interpreter

CS 342 Principles of Programming Languages Homework 5 Homework Solutions: FuncLang (Part II) Learning Objectives: 1. Functional programming 2. Understand and expand FuncLang interpreter Instructions: • Total points: 54 pt • Early deadline: Mar 24 (Wed) at 11:59 PM; Regular deadline: Mar 26 (Fri) at 11:59 PM (you can continue working on the homework till

CS 342 Principles of Programming Languages Homework 8 Learning Objectives: Homework: TypeLang 1. Understanding, writing, and implementing typing rules 2. TypeLang programming Instructions: • Total points 66 pt • Early deadline: Apr 14 (Wed) at 11:59 PM; Regular deadline: Apr 16 (Fri) at 11:59 PM (or till TAs start grading the homework) • Download hw8code.zip

// Generated from typelang\parser\TypeLang.g by ANTLR 4.5 package typelang.parser; import static typelang.AST.*; import typelang.*; import typelang.Type.*; import org.antlr.v4.runtime.atn.*; import org.antlr.v4.runtime.dfa.DFA; import org.antlr.v4.runtime.*; import org.antlr.v4.runtime.misc.*; import org.antlr.v4.runtime.tree.*; import java.util.List; import java.util.Iterator; import java.util.ArrayList; @SuppressWarnings({“all”, “warnings”, “unchecked”, “unused”, “cast”}) public class TypeLangParser extends Parser { static { RuntimeMetaData.checkVersion(“4.5”, RuntimeMetaData.VERSION); } protected static final DFA[] _decisionToDFA; protected static

package typelang; import java.util.ArrayList; import java.util.List; import typelang.Type; /** * This class hierarchy represents expressions in the abstract syntax tree * manipulated by this interpreter. * * @author hridesh * */ @SuppressWarnings({“rawtypes”, “unchecked”}) public interface AST { public static abstract class ASTNode implements AST { public abstract Object accept(Visitor visitor, Object env); } public static