Commit fa3ba060 authored by niteria's avatar niteria

Expand the comment on pprVarSet

parent 57c636fc
......@@ -183,6 +183,11 @@ pluralVarSet = pluralUFM
-- shouldn't be a problem.
-- Having this function helps contain the non-determinism created with
-- varSetElems.
-- Passing a list to the pretty-printing function allows the caller
-- to decide on the order of Vars (eg. toposort them) without them having
-- to use varSetElems at the call site. This prevents from let-binding
-- non-deterministically ordered lists and reusing them where determinism
-- matters.
pprVarSet :: ([Var] -> SDoc) -- ^ The pretty printing function to use on the
-- elements
-> VarSet -- ^ The things to be pretty printed
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