diff options
Diffstat (limited to 'typing.cpp')
| -rw-r--r-- | typing.cpp | 6 |
1 files changed, 3 insertions, 3 deletions
@@ -152,7 +152,7 @@ ACarCall::constrain(TEnv& tenv) const { if (size() != 2) throw Error("`car' requires exactly 1 argument", loc); at(1)->constrain(tenv); - AType* carT = tenv.var(loc); + AType* carT = tenv.type(this); AType* pairT = new AType(at(1)->loc, tenv.penv.sym("Pair"), carT, tenv.var(), 0); tenv.constrain(at(1), pairT); tenv.constrain(this, carT); @@ -163,7 +163,7 @@ ACdrCall::constrain(TEnv& tenv) const { if (size() != 2) throw Error("`cdr' requires exactly 1 argument", loc); at(1)->constrain(tenv); - AType* cdrT = tenv.var(loc); + AType* cdrT = tenv.type(this); AType* pairT = new AType(at(1)->loc, tenv.penv.sym("Pair"), tenv.var(), cdrT, 0); tenv.constrain(at(1), pairT); tenv.constrain(this, cdrT); @@ -240,7 +240,7 @@ TEnv::unify(const Constraints& constraints) // TAPL 22.4 return unify(cp); } else { throw Error((format("type is `%1%' but should be `%2%'") % s->str() % t->str()).str(), - constraints.begin()->loc); + s->loc ? s->loc : t->loc); } } |