+++ /dev/null
-package IR;
-import IR.Tree.Modifiers;
-import IR.Tree.ExpressionNode;
-import java.util.Vector;
-
-/**
- * Descriptor
- *
- * represents a symbol in the language (var name, function name, etc).
- */
-
-public class MethodDescriptor extends Descriptor {
-
- protected Modifiers modifier;
- protected TypeDescriptor returntype;
- protected String identifier;
- protected Vector params;
- protected SymbolTable paramtable;
- protected ClassDescriptor cd;
- protected VarDescriptor thisvd;
- protected boolean isglobal;
-
- public MethodDescriptor(Modifiers m, TypeDescriptor rt, String identifier) {
- super(identifier);
- this.modifier=m;
- this.returntype=rt;
- this.identifier=identifier;
- this.safename = "___" + name + "___";
- this.uniqueid=count++;
- params=new Vector();
- paramtable=new SymbolTable();
- thisvd=null;
- }
-
- public Modifiers getModifiers() {
- return modifier;
- }
-
- public boolean matches(MethodDescriptor md) {
- /* Check the name */
- if (!identifier.equals(md.identifier))
- return false;
- if (numParameters()!=md.numParameters())
- return false;
- for(int i=0; i<numParameters(); i++) {
- Descriptor d1=getParameter(i);
- Descriptor d2=md.getParameter(i);
- TypeDescriptor td1=(d1 instanceof TagVarDescriptor) ? ((TagVarDescriptor)d1).getType() : ((VarDescriptor)d1).getType();
- TypeDescriptor td2=(d2 instanceof TagVarDescriptor) ? ((TagVarDescriptor)d2).getType() : ((VarDescriptor)d2).getType();
- if (!td1.equals(td2))
- return false;
- }
- return true;
- }
-
- public MethodDescriptor(Modifiers m, String identifier) {
- this(m, identifier, false);
- }
-
- public MethodDescriptor(Modifiers m, String identifier, boolean isglobal) {
- super(identifier);
- this.isglobal=isglobal;
- this.modifier=m;
- this.returntype=null;
- this.identifier=identifier;
- this.safename = "___" + name + "___";
- this.uniqueid=count++;
- params=new Vector();
- paramtable=new SymbolTable();
- thisvd=null;
- }
-
-
- public boolean isGlobal() {
- return isglobal;
- }
-
- public void setThis(VarDescriptor vd) {
- thisvd=vd;
- paramtable.add(vd);
- }
-
- public VarDescriptor getThis() {
- return thisvd;
- }
-
- public String getClassMethodName() {
- return cd+"."+name;
- }
-
- public String getSafeMethodDescriptor() {
- String st="";
- for(int i=0; i<numParameters(); i++) {
- st+=getParamType(i).getSafeDescriptor();
- if ((i+1)<numParameters())
- st+="_";
- }
- return st;
- }
-
- public boolean isStatic() {
- return modifier.isStatic();
- }
-
- public boolean isConstructor() {
- return (returntype==null);
- }
-
- public TypeDescriptor getReturnType() {
- return returntype;
- }
-
- public void setClassDesc(ClassDescriptor cd) {
- this.cd=cd;
- }
-
- public ClassDescriptor getClassDesc() {
- return cd;
- }
-
- public SymbolTable getParameterTable() {
- return paramtable;
- }
-
- public void addParameter(TypeDescriptor type, String paramname) {
- if (paramname.equals("this"))
- throw new Error("Can't have parameter named this");
- VarDescriptor vd=new VarDescriptor(type, paramname);
-
- params.add(vd);
- if (paramtable.getFromSameScope(paramname)!=null) {
- throw new Error("Parameter "+paramname+" already defined");
- }
- paramtable.add(vd);
- }
-
- public void addTagParameter(TypeDescriptor type, String paramname) {
- if (paramname.equals("this"))
- throw new Error("Can't have parameter named this");
- TagVarDescriptor vd=new TagVarDescriptor(null, paramname);
-
- params.add(vd);
- if (paramtable.getFromSameScope(paramname)!=null) {
- throw new Error("Parameter "+paramname+" already defined");
- }
- paramtable.add(vd);
- }
-
- public int numParameters() {
- return params.size();
- }
-
- public Descriptor getParameter(int i) {
- return (Descriptor) params.get(i);
- }
-
- public String getParamName(int i) {
- return ((Descriptor)params.get(i)).getSymbol();
- }
-
- public TypeDescriptor getParamType(int i) {
- Descriptor d=(Descriptor)params.get(i);
- if (d instanceof VarDescriptor)
- return ((VarDescriptor)params.get(i)).getType();
- else if (d instanceof TagVarDescriptor)
- return new TypeDescriptor(TypeDescriptor.TAG);
- else throw new Error();
- }
-
- public String toString() {
- String st="";
- String type="";
- if (cd!=null)
- type=cd+".";
- if (returntype!=null)
- st=modifier.toString()+returntype.toString()+" "+type+identifier+"(";
- else
- st=modifier.toString()+" "+type+identifier+"(";
- for(int i=0; i<params.size(); i++) {
- st+=getParamType(i)+" "+getParamName(i);
- if ((i+1)!=params.size())
- st+=", ";
- }
- st+=")";
- return st;
- }
-}