> I would be cautious about using the ghc-api hi file interfaces; hi files turn out to interact with a > lot of low-level parts in complex ways (even to the extent that they're a large part of why ghc > can't parallelize builds itself and attempts to change that have mostly failed).
Are you cautioning against using the GHC API (as opposed to the --show-iface command line interface) or using HI files themselves? -- Saurabh. On Sun, Dec 3, 2017 at 2:04 AM, Brandon Allbery <allber...@gmail.com> wrote: > I would be cautious about using the ghc-api hi file interfaces; hi files > turn out to interact with a lot of low-level parts in complex ways (even to > the extent that they're a large part of why ghc can't parallelize builds > itself and attempts to change that have mostly failed). > > But if you must do this, you *really* want to have > https://ghc.haskell.org/trac/ghc/wiki/Commentary/Compiler ready to hand > --- and go through it first so you have some idea of how it works; much of > it is links to the lower level details (often straight into the source). > > On Sat, Dec 2, 2017 at 10:59 AM, Saurabh Nanda <saurabhna...@gmail.com> > wrote: > >> (GHC newbie alert -- is this the right mailing list for these kind of >> questions?) >> >> I"m writing some code to figure out all the instances of particular >> type-classes and after exploring a lot of options (hlint, haskell-src-exts, >> annotations, doctests, etc), I realized that the compiler had already >> figured it out and written it to disk for me! >> >> More digging led me to https://www.stackage.org/haddo >> ck/lts-9.0/ghc-8.0.2/LoadIface.html#v:loadSrcInterface after which I got >> stuck. How does one call this function? Specifically: >> >> * What is SDoc and how to construct a reasonable value for this argument? >> * IsBootInterface would mostly be False, right? >> * What does `Maybe FastString` represent and how does one construct it? >> * Finally how does one evaluate the resulting monadic action to get >> access to the underlying `ModIface`? >> >> -- Saurabh. >> >> >> _______________________________________________ >> ghc-devs mailing list >> ghc-devs@haskell.org >> http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs >> >> > > > -- > brandon s allbery kf8nh sine nomine > associates > allber...@gmail.com > ballb...@sinenomine.net > unix, openafs, kerberos, infrastructure, xmonad > http://sinenomine.net > -- http://www.saurabhnanda.com
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