public boolean equiv(final Type other, final EquivState state) {
final Type otherDeref = other.deref();
if (otherDeref instanceof TypeParam) {
final TypeParam otherParam = (TypeParam) otherDeref;
return state.matchParam(this, otherParam);
}
return false;
}
public boolean equiv(final Type other, final EquivState state) {
if (state.checkVisited(this, other)) return true;
if (isAbsApply()) {
return eval().equiv(other, state);
}
final Type otherEval = other.deref().eval();
if (otherEval instanceof TypeApp) {
final TypeApp otherApp = (TypeApp) otherEval;
return base.equiv(otherApp.base, state) && arg.equiv(otherApp.arg, state);
}
return false;
}