X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=Robust%2Fsrc%2FIR%2FTree%2FBuildIR.java;h=b692207fd31114af6cc0a0faec656de35b92f037;hb=cdcf09c40af1419fa42932aae249cb79b69b5daf;hp=e5292e64c756d895ba95d1ff186878a64a78c740;hpb=98c5e186f07e2f0b8444ee594afa690a0e74e36e;p=IRC.git

diff --git a/Robust/src/IR/Tree/BuildIR.java b/Robust/src/IR/Tree/BuildIR.java
deleted file mode 100644
index e5292e64..00000000
--- a/Robust/src/IR/Tree/BuildIR.java
+++ /dev/null
@@ -1,621 +0,0 @@
-package IR.Tree;
-import IR.*;
-import java.util.*;
-
-
-public class BuildIR {
-    State state;
-    public BuildIR(State state) {
-	this.state=state;
-    }
-    public void buildtree() {
-	for(Iterator it=state.parsetrees.iterator();it.hasNext();) {
-	    ParseNode pn=(ParseNode)it.next();
-	    parseFile(pn);
-	}
-    }
-
-    /** Parse the classes in this file */
-    public void parseFile(ParseNode pn) {
-	ParseNode tpn=pn.getChild("type_declaration_list");
-	if (tpn!=null) {
-	    ParseNodeVector pnv=tpn.getChildren();
-	    for(int i=0;i<pnv.size();i++) {
-		ParseNode type_pn=pnv.elementAt(i);
-		if (isEmpty(type_pn)) /* Skip the semicolon */
-		    continue;
-		if (isNode(type_pn,"class_declaration")) {
-		    ClassDescriptor cn=parseTypeDecl(type_pn);
-		    state.addClass(cn);
-		} else if (isNode(type_pn,"task_declaration")) {
-		    TaskDescriptor td=parseTaskDecl(type_pn);
-		    state.addTask(td);
-		} else {
-		    throw new Error(type_pn.getLabel());
-		}
-	    }
-	}
-    }
-
-    public TaskDescriptor parseTaskDecl(ParseNode pn) {
-	TaskDescriptor td=new TaskDescriptor(pn.getChild("name").getTerminal());
-	ParseNode bodyn=pn.getChild("body");
-	BlockNode bn=parseBlock(bodyn);
-	parseParameterList(td, pn);
-	state.addTreeCode(td,bn);
-	if (pn.getChild("flag_effects_list")!=null)
-	    td.addFlagEffects(parseFlags(pn.getChild("flag_effects_list")));
-	return td;
-    }
-
-    public Vector parseFlags(ParseNode pn) {
-	Vector vfe=new Vector();
-	ParseNodeVector pnv=pn.getChildren();
-	for(int i=0;i<pnv.size();i++) {
-	    ParseNode fn=pnv.elementAt(i);
-	    FlagEffects fe=parseFlagEffects(fn);
-	    vfe.add(fe);
-	}
-	return vfe;
-    }
-
-    public FlagEffects parseFlagEffects(ParseNode pn) {
-	if (isNode(pn,"flag_effect")) {
-	    String flagname=pn.getChild("name").getTerminal();
-	    FlagEffects fe=new FlagEffects(flagname);
-	    parseFlagEffect(fe, pn.getChild("flag_list"));
-	    return fe;
-	} else throw new Error();
-    }
-
-    public void parseFlagEffect(FlagEffects fes, ParseNode pn) {
-	ParseNodeVector pnv=pn.getChildren();
-	for(int i=0;i<pnv.size();i++) {
-	    boolean status=true;
-	    if (pn.getChild("not")!=null) {
-		status=false;
-		pn=pn.getChild("not");
-	    }
-	    String name=pn.getChild("name").getTerminal();
-	    fes.addEffect(new FlagEffect(name,status));
-	}
-    }
-
-    public FlagExpressionNode parseFlagExpression(ParseNode pn) {
-	if (pn.getChild("or")!=null) {
-	    ParseNodeVector pnv=pn.getChild("or").getChildren();
-	    ParseNode left=pnv.elementAt(0);
-	    ParseNode right=pnv.elementAt(1);
-	    return new FlagOpNode(parseFlagExpression(left), parseFlagExpression(right), new Operation(Operation.LOGIC_OR));
-	} else if (pn.getChild("and")!=null) {
-	    ParseNodeVector pnv=pn.getChild("and").getChildren();
-	    ParseNode left=pnv.elementAt(0);
-	    ParseNode right=pnv.elementAt(1);
-	    return new FlagOpNode(parseFlagExpression(left), parseFlagExpression(right), new Operation(Operation.LOGIC_AND));
-	} else if (pn.getChild("not")!=null) {
-	    ParseNodeVector pnv=pn.getChild("not").getChildren();
-	    ParseNode left=pnv.elementAt(0);
-	    return new FlagOpNode(parseFlagExpression(left), new Operation(Operation.LOGIC_NOT));	    
-
-	} else if (pn.getChild("name")!=null) {
-	    return new FlagNode(pn.getChild("name").getTerminal());
-	} else throw new Error();
-    }
-
-    public void parseParameterList(TaskDescriptor td, ParseNode pn) {
-	ParseNode paramlist=pn.getChild("task_parameter_list");
-	if (paramlist==null)
-	    return;
-	 ParseNodeVector pnv=paramlist.getChildren();
-	 for(int i=0;i<pnv.size();i++) {
-	     ParseNode paramn=pnv.elementAt(i);
-	     TypeDescriptor type=parseTypeDescriptor(paramn);
-
-	     ParseNode tmp=paramn;
-	     while (tmp.getChild("single")==null) {
-		 type=type.makeArray(state);
-		 tmp=tmp.getChild("array");
-	     }
-	     String paramname=tmp.getChild("single").getTerminal();
-	     FlagExpressionNode fen=parseFlagExpression(paramn.getChild("flag"));
-	     
-	     td.addParameter(type,paramname,fen);
-	 }
-    }
-
-    public ClassDescriptor parseTypeDecl(ParseNode pn) {
-	ClassDescriptor cn=new ClassDescriptor(pn.getChild("name").getTerminal());
-	if (!isEmpty(pn.getChild("super").getTerminal())) {
-	    /* parse superclass name */
-	    ParseNode snn=pn.getChild("super").getChild("type").getChild("class").getChild("name");
-	    NameDescriptor nd=parseName(snn);
-	    cn.setSuper(nd.toString());
-	} else {
-	    if (!cn.getSymbol().equals(TypeUtil.ObjectClass))
-		cn.setSuper(TypeUtil.ObjectClass);
-	}
-	cn.setModifiers(parseModifiersList(pn.getChild("modifiers")));
-	parseClassBody(cn, pn.getChild("classbody"));
-	return cn;
-    }
-
-    private void parseClassBody(ClassDescriptor cn, ParseNode pn) {
-	ParseNode decls=pn.getChild("class_body_declaration_list");
-	if (decls!=null) {
-	    ParseNodeVector pnv=decls.getChildren();
-	    for(int i=0;i<pnv.size();i++) {
-		ParseNode decl=pnv.elementAt(i);
-		if (isNode(decl,"member")) {
-		    parseClassMember(cn,decl);
-		} else if (isNode(decl,"constructor")) {
-		    parseConstructorDecl(cn,decl.getChild("constructor_declaration"));
-		} else if (isNode(decl,"block")) {
-		} else throw new Error();
-	    }
-	}
-    }
-
-    private void parseClassMember(ClassDescriptor cn, ParseNode pn) {
-	ParseNode fieldnode=pn.getChild("field");
-
-	if (fieldnode!=null) {
-	    parseFieldDecl(cn,fieldnode.getChild("field_declaration"));
-	    return;
-	}
-	ParseNode methodnode=pn.getChild("method");
-	if (methodnode!=null) {
-	    parseMethodDecl(cn,methodnode.getChild("method_declaration"));
-	    return;
-	}
-	ParseNode flagnode=pn.getChild("flag");
-	if (flagnode!=null) {
-	    parseFlagDecl(cn, flagnode.getChild("flag_declaration"));
-	}
-	throw new Error();
-    }
-
-    private TypeDescriptor parseTypeDescriptor(ParseNode pn) {
-	ParseNode tn=pn.getChild("type");
-
-	String type_st=tn.getTerminal();
-	if(type_st.equals("byte")) {
-	    return state.getTypeDescriptor(TypeDescriptor.BYTE);
-	} else if(type_st.equals("short")) {
-	    return state.getTypeDescriptor(TypeDescriptor.SHORT);
-	} else if(type_st.equals("boolean")) {
-	    return state.getTypeDescriptor(TypeDescriptor.BOOLEAN);
-	} else if(type_st.equals("int")) {
-	    return state.getTypeDescriptor(TypeDescriptor.INT);
-	} else if(type_st.equals("long")) {
-	    return state.getTypeDescriptor(TypeDescriptor.LONG);
-	} else if(type_st.equals("char")) {
-	    return state.getTypeDescriptor(TypeDescriptor.CHAR);
-	} else if(type_st.equals("float")) {
-	    return state.getTypeDescriptor(TypeDescriptor.FLOAT);
-	} else if(type_st.equals("double")) {
-	    return state.getTypeDescriptor(TypeDescriptor.DOUBLE);
-	} else if(type_st.equals("class")) {
-	    ParseNode nn=tn.getChild("class");
-	    return state.getTypeDescriptor(parseName(nn.getChild("name")));
-	} else if(type_st.equals("array")) {
-	    ParseNode nn=tn.getChild("array");
-	    TypeDescriptor td=parseTypeDescriptor(nn.getChild("basetype"));
-	    Integer numdims=(Integer)nn.getChild("dims").getLiteral();
-	    for(int i=0;i<numdims.intValue();i++)
-		td=td.makeArray(state);
-	    return td;
-	} else {
-	    throw new Error();
-	}
-    }
-
-    private NameDescriptor parseName(ParseNode nn) {
-	ParseNode base=nn.getChild("base");
-	ParseNode id=nn.getChild("identifier");
-	if (base==null)
-	    return new NameDescriptor(id.getTerminal());
-	return new NameDescriptor(parseName(base.getChild("name")),id.getTerminal());
-	
-    }
-
-    private void parseFlagDecl(ClassDescriptor cn,ParseNode pn) {
-	String name=pn.getChild("name").getTerminal();
-	cn.addFlag(new FlagDescriptor(name));
-    }
-
-    private void parseFieldDecl(ClassDescriptor cn,ParseNode pn) {
-	ParseNode mn=pn.getChild("modifier");
-	Modifiers m=parseModifiersList(mn);
-
-	ParseNode tn=pn.getChild("type");
-	TypeDescriptor t=parseTypeDescriptor(tn);
-	ParseNode vn=pn.getChild("variables").getChild("variable_declarators_list");
-	ParseNodeVector pnv=vn.getChildren();
-	for(int i=0;i<pnv.size();i++) {
-	    ParseNode vardecl=pnv.elementAt(i);
-
-	    
-	    ParseNode tmp=vardecl;
-	    TypeDescriptor arrayt=t;
-	    while (tmp.getChild("single")==null) {
-		arrayt=arrayt.makeArray(state);
-		tmp=tmp.getChild("array");
-	    }
-	    String identifier=tmp.getChild("single").getTerminal();
-
-	    ParseNode epn=vardecl.getChild("initializer");
-	    
-	    ExpressionNode en=null;
-	    if (epn!=null)
-		en=parseExpression(epn.getFirstChild());
-  
-	    cn.addField(new FieldDescriptor(m,arrayt,identifier, en));
-	}
-	
-    }
-
-    private ExpressionNode parseExpression(ParseNode pn) {
-	if (isNode(pn,"assignment"))
-	    return parseAssignmentExpression(pn);
-	else if (isNode(pn,"logical_or")||isNode(pn,"logical_and")||
-		 isNode(pn,"bitwise_or")||isNode(pn,"bitwise_xor")||
-		 isNode(pn,"bitwise_and")||isNode(pn,"equal")||
-		 isNode(pn,"not_equal")||isNode(pn,"comp_lt")||
-		 isNode(pn,"comp_lte")||isNode(pn,"comp_gt")||
-		 isNode(pn,"comp_gte")||isNode(pn,"leftshift")||
-		 isNode(pn,"rightshift")||isNode(pn,"sub")||
-		 isNode(pn,"add")||isNode(pn,"mult")||
-		 isNode(pn,"div")||isNode(pn,"mod")) {
-	    ParseNodeVector pnv=pn.getChildren();
-	    ParseNode left=pnv.elementAt(0);
-	    ParseNode right=pnv.elementAt(1);
-	    Operation op=new Operation(pn.getLabel());
-   	    return new OpNode(parseExpression(left),parseExpression(right),op);
-	} else if (isNode(pn,"unaryplus")||
-		   isNode(pn,"unaryminus")||
-		   isNode(pn,"postinc")||
-		   isNode(pn,"postdec")||
-		   isNode(pn,"preinc")||
-		   isNode(pn,"not")||
-		   isNode(pn,"predec")) {
-	    ParseNode left=pn.getFirstChild();
-	    Operation op=new Operation(pn.getLabel());
-   	    return new OpNode(parseExpression(left),op);
-	} else if (isNode(pn,"literal")) {
-	    String literaltype=pn.getTerminal();
-	    ParseNode literalnode=pn.getChild(literaltype);
-	    Object literal_obj=literalnode.getLiteral();
-	    return new LiteralNode(literaltype, literal_obj);
-	} else if (isNode(pn,"createobject")) {
-	    TypeDescriptor td=parseTypeDescriptor(pn);
-	    Vector args=parseArgumentList(pn);
-	    CreateObjectNode con=new CreateObjectNode(td);
-	    for(int i=0;i<args.size();i++) {
-		con.addArgument((ExpressionNode)args.get(i));
-	    }
-	    /* Could have flag set here */
-	    if (pn.getChild("flag_list")!=null) {
-		FlagEffects fe=new FlagEffects(null);
-		parseFlagEffect(fe, pn.getChild("flag_list"));
-		con.addFlagEffects(fe);
-	    }
-	    return con;
-	} else if (isNode(pn,"createarray")) {
-	    System.out.println(pn.PPrint(3,true));
-	    TypeDescriptor td=parseTypeDescriptor(pn);
-	    Vector args=parseDimExprs(pn);
-	    int num=0;
-	    if (pn.getChild("dims_opt").getLiteral()!=null)
-		num=((Integer)pn.getChild("dims_opt").getLiteral()).intValue();
-	    for(int i=0;i<(args.size()+num);i++)
-		td=td.makeArray(state);
-	    CreateObjectNode con=new CreateObjectNode(td);
-	    for(int i=0;i<args.size();i++) {
-		con.addArgument((ExpressionNode)args.get(i));
-	    }
-	    return con;
-	} else if (isNode(pn,"name")) {
-	    NameDescriptor nd=parseName(pn);
-	    return new NameNode(nd);
-	} else if (isNode(pn,"this")) {
-	    NameDescriptor nd=new NameDescriptor("this");
-	    return new NameNode(nd);
-	} else if (isNode(pn,"methodinvoke1")) {
-	    NameDescriptor nd=parseName(pn.getChild("name"));
-	    Vector args=parseArgumentList(pn);
-	    MethodInvokeNode min=new MethodInvokeNode(nd);
-	    for(int i=0;i<args.size();i++) {
-		min.addArgument((ExpressionNode)args.get(i));
-	    }
-	    return min;
-	} else if (isNode(pn,"methodinvoke2")) {
-	    String methodid=pn.getChild("id").getTerminal();
-	    ExpressionNode exp=parseExpression(pn.getChild("base").getFirstChild());
-	    Vector args=parseArgumentList(pn);
-	    MethodInvokeNode min=new MethodInvokeNode(methodid,exp);
-	    for(int i=0;i<args.size();i++) {
-		min.addArgument((ExpressionNode)args.get(i));
-	    }
-	    return min;
-	} else if (isNode(pn,"fieldaccess")) { 
-	    ExpressionNode en=parseExpression(pn.getChild("base").getFirstChild());	    String fieldname=pn.getChild("field").getTerminal();
-	    return new FieldAccessNode(en,fieldname);
-	} else if (isNode(pn,"arrayaccess")) { 
-	    ExpressionNode en=parseExpression(pn.getChild("base").getFirstChild());
-	    ExpressionNode index=parseExpression(pn.getChild("index").getFirstChild());
-	    return new ArrayAccessNode(en,index);
-	} else if (isNode(pn,"cast1")) { 
-	    return new CastNode(parseTypeDescriptor(pn.getChild("type")),parseExpression(pn.getChild("exp").getFirstChild()));
-	} else if (isNode(pn,"cast2")) { 
-	    return new CastNode(parseExpression(pn.getChild("type").getFirstChild()),parseExpression(pn.getChild("exp").getFirstChild()));
-	} else {
-	    System.out.println("---------------------");
-	    System.out.println(pn.PPrint(3,true));
-	    throw new Error();
-	}
-    }
-
-    private Vector parseDimExprs(ParseNode pn) {
-	Vector arglist=new Vector();
-	ParseNode an=pn.getChild("dim_exprs");
-	if (an==null)   /* No argument list */
-	    return arglist;
-	ParseNodeVector anv=an.getChildren();
-	for(int i=0;i<anv.size();i++) {
-	    arglist.add(parseExpression(anv.elementAt(i)));
-	}
-	return arglist;
-    }
-
-    private Vector parseArgumentList(ParseNode pn) {
-	Vector arglist=new Vector();
-	ParseNode an=pn.getChild("argument_list");
-	if (an==null)   /* No argument list */
-	    return arglist;
-	ParseNodeVector anv=an.getChildren();
-	for(int i=0;i<anv.size();i++) {
-	    arglist.add(parseExpression(anv.elementAt(i)));
-	}
-	return arglist;
-    }
-
-    private ExpressionNode parseAssignmentExpression(ParseNode pn) {
-	AssignOperation ao=new AssignOperation(pn.getChild("op").getTerminal());
-	ParseNodeVector pnv=pn.getChild("args").getChildren();
-	
-	AssignmentNode an=new AssignmentNode(parseExpression(pnv.elementAt(0)),parseExpression(pnv.elementAt(1)),ao);
-	return an;
-    }
-
-
-    private void parseMethodDecl(ClassDescriptor cn, ParseNode pn) {
-	ParseNode headern=pn.getChild("method_header");
-	ParseNode bodyn=pn.getChild("body");
-	MethodDescriptor md=parseMethodHeader(headern);
-	BlockNode bn=parseBlock(bodyn);
-	cn.addMethod(md);
-	state.addTreeCode(md,bn);
-    }
-
-    private void parseConstructorDecl(ClassDescriptor cn, ParseNode pn) {
-	ParseNode mn=pn.getChild("modifiers");
-	Modifiers m=parseModifiersList(mn);
-	ParseNode cdecl=pn.getChild("constructor_declarator");
-	String name=cdecl.getChild("name").getChild("identifier").getTerminal();
-	MethodDescriptor md=new MethodDescriptor(m, name);
-	ParseNode paramnode=cdecl.getChild("parameters");
-	parseParameterList(md,paramnode);
-	ParseNode bodyn0=pn.getChild("body");
-	ParseNode bodyn=bodyn0.getChild("constructor_body");
-	cn.addMethod(md);
-	if (bodyn!=null) {
-	    BlockNode bn=parseBlock(bodyn);
-	    state.addTreeCode(md,bn);
-	}
-    }
-
-    public BlockNode parseBlock(ParseNode pn) {
-	if (isEmpty(pn.getTerminal()))
-	    return new BlockNode();
-	ParseNode bsn=pn.getChild("block_statement_list");
-	return parseBlockHelper(bsn);
-    }
-    
-    private BlockNode parseBlockHelper(ParseNode pn) {
-	ParseNodeVector pnv=pn.getChildren();
-	BlockNode bn=new BlockNode();
-	for(int i=0;i<pnv.size();i++) {
-	    Vector bsv=parseBlockStatement(pnv.elementAt(i));
-	    for(int j=0;j<bsv.size();j++) {
-		bn.addBlockStatement((BlockStatementNode)bsv.get(j));
-	    }
-	}
-	return bn;
-    }
-
-    public BlockNode parseSingleBlock(ParseNode pn) {
-	BlockNode bn=new BlockNode();
-	Vector bsv=parseBlockStatement(pn);
-	for(int j=0;j<bsv.size();j++) {
-	    bn.addBlockStatement((BlockStatementNode)bsv.get(j));
-	}
-	bn.setStyle(BlockNode.NOBRACES);
-	return bn;
-    }
-
-    public Vector parseBlockStatement(ParseNode pn) {
-	Vector blockstatements=new Vector();
-	if (isNode(pn,"local_variable_declaration")) {
-	    TypeDescriptor t=parseTypeDescriptor(pn);
-	    ParseNode vn=pn.getChild("variable_declarators_list");
-	    ParseNodeVector pnv=vn.getChildren();
-	    for(int i=0;i<pnv.size();i++) {
-		ParseNode vardecl=pnv.elementAt(i);
-
-	    
-		ParseNode tmp=vardecl;
-		TypeDescriptor arrayt=t;
-		while (tmp.getChild("single")==null) {
-		    arrayt=arrayt.makeArray(state);
-		    tmp=tmp.getChild("array");
-		}
-		String identifier=tmp.getChild("single").getTerminal();
-		
-		ParseNode epn=vardecl.getChild("initializer");
-	    
-
-		ExpressionNode en=null;
-		if (epn!=null)
-		    en=parseExpression(epn.getFirstChild());
-		
-		blockstatements.add(new DeclarationNode(new VarDescriptor(arrayt, identifier),en));
-	    }
-	} else if (isNode(pn,"nop")) {
-	    /* Do Nothing */
-	} else if (isNode(pn,"expression")) {
-	    blockstatements.add(new BlockExpressionNode(parseExpression(pn.getFirstChild())));
-	} else if (isNode(pn,"ifstatement")) {
-	    blockstatements.add(new IfStatementNode(parseExpression(pn.getChild("condition").getFirstChild()),
-				       parseSingleBlock(pn.getChild("statement").getFirstChild()),
-				       pn.getChild("else_statement")!=null?parseSingleBlock(pn.getChild("else_statement").getFirstChild()):null));
-	} else if (isNode(pn,"taskexit")) {
-	    Vector vfe=null;
-	    if (pn.getChild("flag_effects_list")!=null)
-		vfe=parseFlags(pn.getChild("flag_effects_list"));
-	    blockstatements.add(new TaskExitNode(vfe));
-	} else if (isNode(pn,"return")) {
-	    if (isEmpty(pn.getTerminal()))
-		blockstatements.add(new ReturnNode());
-	    else {
-		ExpressionNode en=parseExpression(pn.getFirstChild());
-		blockstatements.add(new ReturnNode(en));
-	    }
-	} else if (isNode(pn,"block_statement_list")) {
-	    BlockNode bn=parseBlockHelper(pn);
-	    blockstatements.add(new SubBlockNode(bn));
-	} else if (isNode(pn,"empty")) {
-	    /* nop */
-	} else if (isNode(pn,"statement_expression_list")) {
-	    ParseNodeVector pnv=pn.getChildren();
-	    BlockNode bn=new BlockNode();
-	    for(int i=0;i<pnv.size();i++) {
-		ExpressionNode en=parseExpression(pnv.elementAt(i));
-		blockstatements.add(new BlockExpressionNode(en));
-	    }
-	    bn.setStyle(BlockNode.EXPRLIST);
-	} else if (isNode(pn,"forstatement")) {
-	    BlockNode init=parseSingleBlock(pn.getChild("initializer").getFirstChild());
-	    BlockNode update=parseSingleBlock(pn.getChild("update").getFirstChild());
-	    ExpressionNode condition=parseExpression(pn.getChild("condition").getFirstChild());
-	    BlockNode body=parseSingleBlock(pn.getChild("statement").getFirstChild());
-	    blockstatements.add(new LoopNode(init,condition,update,body));
-	} else if (isNode(pn,"whilestatement")) {
-	    ExpressionNode condition=parseExpression(pn.getChild("condition").getFirstChild());
-	    BlockNode body=parseSingleBlock(pn.getChild("statement").getFirstChild());
-	    blockstatements.add(new LoopNode(condition,body,LoopNode.WHILELOOP));
-	} else if (isNode(pn,"dowhilestatement")) {
-	    ExpressionNode condition=parseExpression(pn.getChild("condition").getFirstChild());
-	    BlockNode body=parseSingleBlock(pn.getChild("statement").getFirstChild());
-	    blockstatements.add(new LoopNode(condition,body,LoopNode.DOWHILELOOP));
-   	} else {
-	    System.out.println("---------------");
-	    System.out.println(pn.PPrint(3,true));
-	    throw new Error();
-	}
-	return blockstatements;
-    }
-
-    public MethodDescriptor parseMethodHeader(ParseNode pn) {
-	ParseNode mn=pn.getChild("modifiers");
-	Modifiers m=parseModifiersList(mn);
-	
-	ParseNode tn=pn.getChild("returntype");
-	TypeDescriptor returntype;
-	if (tn!=null) 
-	    returntype=parseTypeDescriptor(tn);
-	else
-	    returntype=new TypeDescriptor(TypeDescriptor.VOID);
-
-	ParseNode pmd=pn.getChild("method_declarator");
-	String name=pmd.getChild("name").getTerminal();
-	MethodDescriptor md=new MethodDescriptor(m, returntype, name);
-       
-	ParseNode paramnode=pmd.getChild("parameters");
-	parseParameterList(md,paramnode);
-	return md;
-    }
-
-    public void parseParameterList(MethodDescriptor md, ParseNode pn) {
-	ParseNode paramlist=pn.getChild("formal_parameter_list");
-	if (paramlist==null)
-	    return;
-	 ParseNodeVector pnv=paramlist.getChildren();
-	 for(int i=0;i<pnv.size();i++) {
-	     ParseNode paramn=pnv.elementAt(i);
-	     TypeDescriptor type=parseTypeDescriptor(paramn);
-
-	     ParseNode tmp=paramn;
-	     while (tmp.getChild("single")==null) {
-		 type=type.makeArray(state);
-		 tmp=tmp.getChild("array");
-	     }
-	     String paramname=tmp.getChild("single").getTerminal();
-	    
-	     md.addParameter(type,paramname);
-	 }
-    }
-
-    public Modifiers parseModifiersList(ParseNode pn) {
-	Modifiers m=new Modifiers();
-	ParseNode modlist=pn.getChild("modifier_list");
-	if (modlist!=null) {
-	    ParseNodeVector pnv=modlist.getChildren();
-	    for(int i=0;i<pnv.size();i++) {
-		ParseNode modn=pnv.elementAt(i);
-		if (isNode(modn,"public"))
-		    m.addModifier(Modifiers.PUBLIC);
-		if (isNode(modn,"protected"))
-		    m.addModifier(Modifiers.PROTECTED);
-		if (isNode(modn,"private"))
-		    m.addModifier(Modifiers.PRIVATE);
-		if (isNode(modn,"static"))
-		    m.addModifier(Modifiers.STATIC);
-		if (isNode(modn,"final"))
-		    m.addModifier(Modifiers.FINAL);
-		if (isNode(modn,"native"))
-		    m.addModifier(Modifiers.NATIVE);
-	    }
-	}
-	return m;
-    }
-
-    private boolean isNode(ParseNode pn, String label) {
-	if (pn.getLabel().equals(label))
-	    return true;
-	else return false;
-    }
-
-    private static boolean isEmpty(ParseNode pn) {
-	if (pn.getLabel().equals("empty"))
-	    return true;
-	else
-	    return false;
-    }
-
-    private static boolean isEmpty(String s) {
-	if (s.equals("empty"))
-	    return true;
-	else
-	    return false;
-    }
-
-    /** Throw an exception if something is unexpected */
-    private void check(ParseNode pn, String label) {
-        if (pn == null) {
-            throw new Error(pn+ "IE: Expected '" + label + "', got null");
-        }
-        if (! pn.getLabel().equals(label)) {
-            throw new Error(pn+ "IE: Expected '" + label + "', got '"+pn.getLabel()+"'");
-        }
-    }
-}