/** @see jaskell.compiler.JaskellVisitor#visit(Constructor) */
public Object visit(Constructor a) {
Type ret = a.getType();
if (ret != null) return ret;
String vname = a.getName();
ConstructorDefinition def = (ConstructorDefinition) a.lookup(vname);
if (def == null) // unknown symbol
throw new CompilerException("Unknown constructor " + vname);
ret = new TypeInstantiator(def.getType()).instance();
a.setType(ret);
return ret;
}
