2 import IR.Tree.Modifiers;
3 import IR.Tree.ExpressionNode;
4 import java.util.Vector;
9 * represents a symbol in the language (var name, function name, etc).
12 public class MethodDescriptor extends Descriptor {
14 protected Modifiers modifier;
15 protected TypeDescriptor returntype;
16 protected String identifier;
17 protected Vector params;
18 protected SymbolTable paramtable;
19 protected ClassDescriptor cd;
20 protected VarDescriptor thisvd;
21 protected boolean isglobal;
23 public MethodDescriptor(Modifiers m, TypeDescriptor rt, String identifier) {
27 this.identifier=identifier;
28 this.safename = "___" + name + "___";
29 this.uniqueid=count++;
31 paramtable=new SymbolTable();
35 public Modifiers getModifiers() {
39 public boolean matches(MethodDescriptor md) {
41 if (!identifier.equals(md.identifier))
43 if (numParameters()!=md.numParameters())
45 for(int i=0;i<numParameters();i++) {
46 Descriptor d1=getParameter(i);
47 Descriptor d2=md.getParameter(i);
48 TypeDescriptor td1=(d1 instanceof TagVarDescriptor)?((TagVarDescriptor)d1).getType():((VarDescriptor)d1).getType();
49 TypeDescriptor td2=(d2 instanceof TagVarDescriptor)?((TagVarDescriptor)d2).getType():((VarDescriptor)d2).getType();
56 public MethodDescriptor(Modifiers m, String identifier) {
57 this(m, identifier, false);
60 public MethodDescriptor(Modifiers m, String identifier, boolean isglobal) {
62 this.isglobal=isglobal;
65 this.identifier=identifier;
66 this.safename = "___" + name + "___";
67 this.uniqueid=count++;
69 paramtable=new SymbolTable();
73 public void setThis(VarDescriptor vd) {
78 public VarDescriptor getThis() {
82 public String getSafeMethodDescriptor() {
84 for(int i=0;i<numParameters();i++) {
85 st+=getParamType(i).getSafeDescriptor();
86 if ((i+1)<numParameters())
92 public boolean isStatic() {
93 return modifier.isStatic();
96 public boolean isConstructor() {
97 return (returntype==null);
100 public TypeDescriptor getReturnType() {
104 public void setClassDesc(ClassDescriptor cd) {
108 public ClassDescriptor getClassDesc() {
112 public SymbolTable getParameterTable() {
116 public void addParameter(TypeDescriptor type, String paramname) {
117 if (paramname.equals("this"))
118 throw new Error("Can't have parameter named this");
119 VarDescriptor vd=new VarDescriptor(type, paramname);
122 if (paramtable.getFromSameScope(paramname)!=null) {
123 throw new Error("Parameter "+paramname+" already defined");
128 public void addTagParameter(TypeDescriptor type, String paramname) {
129 if (paramname.equals("this"))
130 throw new Error("Can't have parameter named this");
131 TagVarDescriptor vd=new TagVarDescriptor(null, paramname);
134 if (paramtable.getFromSameScope(paramname)!=null) {
135 throw new Error("Parameter "+paramname+" already defined");
140 public int numParameters() {
141 return params.size();
144 public Descriptor getParameter(int i) {
145 return (Descriptor) params.get(i);
148 public String getParamName(int i) {
149 return ((Descriptor)params.get(i)).getSymbol();
152 public TypeDescriptor getParamType(int i) {
153 Descriptor d=(Descriptor)params.get(i);
154 if (d instanceof VarDescriptor)
155 return ((VarDescriptor)params.get(i)).getType();
156 else if (d instanceof TagVarDescriptor)
157 return new TypeDescriptor(TypeDescriptor.TAG);
158 else throw new Error();
161 public String toString() {
166 if (returntype!=null)
167 st=modifier.toString()+returntype.toString()+" "+type+identifier+"(";
169 st=modifier.toString()+" "+type+identifier+"(";
170 for(int i=0;i<params.size();i++) {
171 st+=getParamType(i)+" "+getParamName(i);
172 if ((i+1)!=params.size())