Haskellers,
> I've been wondering whether it might be useful to add a feature to
> Haddock similar to what can be found in other API documentation systems,
> specifically an optional parseable "since"-attribute, declaring the last
> package version when the associated definition/symbol was introduced or
> its semantics modified.
> Beyond giving a uniform/standard representation for this kind of
> information (e.g. if Haddock would render this information in a
> distinctive style suitable to give a visual hint for locating this
> information easily), this information could be used to generate an
> automated changelog entry (at least for the current package version),
> listing all definitions added or modified with the current version.
> Another application I could thinkg of would be to find the lowest
> version of a package supporting the currently used API from it (given
> the currently known-to-work package-version and a list of currently used
> symbols from that package).
> Would such an enhancement to Haddock be worthwhile or is it a bad idea?
> Has such a proposal come up in the past already? Are there alternative
> approaches to consider?
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