[project @ 2005-05-20 11:32:03 by simonpj]
Liberalise the defaulting rules for GHCi Merge to STABLE? The H98 defaulting rules are these. Group constraints of the form (C v), for some particular type variable v. Then default v if a) v appears only in this group (no implicit params or D [v]) b) at least one of the C's is numeric c) all the C's are standard GHCi changed rules (b) to (b') at least one of the C's is numeric, or Eq,Ord,Show This commit further liberalises GHCi to change (c): (c') any of the C's are standard Otherwise the existence of a non-standard class (e.g. Random) is enough to kill defaulting altogether.