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freebsd-ports/devel/hs-DrIFT/pkg-descr
2015-09-20 19:59:03 +00:00

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DrIFT is a type sensitive preprocessor for Haskell. It extracts type
declarations and directives from modules. The directives cause rules to
be fired on the parsed type declarations, generating new code which is
then appended to the bottom of the input file. The rules are expressed
as Haskell code, and it is intended that the user can add new rules as
required. DrIFT automates instance derivation for classes that aren't
supported by the standard compilers. In addition, instances can be
produced in separate modules to that containing the type declaration.
This allows instances to be derived for a type after the original module
has been compiled. As a bonus, simple utility functions can also be
produced from a type.
WWW: http://repetae.net/computer/haskell/DrIFT/