package IR.Tree;
import java.util.*;
+
import IR.*;
public class SemanticCheck {
- State state;
- TypeUtil typeutil;
-
- public SemanticCheck(State state, TypeUtil tu) {
- this.state=state;
- this.typeutil=tu;
- }
-
- public void semanticCheck() {
- SymbolTable classtable=state.getClassSymbolTable();
- Iterator it=classtable.getDescriptorsIterator();
- // Do descriptors first
- while(it.hasNext()) {
- ClassDescriptor cd=(ClassDescriptor)it.next();
- System.out.println("Checking class: "+cd);
- //Set superclass link up
- if (cd.getSuper()!=null) {
- cd.setSuper(typeutil.getClass(cd.getSuper()));
- // Link together Field, Method, and Flag tables so classes
- // inherit these from their superclasses
- cd.getFieldTable().setParent(cd.getSuperDesc().getFieldTable());
- cd.getMethodTable().setParent(cd.getSuperDesc().getMethodTable());
- cd.getFlagTable().setParent(cd.getSuperDesc().getFlagTable());
- }
-
- /* Check to see that fields are well typed */
- for(Iterator field_it=cd.getFields();field_it.hasNext();) {
- FieldDescriptor fd=(FieldDescriptor)field_it.next();
- System.out.println("Checking field: "+fd);
- checkField(cd,fd);
- }
-
- for(Iterator method_it=cd.getMethods();method_it.hasNext();) {
- MethodDescriptor md=(MethodDescriptor)method_it.next();
- checkMethod(cd,md);
- }
+ State state;
+ TypeUtil typeutil;
+ Stack loopstack;
+ HashSet toanalyze;
+ HashMap<ClassDescriptor, Integer> completed;
+
+ //This is the class mappings for a particular file based
+ //on the import names. Maps class to canonical class name.
+ static Hashtable singleImportMap;
+ public static final int NOCHECK=0;
+ public static final int REFERENCE=1;
+ public static final int INIT=2;
+
+ boolean checkAll;
+
+ public boolean hasLayout(ClassDescriptor cd) {
+ return completed.get(cd)!=null&&completed.get(cd)==INIT;
+ }
+
+ public SemanticCheck(State state, TypeUtil tu) {
+ this(state, tu, true);
+ }
+
+ public SemanticCheck(State state, TypeUtil tu, boolean checkAll) {
+ this.state=state;
+ this.typeutil=tu;
+ this.loopstack=new Stack();
+ this.toanalyze=new HashSet();
+ this.completed=new HashMap<ClassDescriptor, Integer>();
+ this.checkAll=checkAll;
+ }
+
+ public ClassDescriptor getClass(ClassDescriptor context, String classname) {
+ return getClass(context, classname, INIT);
+ }
+ public ClassDescriptor getClass(ClassDescriptor context, String classname, int fullcheck) {
+ if (context!=null) {
+// System.out.println(context.getSymbol() + " is looking for " + classname);
+ Hashtable remaptable=context.getSingleImportMappings();
+ classname=remaptable.containsKey(classname)?((String)remaptable.get(classname)):classname;
+ }
+ ClassDescriptor cd=typeutil.getClass(classname, toanalyze);
+ checkClass(cd, fullcheck);
+
+ return cd;
+ }
+
+ public void checkClass(ClassDescriptor cd) {
+ checkClass(cd, INIT);
+ }
+
+ public void checkClass(ClassDescriptor cd, int fullcheck) {
+ if (!completed.containsKey(cd)||completed.get(cd)<fullcheck) {
+ int oldstatus=completed.containsKey(cd)?completed.get(cd):0;
+ completed.put(cd, fullcheck);
+
+ if (fullcheck>=REFERENCE&&oldstatus<INIT) {
+ //Set superclass link up
+ if (cd.getSuper()!=null) {
+ cd.setSuper(getClass(cd, cd.getSuper(), fullcheck));
+ if(cd.getSuperDesc().isInterface()) {
+ throw new Error("Error! Class " + cd.getSymbol() + " extends interface " + cd.getSuper());
+ }
+ // Link together Field, Method, and Flag tables so classes
+ // inherit these from their superclasses
+ if (oldstatus<REFERENCE) {
+ cd.getFieldTable().setParent(cd.getSuperDesc().getFieldTable());
+ cd.getMethodTable().setParent(cd.getSuperDesc().getMethodTable());
+ cd.getFlagTable().setParent(cd.getSuperDesc().getFlagTable());
+ }
}
-
- it=classtable.getDescriptorsIterator();
- // Do descriptors first
- while(it.hasNext()) {
- ClassDescriptor cd=(ClassDescriptor)it.next();
- for(Iterator method_it=cd.getMethods();method_it.hasNext();) {
- MethodDescriptor md=(MethodDescriptor)method_it.next();
- checkMethodBody(cd,md);
- }
+ // Link together Field, Method tables do classes inherit these from
+ // their ancestor interfaces
+ Vector<String> sifv = cd.getSuperInterface();
+ for(int i = 0; i < sifv.size(); i++) {
+ ClassDescriptor superif = getClass(cd, sifv.elementAt(i), fullcheck);
+ if(!superif.isInterface()) {
+ throw new Error("Error! Class " + cd.getSymbol() + " implements non-interface " + superif.getSymbol());
+ }
+ if (oldstatus<REFERENCE) {
+ cd.addSuperInterfaces(superif);
+ cd.getFieldTable().addParentIF(superif.getFieldTable());
+ cd.getMethodTable().addParentIF(superif.getMethodTable());
+ }
}
-
- for(Iterator task_it=state.getTaskSymbolTable().getDescriptorsIterator();task_it.hasNext();) {
- TaskDescriptor td=(TaskDescriptor)task_it.next();
- checkTask(td);
-
+ }
+ if (oldstatus<INIT&&fullcheck>=INIT) {
+ /* Check to see that fields are well typed */
+ for(Iterator field_it=cd.getFields(); field_it.hasNext(); ) {
+ FieldDescriptor fd=(FieldDescriptor)field_it.next();
+ checkField(cd,fd);
}
-
- }
-
- public void checkTypeDescriptor(TypeDescriptor td) {
- if (td.isPrimitive())
- return; /* Done */
- if (td.isClass()) {
- String name=td.toString();
- ClassDescriptor field_cd=(ClassDescriptor)state.getClassSymbolTable().get(name);
- if (field_cd==null)
- throw new Error("Undefined class "+name);
- td.setClassDescriptor(field_cd);
- return;
+ for(Iterator method_it=cd.getMethods(); method_it.hasNext(); ) {
+ MethodDescriptor md=(MethodDescriptor)method_it.next();
+ checkMethod(cd,md);
}
- throw new Error();
+ }
}
-
- public void checkField(ClassDescriptor cd, FieldDescriptor fd) {
- checkTypeDescriptor(fd.getType());
- }
-
- public void checkFlagEffects(TaskDescriptor td, Vector vfe) {
- if (vfe==null)
- return; /* No flag effects to check */
- for(int i=0;i<vfe.size();i++) {
- FlagEffects fe=(FlagEffects) vfe.get(i);
- String varname=fe.getName();
- //Make sure the variable is declared as a parameter to the task
- VarDescriptor vd=(VarDescriptor)td.getParameterTable().get(varname);
- if (vd==null)
- throw new Error("Parameter "+varname+" in Flag Effects not declared");
- fe.setVar(vd);
-
- //Make sure it correspods to a class
- TypeDescriptor type_d=vd.getType();
- if (!type_d.isClass())
- throw new Error("Cannot have non-object argument for flag_effect");
-
- ClassDescriptor cd=type_d.getClassDesc();
- for(int j=0;j<fe.numEffects();j++) {
- FlagEffect flag=fe.getEffect(j);
- String name=flag.getName();
- FlagDescriptor flag_d=(FlagDescriptor)cd.getFlagTable().get(name);
- //Make sure the flag is declared
- if (flag_d==null)
- throw new Error("Flag descriptor "+name+" undefined in class: "+cd.getSymbol());
- flag.setFlag(flag_d);
- }
+ }
+
+ public void semanticCheck() {
+ SymbolTable classtable = state.getClassSymbolTable();
+ toanalyze.addAll(classtable.getValueSet());
+ toanalyze.addAll(state.getTaskSymbolTable().getValueSet());
+
+ // Do methods next
+ while (!toanalyze.isEmpty()) {
+ Object obj = toanalyze.iterator().next();
+ if (obj instanceof TaskDescriptor) {
+ toanalyze.remove(obj);
+ TaskDescriptor td = (TaskDescriptor) obj;
+ try {
+ checkTask(td);
+ } catch (Error e) {
+ System.out.println("Error in " + td);
+ throw e;
+ }
+ } else {
+ ClassDescriptor cd = (ClassDescriptor) obj;
+ toanalyze.remove(cd);
+ //set the class mappings based on imports.
+ singleImportMap = cd.getSingleImportMappings();
+
+ // need to initialize typeutil object here...only place we can
+ // get class descriptors without first calling getclass
+ getClass(cd, cd.getSymbol());
+ for (Iterator method_it = cd.getMethods(); method_it.hasNext(); ) {
+ MethodDescriptor md = (MethodDescriptor) method_it.next();
+ try {
+ checkMethodBody(cd, md);
+ } catch (Error e) {
+ System.out.println("Error in " + md);
+ throw e;
+ }
}
+ }
+ }
+ }
+
+ private void checkTypeDescriptor(ClassDescriptor cd, TypeDescriptor td) {
+ if (td.isPrimitive())
+ return; /* Done */
+ else if (td.isClass()) {
+ String name=td.toString();
+ ClassDescriptor field_cd=checkAll?getClass(cd, name):getClass(cd, name, REFERENCE);
+
+ if (field_cd==null)
+ throw new Error("Undefined class "+name);
+ td.setClassDescriptor(field_cd);
+ return;
+ } else if (td.isTag())
+ return;
+ else
+ throw new Error();
+ }
+
+ public void checkField(ClassDescriptor cd, FieldDescriptor fd) {
+ checkTypeDescriptor(cd, fd.getType());
+ }
+
+ public void checkConstraintCheck(TaskDescriptor td, SymbolTable nametable, Vector ccs) {
+ if (ccs==null)
+ return; /* No constraint checks to check */
+ for(int i=0; i<ccs.size(); i++) {
+ ConstraintCheck cc=(ConstraintCheck) ccs.get(i);
+
+ for(int j=0; j<cc.numArgs(); j++) {
+ ExpressionNode en=cc.getArg(j);
+ checkExpressionNode(td,nametable,en,null);
+ }
+ }
+ }
+
+ public void checkFlagEffects(TaskDescriptor td, Vector vfe, SymbolTable nametable) {
+ if (vfe==null)
+ return; /* No flag effects to check */
+ for(int i=0; i<vfe.size(); i++) {
+ FlagEffects fe=(FlagEffects) vfe.get(i);
+ String varname=fe.getName();
+ //Make sure the variable is declared as a parameter to the task
+ VarDescriptor vd=(VarDescriptor)td.getParameterTable().get(varname);
+ if (vd==null)
+ throw new Error("Parameter "+varname+" in Flag Effects not declared in "+td);
+ fe.setVar(vd);
+
+ //Make sure it correspods to a class
+ TypeDescriptor type_d=vd.getType();
+ if (!type_d.isClass())
+ throw new Error("Cannot have non-object argument for flag_effect");
+
+ ClassDescriptor cd=type_d.getClassDesc();
+ for(int j=0; j<fe.numEffects(); j++) {
+ FlagEffect flag=fe.getEffect(j);
+ String name=flag.getName();
+ FlagDescriptor flag_d=(FlagDescriptor)cd.getFlagTable().get(name);
+ //Make sure the flag is declared
+ if (flag_d==null)
+ throw new Error("Flag descriptor "+name+" undefined in class: "+cd.getSymbol());
+ if (flag_d.getExternal())
+ throw new Error("Attempting to modify external flag: "+name);
+ flag.setFlag(flag_d);
+ }
+ for(int j=0; j<fe.numTagEffects(); j++) {
+ TagEffect tag=fe.getTagEffect(j);
+ String name=tag.getName();
+
+ Descriptor d=(Descriptor)nametable.get(name);
+ if (d==null)
+ throw new Error("Tag descriptor "+name+" undeclared");
+ else if (!(d instanceof TagVarDescriptor))
+ throw new Error(name+" is not a tag descriptor");
+ tag.setTag((TagVarDescriptor)d);
+ }
+ }
+ }
+
+ public void checkTask(TaskDescriptor td) {
+ for(int i=0; i<td.numParameters(); i++) {
+ /* Check that parameter is well typed */
+ TypeDescriptor param_type=td.getParamType(i);
+ checkTypeDescriptor(null, param_type);
+
+ /* Check the parameter's flag expression is well formed */
+ FlagExpressionNode fen=td.getFlag(td.getParameter(i));
+ if (!param_type.isClass())
+ throw new Error("Cannot have non-object argument to a task");
+ ClassDescriptor cd=param_type.getClassDesc();
+ if (fen!=null)
+ checkFlagExpressionNode(cd, fen);
}
- public void checkTask(TaskDescriptor td) {
- for(int i=0;i<td.numParameters();i++) {
- /* Check that parameter is well typed */
- TypeDescriptor param_type=td.getParamType(i);
- checkTypeDescriptor(param_type);
-
- /* Check the parameter's flag expression is well formed */
- FlagExpressionNode fen=td.getFlag(td.getParameter(i));
- if (!param_type.isClass())
- throw new Error("Cannot have non-object argument to a task");
- ClassDescriptor cd=param_type.getClassDesc();
- checkFlagExpressionNode(cd, fen);
- checkFlagEffects(td, td.getFlagEffects());
-
- /* Check that the task code is valid */
- BlockNode bn=state.getMethodBody(td);
- checkBlockNode(td, td.getParameterTable(),bn);
- }
+ checkFlagEffects(td, td.getFlagEffects(),td.getParameterTable());
+ /* Check that the task code is valid */
+ BlockNode bn=state.getMethodBody(td);
+ checkBlockNode(td, td.getParameterTable(),bn);
+ }
+
+ public void checkFlagExpressionNode(ClassDescriptor cd, FlagExpressionNode fen) {
+ switch(fen.kind()) {
+ case Kind.FlagOpNode:
+ {
+ FlagOpNode fon=(FlagOpNode)fen;
+ checkFlagExpressionNode(cd, fon.getLeft());
+ if (fon.getRight()!=null)
+ checkFlagExpressionNode(cd, fon.getRight());
+ break;
}
- public void checkFlagExpressionNode(ClassDescriptor cd, FlagExpressionNode fen) {
- switch(fen.kind()) {
- case Kind.FlagOpNode:
- {
- FlagOpNode fon=(FlagOpNode)fen;
- checkFlagExpressionNode(cd, fon.getLeft());
- if (fon.getRight()!=null)
- checkFlagExpressionNode(cd, fon.getRight());
- break;
- }
- case Kind.FlagNode:
- {
- FlagNode fn=(FlagNode)fen;
- String name=fn.getFlagName();
- FlagDescriptor fd=(FlagDescriptor)cd.getFlagTable().get(name);
- if (fd==null)
- throw new Error("Undeclared flag: "+name);
- fn.setFlag(fd);
- break;
- }
- default:
- throw new Error("Unrecognized FlagExpressionNode");
- }
+ case Kind.FlagNode:
+ {
+ FlagNode fn=(FlagNode)fen;
+ String name=fn.getFlagName();
+ FlagDescriptor fd=(FlagDescriptor)cd.getFlagTable().get(name);
+ if (fd==null)
+ throw new Error("Undeclared flag: "+name);
+ fn.setFlag(fd);
+ break;
}
- public void checkMethod(ClassDescriptor cd, MethodDescriptor md) {
- /* Check return type */
- if (!md.isConstructor())
- if (!md.getReturnType().isVoid())
- checkTypeDescriptor(md.getReturnType());
+ default:
+ throw new Error("Unrecognized FlagExpressionNode");
+ }
+ }
+
+ public void checkMethod(ClassDescriptor cd, MethodDescriptor md) {
+ /* Check for abstract methods */
+ if(md.isAbstract()) {
+ if(!cd.isAbstract() && !cd.isInterface()) {
+ throw new Error("Error! The non-abstract Class " + cd.getSymbol() + " contains an abstract method " + md.getSymbol());
+ }
+ }
- for(int i=0;i<md.numParameters();i++) {
- TypeDescriptor param_type=md.getParamType(i);
- checkTypeDescriptor(param_type);
- }
- /* Link the naming environments */
- if (!md.isStatic()) /* Fields aren't accessible directly in a static method, so don't link in this table */
- md.getParameterTable().setParent(cd.getFieldTable());
- md.setClassDesc(cd);
- if (!md.isStatic()) {
- VarDescriptor thisvd=new VarDescriptor(new TypeDescriptor(cd),"this");
- md.setThis(thisvd);
+ /* Check return type */
+ if (!md.isConstructor() && !md.isStaticBlock())
+ if (!md.getReturnType().isVoid()) {
+ checkTypeDescriptor(cd, md.getReturnType());
+ }
+ for(int i=0; i<md.numParameters(); i++) {
+ TypeDescriptor param_type=md.getParamType(i);
+ checkTypeDescriptor(cd, param_type);
+ }
+ /* Link the naming environments */
+ if (!md.isStatic()) /* Fields aren't accessible directly in a static method, so don't link in this table */
+ md.getParameterTable().setParent(cd.getFieldTable());
+ md.setClassDesc(cd);
+ if (!md.isStatic()) {
+ VarDescriptor thisvd=new VarDescriptor(new TypeDescriptor(cd),"this");
+ md.setThis(thisvd);
+ }
+ if(md.isDefaultConstructor() && (cd.getSuperDesc() != null)) {
+ // add the construction of it super class, can only be super()
+ NameDescriptor nd=new NameDescriptor("super");
+ MethodInvokeNode min=new MethodInvokeNode(nd);
+ BlockExpressionNode ben=new BlockExpressionNode(min);
+ BlockNode bn = state.getMethodBody(md);
+ bn.addFirstBlockStatement(ben);
+ }
+ }
+
+ public void checkMethodBody(ClassDescriptor cd, MethodDescriptor md) {
+ ClassDescriptor superdesc=cd.getSuperDesc();
+ if (superdesc!=null) {
+ Set possiblematches=superdesc.getMethodTable().getSet(md.getSymbol());
+ for(Iterator methodit=possiblematches.iterator(); methodit.hasNext(); ) {
+ MethodDescriptor matchmd=(MethodDescriptor)methodit.next();
+ if (md.matches(matchmd)) {
+ if (matchmd.getModifiers().isFinal()) {
+ throw new Error("Try to override final method in method:"+md+" declared in "+cd);
+ }
}
+ }
+ }
+ BlockNode bn=state.getMethodBody(md);
+ checkBlockNode(md, md.getParameterTable(),bn);
+ }
+
+ public void checkBlockNode(Descriptor md, SymbolTable nametable, BlockNode bn) {
+ /* Link in the naming environment */
+ bn.getVarTable().setParent(nametable);
+ for(int i=0; i<bn.size(); i++) {
+ BlockStatementNode bsn=bn.get(i);
+ checkBlockStatementNode(md, bn.getVarTable(),bsn);
+ }
+ }
+
+ public void checkBlockStatementNode(Descriptor md, SymbolTable nametable, BlockStatementNode bsn) {
+ switch(bsn.kind()) {
+ case Kind.BlockExpressionNode:
+ checkBlockExpressionNode(md, nametable,(BlockExpressionNode)bsn);
+ return;
+
+ case Kind.DeclarationNode:
+ checkDeclarationNode(md, nametable, (DeclarationNode)bsn);
+ return;
+
+ case Kind.TagDeclarationNode:
+ checkTagDeclarationNode(md, nametable, (TagDeclarationNode)bsn);
+ return;
+
+ case Kind.IfStatementNode:
+ checkIfStatementNode(md, nametable, (IfStatementNode)bsn);
+ return;
+
+ case Kind.SwitchStatementNode:
+ checkSwitchStatementNode(md, nametable, (SwitchStatementNode)bsn);
+ return;
+
+ case Kind.LoopNode:
+ checkLoopNode(md, nametable, (LoopNode)bsn);
+ return;
+
+ case Kind.ReturnNode:
+ checkReturnNode(md, nametable, (ReturnNode)bsn);
+ return;
+
+ case Kind.TaskExitNode:
+ checkTaskExitNode(md, nametable, (TaskExitNode)bsn);
+ return;
+
+ case Kind.SubBlockNode:
+ checkSubBlockNode(md, nametable, (SubBlockNode)bsn);
+ return;
+
+ case Kind.AtomicNode:
+ checkAtomicNode(md, nametable, (AtomicNode)bsn);
+ return;
+
+ case Kind.SynchronizedNode:
+ checkSynchronizedNode(md, nametable, (SynchronizedNode)bsn);
+ return;
+
+ case Kind.ContinueBreakNode:
+ checkContinueBreakNode(md, nametable, (ContinueBreakNode) bsn);
+ return;
+
+ case Kind.SESENode:
+ case Kind.GenReachNode:
+ // do nothing, no semantic check for SESEs
+ return;
}
- public void checkMethodBody(ClassDescriptor cd, MethodDescriptor md) {
- System.out.println("Processing method:"+md);
- BlockNode bn=state.getMethodBody(md);
- checkBlockNode(md, md.getParameterTable(),bn);
+ throw new Error();
+ }
+
+ void checkBlockExpressionNode(Descriptor md, SymbolTable nametable, BlockExpressionNode ben) {
+ checkExpressionNode(md, nametable, ben.getExpression(), null);
+ }
+
+ void checkDeclarationNode(Descriptor md, SymbolTable nametable, DeclarationNode dn) {
+ VarDescriptor vd=dn.getVarDescriptor();
+ checkTypeDescriptor(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null), vd.getType());
+ Descriptor d=nametable.get(vd.getSymbol());
+ if ((d==null)||
+ (d instanceof FieldDescriptor)) {
+ nametable.add(vd);
+ } else
+ throw new Error(vd.getSymbol()+" in "+md+" defined a second time");
+ if (dn.getExpression()!=null)
+ checkExpressionNode(md, nametable, dn.getExpression(), vd.getType());
+ }
+
+ void checkTagDeclarationNode(Descriptor md, SymbolTable nametable, TagDeclarationNode dn) {
+ TagVarDescriptor vd=dn.getTagVarDescriptor();
+ Descriptor d=nametable.get(vd.getSymbol());
+ if ((d==null)||
+ (d instanceof FieldDescriptor)) {
+ nametable.add(vd);
+ } else
+ throw new Error(vd.getSymbol()+" defined a second time");
+ }
+
+ void checkSubBlockNode(Descriptor md, SymbolTable nametable, SubBlockNode sbn) {
+ checkBlockNode(md, nametable, sbn.getBlockNode());
+ }
+
+ void checkAtomicNode(Descriptor md, SymbolTable nametable, AtomicNode sbn) {
+ checkBlockNode(md, nametable, sbn.getBlockNode());
+ }
+
+ void checkSynchronizedNode(Descriptor md, SymbolTable nametable, SynchronizedNode sbn) {
+ checkBlockNode(md, nametable, sbn.getBlockNode());
+ //todo this could be Object
+ checkExpressionNode(md, nametable, sbn.getExpr(), null);
+ }
+
+ void checkContinueBreakNode(Descriptor md, SymbolTable nametable, ContinueBreakNode cbn) {
+ if (loopstack.empty())
+ throw new Error("continue/break outside of loop");
+ Object o = loopstack.peek();
+ if(o instanceof LoopNode) {
+ LoopNode ln=(LoopNode)o;
+ cbn.setLoop(ln);
}
-
- public void checkBlockNode(Descriptor md, SymbolTable nametable, BlockNode bn) {
- /* Link in the naming environment */
- bn.getVarTable().setParent(nametable);
- for(int i=0;i<bn.size();i++) {
- BlockStatementNode bsn=bn.get(i);
- checkBlockStatementNode(md, bn.getVarTable(),bsn);
- }
+ }
+
+ void checkReturnNode(Descriptor d, SymbolTable nametable, ReturnNode rn) {
+ if (d instanceof TaskDescriptor)
+ throw new Error("Illegal return appears in Task: "+d.getSymbol());
+ MethodDescriptor md=(MethodDescriptor)d;
+ if (rn.getReturnExpression()!=null)
+ if (md.getReturnType()==null)
+ throw new Error("Constructor can't return something.");
+ else if (md.getReturnType().isVoid())
+ throw new Error(md+" is void");
+ else
+ checkExpressionNode(md, nametable, rn.getReturnExpression(), md.getReturnType());
+ else
+ if (md.getReturnType()!=null&&!md.getReturnType().isVoid())
+ throw new Error("Need to return something for "+md);
+ }
+
+ void checkTaskExitNode(Descriptor md, SymbolTable nametable, TaskExitNode ten) {
+ if (md instanceof MethodDescriptor)
+ throw new Error("Illegal taskexit appears in Method: "+md.getSymbol());
+ checkFlagEffects((TaskDescriptor)md, ten.getFlagEffects(),nametable);
+ checkConstraintCheck((TaskDescriptor) md, nametable, ten.getChecks());
+ }
+
+ void checkIfStatementNode(Descriptor md, SymbolTable nametable, IfStatementNode isn) {
+ checkExpressionNode(md, nametable, isn.getCondition(), new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ checkBlockNode(md, nametable, isn.getTrueBlock());
+ if (isn.getFalseBlock()!=null)
+ checkBlockNode(md, nametable, isn.getFalseBlock());
+ }
+
+ void checkSwitchStatementNode(Descriptor md, SymbolTable nametable, SwitchStatementNode ssn) {
+ checkExpressionNode(md, nametable, ssn.getCondition(), new TypeDescriptor(TypeDescriptor.INT));
+
+ BlockNode sbn = ssn.getSwitchBody();
+ boolean hasdefault = false;
+ for(int i = 0; i < sbn.size(); i++) {
+ boolean containdefault = checkSwitchBlockNode(md, nametable, (SwitchBlockNode)sbn.get(i));
+ if(hasdefault && containdefault) {
+ throw new Error("Error: duplicate default branch in switch-case statement in Method: " + md.getSymbol());
+ }
+ hasdefault = containdefault;
}
-
- public void checkBlockStatementNode(Descriptor md, SymbolTable nametable, BlockStatementNode bsn) {
- switch(bsn.kind()) {
- case Kind.BlockExpressionNode:
- checkBlockExpressionNode(md, nametable,(BlockExpressionNode)bsn);
- return;
+ }
+
+ boolean checkSwitchBlockNode(Descriptor md, SymbolTable nametable, SwitchBlockNode sbn) {
+ Vector<SwitchLabelNode> slnv = sbn.getSwitchConditions();
+ int defaultb = 0;
+ for(int i = 0; i < slnv.size(); i++) {
+ if(slnv.elementAt(i).isdefault) {
+ defaultb++;
+ } else {
+ checkConstantExpressionNode(md, nametable, slnv.elementAt(i).getCondition(), new TypeDescriptor(TypeDescriptor.INT));
+ }
+ }
+ if(defaultb > 1) {
+ throw new Error("Error: duplicate default branch in switch-case statement in Method: " + md.getSymbol());
+ } else {
+ loopstack.push(sbn);
+ checkBlockNode(md, nametable, sbn.getSwitchBlockStatement());
+ loopstack.pop();
+ return (defaultb > 0);
+ }
+ }
- case Kind.DeclarationNode:
- checkDeclarationNode(md, nametable, (DeclarationNode)bsn);
- return;
-
- case Kind.IfStatementNode:
- checkIfStatementNode(md, nametable, (IfStatementNode)bsn);
- return;
-
- case Kind.LoopNode:
- checkLoopNode(md, nametable, (LoopNode)bsn);
- return;
-
- case Kind.ReturnNode:
- checkReturnNode(md, nametable, (ReturnNode)bsn);
- return;
+ void checkConstantExpressionNode(Descriptor md, SymbolTable nametable, ExpressionNode en, TypeDescriptor td) {
+ switch(en.kind()) {
+ case Kind.FieldAccessNode:
+ checkFieldAccessNode(md,nametable,(FieldAccessNode)en,td);
+ return;
- case Kind.TaskExitNode:
- checkTaskExitNode(md, nametable, (TaskExitNode)bsn);
- return;
+ case Kind.LiteralNode:
+ checkLiteralNode(md,nametable,(LiteralNode)en,td);
+ return;
- case Kind.SubBlockNode:
- checkSubBlockNode(md, nametable, (SubBlockNode)bsn);
- return;
- }
- throw new Error();
- }
+ case Kind.NameNode:
+ checkNameNode(md,nametable,(NameNode)en,td);
+ return;
- void checkBlockExpressionNode(Descriptor md, SymbolTable nametable, BlockExpressionNode ben) {
- checkExpressionNode(md, nametable, ben.getExpression(), null);
+ case Kind.OpNode:
+ checkOpNode(md, nametable, (OpNode)en, td);
+ return;
}
-
- void checkDeclarationNode(Descriptor md, SymbolTable nametable, DeclarationNode dn) {
- VarDescriptor vd=dn.getVarDescriptor();
- checkTypeDescriptor(vd.getType());
- Descriptor d=nametable.get(vd.getSymbol());
- if ((d==null)||
- (d instanceof FieldDescriptor)) {
- nametable.add(vd);
- } else
- throw new Error(vd.getSymbol()+" defined a second time");
- if (dn.getExpression()!=null)
- checkExpressionNode(md, nametable, dn.getExpression(), vd.getType());
+ throw new Error();
+ }
+
+ void checkExpressionNode(Descriptor md, SymbolTable nametable, ExpressionNode en, TypeDescriptor td) {
+ switch(en.kind()) {
+ case Kind.AssignmentNode:
+ checkAssignmentNode(md,nametable,(AssignmentNode)en,td);
+ return;
+
+ case Kind.CastNode:
+ checkCastNode(md,nametable,(CastNode)en,td);
+ return;
+
+ case Kind.CreateObjectNode:
+ checkCreateObjectNode(md,nametable,(CreateObjectNode)en,td);
+ return;
+
+ case Kind.FieldAccessNode:
+ checkFieldAccessNode(md,nametable,(FieldAccessNode)en,td);
+ return;
+
+ case Kind.ArrayAccessNode:
+ checkArrayAccessNode(md,nametable,(ArrayAccessNode)en,td);
+ return;
+
+ case Kind.LiteralNode:
+ checkLiteralNode(md,nametable,(LiteralNode)en,td);
+ return;
+
+ case Kind.MethodInvokeNode:
+ checkMethodInvokeNode(md,nametable,(MethodInvokeNode)en,td);
+ return;
+
+ case Kind.NameNode:
+ checkNameNode(md,nametable,(NameNode)en,td);
+ return;
+
+ case Kind.OpNode:
+ checkOpNode(md,nametable,(OpNode)en,td);
+ return;
+
+ case Kind.OffsetNode:
+ checkOffsetNode(md, nametable, (OffsetNode)en, td);
+ return;
+
+ case Kind.TertiaryNode:
+ checkTertiaryNode(md, nametable, (TertiaryNode)en, td);
+ return;
+
+ case Kind.InstanceOfNode:
+ checkInstanceOfNode(md, nametable, (InstanceOfNode) en, td);
+ return;
+
+ case Kind.ArrayInitializerNode:
+ checkArrayInitializerNode(md, nametable, (ArrayInitializerNode) en, td);
+ return;
+
+ case Kind.ClassTypeNode:
+ checkClassTypeNode(md, nametable, (ClassTypeNode) en, td);
+ return;
}
-
- void checkSubBlockNode(Descriptor md, SymbolTable nametable, SubBlockNode sbn) {
- checkBlockNode(md, nametable, sbn.getBlockNode());
+ throw new Error();
+ }
+
+ void checkClassTypeNode(Descriptor md, SymbolTable nametable, ClassTypeNode tn, TypeDescriptor td) {
+ checkTypeDescriptor(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null), tn.getType());
+ }
+
+ void checkCastNode(Descriptor md, SymbolTable nametable, CastNode cn, TypeDescriptor td) {
+ /* Get type descriptor */
+ if (cn.getType()==null) {
+ NameDescriptor typenamed=cn.getTypeName().getName();
+ TypeDescriptor ntd=new TypeDescriptor(getClass(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null), typenamed.toString()));
+ cn.setType(ntd);
}
- void checkReturnNode(Descriptor d, SymbolTable nametable, ReturnNode rn) {
- if (d instanceof TaskDescriptor)
- throw new Error("Illegal return appears in Task: "+d.getSymbol());
- MethodDescriptor md=(MethodDescriptor)d;
- if (rn.getReturnExpression()!=null)
- checkExpressionNode(md, nametable, rn.getReturnExpression(), md.getReturnType());
- else
- if (md.getReturnType()!=null&&!md.getReturnType().isVoid())
- throw new Error("Need to return something for "+md);
+ /* Check the type descriptor */
+ TypeDescriptor cast_type=cn.getType();
+ checkTypeDescriptor(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null),cast_type);
+
+ /* Type check */
+ if (td!=null) {
+ if (!typeutil.isSuperorType(td,cast_type))
+ throw new Error("Cast node returns "+cast_type+", but need "+td);
}
- void checkTaskExitNode(Descriptor md, SymbolTable nametable, TaskExitNode ten) {
- if (md instanceof MethodDescriptor)
- throw new Error("Illegal taskexit appears in Method: "+md.getSymbol());
- checkFlagEffects((TaskDescriptor)md, ten.getFlagEffects());
+ ExpressionNode en=cn.getExpression();
+ checkExpressionNode(md, nametable, en, null);
+ TypeDescriptor etd=en.getType();
+ if (typeutil.isSuperorType(cast_type,etd)) /* Cast trivially succeeds */
+ return;
+
+ if (typeutil.isSuperorType(etd,cast_type)) /* Cast may succeed */
+ return;
+ if (typeutil.isCastable(etd, cast_type))
+ return;
+
+ /* Different branches */
+ /* TODO: change if add interfaces */
+ throw new Error("Cast will always fail\n"+cn.printNode(0));
+ }
+
+ void checkFieldAccessNode(Descriptor md, SymbolTable nametable, FieldAccessNode fan, TypeDescriptor td) {
+ ExpressionNode left=fan.getExpression();
+ checkExpressionNode(md,nametable,left,null);
+ TypeDescriptor ltd=left.getType();
+ String fieldname=fan.getFieldName();
+
+ FieldDescriptor fd=null;
+ if (ltd.isArray()&&fieldname.equals("length"))
+ fd=FieldDescriptor.arrayLength;
+ else
+ fd=(FieldDescriptor) ltd.getClassDesc().getFieldTable().get(fieldname);
+
+ if(ltd.isClassNameRef()) {
+ // the field access is using a class name directly
+ if(ltd.getClassDesc().isEnum()) {
+ int value = ltd.getClassDesc().getEnumConstant(fieldname);
+ if(-1 == value) {
+ // check if this field is an enum constant
+ throw new Error(fieldname + " is not an enum constant in "+fan.printNode(0)+" in "+md);
+ }
+ fd = new FieldDescriptor(new Modifiers(Modifiers.PUBLIC|Modifiers.FINAL), new TypeDescriptor(TypeDescriptor.INT), fieldname, null, false);
+ fd.setAsEnum();
+ fd.setEnumValue(value);
+ } else if(fd == null) {
+ throw new Error("Could not find field "+ fieldname + " in "+fan.printNode(0)+" in "+md + " (Line: "+fan.getNumLine()+")");
+ } else if(fd.isStatic()) {
+ // check if this field is a static field
+ if(fd.getExpressionNode() != null) {
+ checkExpressionNode(md,nametable,fd.getExpressionNode(),null);
+ }
+ } else {
+ throw new Error("Dereference of the non-static field "+ fieldname + " in "+fan.printNode(0)+" in "+md);
+ }
}
- void checkIfStatementNode(Descriptor md, SymbolTable nametable, IfStatementNode isn) {
- checkExpressionNode(md, nametable, isn.getCondition(), new TypeDescriptor(TypeDescriptor.BOOLEAN));
- checkBlockNode(md, nametable, isn.getTrueBlock());
- if (isn.getFalseBlock()!=null)
- checkBlockNode(md, nametable, isn.getFalseBlock());
+ if (fd==null)
+ throw new Error("Unknown field "+fieldname + " in "+fan.printNode(0)+" in "+md);
+
+ if (fd.getType().iswrapper()) {
+ FieldAccessNode fan2=new FieldAccessNode(left, fieldname);
+ fan2.setNumLine(left.getNumLine());
+ fan2.setField(fd);
+ fan.left=fan2;
+ fan.fieldname="value";
+
+ ExpressionNode leftwr=fan.getExpression();
+ TypeDescriptor ltdwr=leftwr.getType();
+ String fieldnamewr=fan.getFieldName();
+ FieldDescriptor fdwr=(FieldDescriptor) ltdwr.getClassDesc().getFieldTable().get(fieldnamewr);
+ fan.setField(fdwr);
+ if (fdwr==null)
+ throw new Error("Unknown field "+fieldnamewr + " in "+fan.printNode(0)+" in "+md);
+ } else {
+ fan.setField(fd);
}
-
- void checkExpressionNode(Descriptor md, SymbolTable nametable, ExpressionNode en, TypeDescriptor td) {
- switch(en.kind()) {
- case Kind.AssignmentNode:
- checkAssignmentNode(md,nametable,(AssignmentNode)en,td);
- return;
- case Kind.CastNode:
- checkCastNode(md,nametable,(CastNode)en,td);
- return;
- case Kind.CreateObjectNode:
- checkCreateObjectNode(md,nametable,(CreateObjectNode)en,td);
- return;
- case Kind.FieldAccessNode:
- checkFieldAccessNode(md,nametable,(FieldAccessNode)en,td);
- return;
- case Kind.ArrayAccessNode:
- checkArrayAccessNode(md,nametable,(ArrayAccessNode)en,td);
- return;
- case Kind.LiteralNode:
- checkLiteralNode(md,nametable,(LiteralNode)en,td);
- return;
- case Kind.MethodInvokeNode:
- checkMethodInvokeNode(md,nametable,(MethodInvokeNode)en,td);
- return;
- case Kind.NameNode:
- checkNameNode(md,nametable,(NameNode)en,td);
- return;
- case Kind.OpNode:
- checkOpNode(md,nametable,(OpNode)en,td);
- return;
- }
- throw new Error();
+ if (td!=null) {
+ if (!typeutil.isSuperorType(td,fan.getType()))
+ throw new Error("Field node returns "+fan.getType()+", but need "+td);
}
+ }
- void checkCastNode(Descriptor md, SymbolTable nametable, CastNode cn, TypeDescriptor td) {
- /* Get type descriptor */
- if (cn.getType()==null) {
- NameDescriptor typenamed=cn.getTypeName().getName();
- String typename=typenamed.toString();
- TypeDescriptor ntd=new TypeDescriptor(typeutil.getClass(typename));
- cn.setType(ntd);
- }
+ void checkArrayAccessNode(Descriptor md, SymbolTable nametable, ArrayAccessNode aan, TypeDescriptor td) {
+ ExpressionNode left=aan.getExpression();
+ checkExpressionNode(md,nametable,left,null);
- /* Check the type descriptor */
- TypeDescriptor cast_type=cn.getType();
- checkTypeDescriptor(cast_type);
-
- /* Type check */
- if (td!=null) {
- if (!typeutil.isSuperorType(td,cast_type))
- throw new Error("Cast node returns "+cast_type+", but need "+td);
- }
-
- ExpressionNode en=cn.getExpression();
- checkExpressionNode(md, nametable, en, null);
- TypeDescriptor etd=en.getType();
- if (typeutil.isSuperorType(cast_type,etd)) /* Cast trivially succeeds */
- return;
+ checkExpressionNode(md,nametable,aan.getIndex(),new TypeDescriptor(TypeDescriptor.INT));
+ TypeDescriptor ltd=left.getType();
+ if (ltd.dereference().iswrapper()) {
+ aan.wrappertype=((FieldDescriptor)ltd.dereference().getClassDesc().getFieldTable().get("value")).getType();
+ }
- if (typeutil.isSuperorType(etd,cast_type)) /* Cast may succeed */
- return;
+ if (td!=null)
+ if (!typeutil.isSuperorType(td,aan.getType()))
+ throw new Error("Field node returns "+aan.getType()+", but need "+td);
+ }
+
+ void checkLiteralNode(Descriptor md, SymbolTable nametable, LiteralNode ln, TypeDescriptor td) {
+ /* Resolve the type */
+ Object o=ln.getValue();
+ if (ln.getTypeString().equals("null")) {
+ ln.setType(new TypeDescriptor(TypeDescriptor.NULL));
+ } else if (o instanceof Integer) {
+ ln.setType(new TypeDescriptor(TypeDescriptor.INT));
+ } else if (o instanceof Long) {
+ ln.setType(new TypeDescriptor(TypeDescriptor.LONG));
+ } else if (o instanceof Float) {
+ ln.setType(new TypeDescriptor(TypeDescriptor.FLOAT));
+ } else if (o instanceof Boolean) {
+ ln.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ } else if (o instanceof Double) {
+ ln.setType(new TypeDescriptor(TypeDescriptor.DOUBLE));
+ } else if (o instanceof Character) {
+ ln.setType(new TypeDescriptor(TypeDescriptor.CHAR));
+ } else if (o instanceof String) {
+ ln.setType(new TypeDescriptor(getClass(null, TypeUtil.StringClass)));
+ }
- /* Different branches */
- /* TODO: change if add interfaces */
- throw new Error("Cast will always fail\n"+cn.printNode(0));
- }
-
- void checkFieldAccessNode(Descriptor md, SymbolTable nametable, FieldAccessNode fan, TypeDescriptor td) {
- ExpressionNode left=fan.getExpression();
- checkExpressionNode(md,nametable,left,null);
- TypeDescriptor ltd=left.getType();
- String fieldname=fan.getFieldName();
-
- FieldDescriptor fd=null;
- if (ltd.isArray()&&fieldname.equals("length"))
- fd=FieldDescriptor.arrayLength;
- else
- fd=(FieldDescriptor) ltd.getClassDesc().getFieldTable().get(fieldname);
- if (fd==null)
- throw new Error("Unknown field "+fieldname);
- fan.setField(fd);
- if (td!=null)
- if (!typeutil.isSuperorType(td,fan.getType()))
- throw new Error("Field node returns "+fan.getType()+", but need "+td);
- }
-
- void checkArrayAccessNode(Descriptor md, SymbolTable nametable, ArrayAccessNode aan, TypeDescriptor td) {
- ExpressionNode left=aan.getExpression();
- checkExpressionNode(md,nametable,left,null);
-
- checkExpressionNode(md,nametable,aan.getIndex(),new TypeDescriptor(TypeDescriptor.INT));
- TypeDescriptor ltd=left.getType();
-
- if (td!=null)
- if (!typeutil.isSuperorType(td,aan.getType()))
- throw new Error("Field node returns "+aan.getType()+", but need "+td);
- }
-
- void checkLiteralNode(Descriptor md, SymbolTable nametable, LiteralNode ln, TypeDescriptor td) {
- /* Resolve the type */
- Object o=ln.getValue();
- if (ln.getTypeString().equals("null")) {
- ln.setType(new TypeDescriptor(TypeDescriptor.NULL));
- } else if (o instanceof Integer) {
- ln.setType(new TypeDescriptor(TypeDescriptor.INT));
- } else if (o instanceof Long) {
- ln.setType(new TypeDescriptor(TypeDescriptor.LONG));
- } else if (o instanceof Float) {
- ln.setType(new TypeDescriptor(TypeDescriptor.FLOAT));
- } else if (o instanceof Boolean) {
- ln.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
- } else if (o instanceof Double) {
- ln.setType(new TypeDescriptor(TypeDescriptor.DOUBLE));
- } else if (o instanceof Character) {
- ln.setType(new TypeDescriptor(TypeDescriptor.CHAR));
- } else if (o instanceof String) {
- ln.setType(new TypeDescriptor(typeutil.getClass(TypeUtil.StringClass)));
- }
-
- if (td!=null)
- if (!typeutil.isSuperorType(td,ln.getType()))
- throw new Error("Field node returns "+ln.getType()+", but need "+td);
- }
-
- void checkNameNode(Descriptor md, SymbolTable nametable, NameNode nn, TypeDescriptor td) {
- NameDescriptor nd=nn.getName();
- if (nd.getBase()!=null) {
- /* Big hack */
- /* Rewrite NameNode */
- ExpressionNode en=translateNameDescriptorintoExpression(nd);
- nn.setExpression(en);
- checkExpressionNode(md,nametable,en,td);
+ if (td!=null)
+ if (!typeutil.isSuperorType(td,ln.getType())) {
+ Long l = ln.evaluate();
+ if((ln.getType().isByte() || ln.getType().isShort()
+ || ln.getType().isChar() || ln.getType().isInt())
+ && (l != null)
+ && (td.isByte() || td.isShort() || td.isChar()
+ || td.isInt() || td.isLong())) {
+ long lnvalue = l.longValue();
+ if((td.isByte() && ((lnvalue > 127) || (lnvalue < -128)))
+ || (td.isShort() && ((lnvalue > 32767) || (lnvalue < -32768)))
+ || (td.isChar() && ((lnvalue > 65535) || (lnvalue < 0)))
+ || (td.isInt() && ((lnvalue > 2147483647) || (lnvalue < -2147483648)))
+ || (td.isLong() && ((lnvalue > 9223372036854775807L) || (lnvalue < -9223372036854775808L)))) {
+ throw new Error("Field node returns "+ln.getType()+", but need "+td+" in "+md);
+ }
} else {
- String varname=nd.toString();
- Descriptor d=(Descriptor)nametable.get(varname);
- if (d==null) {
- throw new Error("Name "+varname+" undefined");
+ throw new Error("Field node returns "+ln.getType()+", but need "+td+" in "+md);
+ }
+ }
+ }
+
+ void checkNameNode(Descriptor md, SymbolTable nametable, NameNode nn, TypeDescriptor td) {
+ NameDescriptor nd=nn.getName();
+ if (nd.getBase()!=null) {
+ /* Big hack */
+ /* Rewrite NameNode */
+ ExpressionNode en=translateNameDescriptorintoExpression(nd,nn.getNumLine());
+ nn.setExpression(en);
+ checkExpressionNode(md,nametable,en,td);
+ } else {
+ String varname=nd.toString();
+ if(varname.equals("this")) {
+ // "this"
+ nn.setVar((VarDescriptor)nametable.get("this"));
+ return;
+ }
+ Descriptor d=(Descriptor)nametable.get(varname);
+ if (d==null) {
+ ClassDescriptor cd = null;
+ if((md instanceof MethodDescriptor) && ((MethodDescriptor)md).isStaticBlock()) {
+ // this is a static block, all the accessed fields should be static field
+ cd = ((MethodDescriptor)md).getClassDesc();
+ SymbolTable fieldtbl = cd.getFieldTable();
+ FieldDescriptor fd=(FieldDescriptor)fieldtbl.get(varname);
+ if((fd == null) || (!fd.isStatic())) {
+ // no such field in the class, check if this is a class
+ if(varname.equals("this")) {
+ throw new Error("Error: access this obj in a static block");
}
- if (d instanceof VarDescriptor) {
- nn.setVar((VarDescriptor)d);
- } else if (d instanceof FieldDescriptor) {
- nn.setField((FieldDescriptor)d);
- nn.setVar((VarDescriptor)nametable.get("this")); /* Need a pointer to this */
+ cd=getClass(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null), varname);
+ if(cd != null) {
+ // this is a class name
+ nn.setClassDesc(cd);
+ return;
+ } else {
+ throw new Error("Name "+varname+" should not be used in static block: "+md);
}
- if (td!=null)
+ } else {
+ // this is a static field
+ nn.setField(fd);
+ nn.setClassDesc(cd);
+ return;
+ }
+ } else {
+ // check if the var is a static field of the class
+ if(md instanceof MethodDescriptor) {
+ cd = ((MethodDescriptor)md).getClassDesc();
+ FieldDescriptor fd = (FieldDescriptor)cd.getFieldTable().get(varname);
+ if((fd != null) && (fd.isStatic())) {
+ nn.setField(fd);
+ nn.setClassDesc(cd);
+ if (td!=null)
if (!typeutil.isSuperorType(td,nn.getType()))
- throw new Error("Field node returns "+nn.getType()+", but need "+td);
+ throw new Error("Field node returns "+nn.getType()+", but need "+td);
+ return;
+ } else if(fd != null) {
+ throw new Error("Name "+varname+" should not be used in " + md);
+ }
+ }
+ cd=getClass(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null), varname);
+ if(cd != null) {
+ // this is a class name
+ nn.setClassDesc(cd);
+ return;
+ } else {
+ throw new Error("Name "+varname+" undefined in: "+md);
+ }
}
+ }
+ if (d instanceof VarDescriptor) {
+ nn.setVar(d);
+ } else if (d instanceof FieldDescriptor) {
+ FieldDescriptor fd=(FieldDescriptor)d;
+ if (fd.getType().iswrapper()) {
+ String id=nd.getIdentifier();
+ NameDescriptor base=nd.getBase();
+ NameNode n=new NameNode(nn.getName());
+ n.setNumLine(nn.getNumLine());
+ n.setField(fd);
+ n.setVar((VarDescriptor)nametable.get("this")); /* Need a pointer to this */
+ FieldAccessNode fan=new FieldAccessNode(n,"value");
+ fan.setNumLine(n.getNumLine());
+ FieldDescriptor fdval=(FieldDescriptor) fd.getType().getClassDesc().getFieldTable().get("value");
+ fan.setField(fdval);
+ nn.setExpression(fan);
+ } else {
+ nn.setField(fd);
+ nn.setVar((VarDescriptor)nametable.get("this")); /* Need a pointer to this */
+ }
+ } else if (d instanceof TagVarDescriptor) {
+ nn.setVar(d);
+ } else throw new Error("Wrong type of descriptor");
+ if (td!=null)
+ if (!typeutil.isSuperorType(td,nn.getType()))
+ throw new Error("Field node returns "+nn.getType()+", but need "+td);
+ }
+ }
+
+ void checkOffsetNode(Descriptor md, SymbolTable nameTable, OffsetNode ofn, TypeDescriptor td) {
+ TypeDescriptor ltd=ofn.td;
+ checkTypeDescriptor(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null),ltd);
+
+ String fieldname = ofn.fieldname;
+ FieldDescriptor fd=null;
+ if (ltd.isArray()&&fieldname.equals("length")) {
+ fd=FieldDescriptor.arrayLength;
+ } else {
+ fd=(FieldDescriptor) ltd.getClassDesc().getFieldTable().get(fieldname);
}
- void checkAssignmentNode(Descriptor md, SymbolTable nametable, AssignmentNode an, TypeDescriptor td) {
- boolean postinc=true;
- if (an.getOperation().getBaseOp()==null||
- (an.getOperation().getBaseOp().getOp()!=Operation.POSTINC&&
- an.getOperation().getBaseOp().getOp()!=Operation.POSTDEC))
- postinc=false;
-
- if (!postinc)
- checkExpressionNode(md, nametable, an.getSrc() ,td);
- //TODO: Need check on validity of operation here
- if (!((an.getDest() instanceof FieldAccessNode)||
- (an.getDest() instanceof ArrayAccessNode)||
- (an.getDest() instanceof NameNode)))
- throw new Error("Bad lside in "+an.printNode(0));
- checkExpressionNode(md, nametable, an.getDest(), null);
-
- /* We want parameter variables to tasks to be immutable */
- if (md instanceof TaskDescriptor) {
- if (an.getDest() instanceof NameNode) {
- NameNode nn=(NameNode)an.getDest();
- if (nn.getVar()!=null) {
- if (((TaskDescriptor)md).getParameterTable().contains(nn.getVar().getSymbol()))
- throw new Error("Can't modify parameter "+nn.getVar()+ " to task "+td.getSymbol());
- }
- }
+ ofn.setField(fd);
+ checkField(ltd.getClassDesc(), fd);
+
+ if (fd==null)
+ throw new Error("Unknown field "+fieldname + " in "+ofn.printNode(1)+" in "+md);
+
+ if (td!=null) {
+ if (!typeutil.isSuperorType(td, ofn.getType())) {
+ System.out.println(td);
+ System.out.println(ofn.getType());
+ throw new Error("Type of rside not compatible with type of lside"+ofn.printNode(0));
+ }
+ }
+ }
+
+
+ void checkTertiaryNode(Descriptor md, SymbolTable nametable, TertiaryNode tn, TypeDescriptor td) {
+ checkExpressionNode(md, nametable, tn.getCond(), new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ checkExpressionNode(md, nametable, tn.getTrueExpr(), td);
+ checkExpressionNode(md, nametable, tn.getFalseExpr(), td);
+ }
+
+ void checkInstanceOfNode(Descriptor md, SymbolTable nametable, InstanceOfNode tn, TypeDescriptor td) {
+ if (td!=null&&!td.isBoolean())
+ throw new Error("Expecting type "+td+"for instanceof expression");
+
+ checkTypeDescriptor(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null), tn.getExprType());
+ checkExpressionNode(md, nametable, tn.getExpr(), null);
+ }
+
+ void checkArrayInitializerNode(Descriptor md, SymbolTable nametable, ArrayInitializerNode ain, TypeDescriptor td) {
+ Vector<TypeDescriptor> vec_type = new Vector<TypeDescriptor>();
+ for( int i = 0; i < ain.numVarInitializers(); ++i ) {
+ checkExpressionNode(md, nametable, ain.getVarInitializer(i), td==null?td:td.dereference());
+ vec_type.add(ain.getVarInitializer(i).getType());
+ }
+ // descide the type of this variableInitializerNode
+ TypeDescriptor out_type = vec_type.elementAt(0);
+ for(int i = 1; i < vec_type.size(); i++) {
+ TypeDescriptor tmp_type = vec_type.elementAt(i);
+ if(out_type == null) {
+ if(tmp_type != null) {
+ out_type = tmp_type;
+ }
+ } else if(out_type.isNull()) {
+ if(!tmp_type.isNull() ) {
+ if(!tmp_type.isArray()) {
+ throw new Error("Error: mixed type in var initializer list");
+ } else {
+ out_type = tmp_type;
+ }
+ }
+ } else if(out_type.isArray()) {
+ if(tmp_type.isArray()) {
+ if(tmp_type.getArrayCount() > out_type.getArrayCount()) {
+ out_type = tmp_type;
+ }
+ } else if((tmp_type != null) && (!tmp_type.isNull())) {
+ throw new Error("Error: mixed type in var initializer list");
}
-
- if (!postinc&&!typeutil.isSuperorType(an.getDest().getType(),an.getSrc().getType())) {
- throw new Error("Type of rside ("+an.getSrc().getType()+") not compatible with type of lside ("+an.getDest().getType()+")"+an.printNode(0));
+ } else if(out_type.isInt()) {
+ if(!tmp_type.isInt()) {
+ throw new Error("Error: mixed type in var initializer list");
+ }
+ } else if(out_type.isString()) {
+ if(!tmp_type.isString()) {
+ throw new Error("Error: mixed type in var initializer list");
+ }
+ }
+ }
+ if(out_type != null) {
+ out_type = out_type.makeArray(state);
+ //out_type.setStatic();
+ }
+ ain.setType(out_type);
+ }
+
+ void checkAssignmentNode(Descriptor md, SymbolTable nametable, AssignmentNode an, TypeDescriptor td) {
+ boolean postinc=true;
+ if (an.getOperation().getBaseOp()==null||
+ (an.getOperation().getBaseOp().getOp()!=Operation.POSTINC&&
+ an.getOperation().getBaseOp().getOp()!=Operation.POSTDEC))
+ postinc=false;
+ if (!postinc)
+ checkExpressionNode(md, nametable, an.getSrc(),td);
+ //TODO: Need check on validity of operation here
+ if (!((an.getDest() instanceof FieldAccessNode)||
+ (an.getDest() instanceof ArrayAccessNode)||
+ (an.getDest() instanceof NameNode)))
+ throw new Error("Bad lside in "+an.printNode(0));
+ checkExpressionNode(md, nametable, an.getDest(), null);
+
+ /* We want parameter variables to tasks to be immutable */
+ if (md instanceof TaskDescriptor) {
+ if (an.getDest() instanceof NameNode) {
+ NameNode nn=(NameNode)an.getDest();
+ if (nn.getVar()!=null) {
+ if (((TaskDescriptor)md).getParameterTable().contains(nn.getVar().getSymbol()))
+ throw new Error("Can't modify parameter "+nn.getVar()+ " to task "+td.getSymbol());
}
+ }
}
- void checkLoopNode(Descriptor md, SymbolTable nametable, LoopNode ln) {
- if (ln.getType()==LoopNode.WHILELOOP||ln.getType()==LoopNode.DOWHILELOOP) {
- checkExpressionNode(md, nametable, ln.getCondition(), new TypeDescriptor(TypeDescriptor.BOOLEAN));
- checkBlockNode(md, nametable, ln.getBody());
+ if (an.getDest().getType().isString()&&an.getOperation().getOp()==AssignOperation.PLUSEQ) {
+ //String add
+ ClassDescriptor stringcl=getClass(null, TypeUtil.StringClass);
+ TypeDescriptor stringtd=new TypeDescriptor(stringcl);
+ NameDescriptor nd=new NameDescriptor("String");
+ NameDescriptor valuend=new NameDescriptor(nd, "valueOf");
+
+ if (!(an.getSrc().getType().isString()&&(an.getSrc() instanceof OpNode))) {
+ MethodInvokeNode rightmin=new MethodInvokeNode(valuend);
+ rightmin.setNumLine(an.getSrc().getNumLine());
+ rightmin.addArgument(an.getSrc());
+ an.right=rightmin;
+ checkExpressionNode(md, nametable, an.getSrc(), null);
+ }
+ }
+
+ if (!postinc&&!typeutil.isSuperorType(an.getDest().getType(),an.getSrc().getType())) {
+ TypeDescriptor dt = an.getDest().getType();
+ TypeDescriptor st = an.getSrc().getType();
+ if(an.getSrc().kind() == Kind.ArrayInitializerNode) {
+ if(dt.getArrayCount() != st.getArrayCount()) {
+ throw new Error("Type of rside ("+an.getSrc().getType().toPrettyString()+") not compatible with type of lside ("+an.getDest().getType().toPrettyString()+")"+an.printNode(0));
} else {
- //For loop case
- /* Link in the initializer naming environment */
- BlockNode bn=ln.getInitializer();
- bn.getVarTable().setParent(nametable);
- for(int i=0;i<bn.size();i++) {
- BlockStatementNode bsn=bn.get(i);
- checkBlockStatementNode(md, bn.getVarTable(),bsn);
- }
- //check the condition
- checkExpressionNode(md, bn.getVarTable(), ln.getCondition(), new TypeDescriptor(TypeDescriptor.BOOLEAN));
- checkBlockNode(md, bn.getVarTable(), ln.getBody());
- checkBlockNode(md, bn.getVarTable(), ln.getUpdate());
+ do {
+ dt = dt.dereference();
+ st = st.dereference();
+ } while(dt.isArray());
+ if((st.isByte() || st.isShort() || st.isChar() || st.isInt())
+ && (dt.isByte() || dt.isShort() || dt.isChar() || dt.isInt() || dt.isLong())) {
+ return;
+ } else {
+ throw new Error("Type of rside ("+an.getSrc().getType().toPrettyString()+") not compatible with type of lside ("+an.getDest().getType().toPrettyString()+")"+an.printNode(0));
+ }
}
+ } else {
+ Long l = an.getSrc().evaluate();
+ if((st.isByte() || st.isShort() || st.isChar() || st.isInt())
+ && (l != null)
+ && (dt.isByte() || dt.isShort() || dt.isChar() || dt.isInt() || dt.isLong())) {
+ long lnvalue = l.longValue();
+ if((dt.isByte() && ((lnvalue > 127) || (lnvalue < -128)))
+ || (dt.isShort() && ((lnvalue > 32767) || (lnvalue < -32768)))
+ || (dt.isChar() && ((lnvalue > 65535) || (lnvalue < 0)))
+ || (dt.isInt() && ((lnvalue > 2147483647) || (lnvalue < -2147483648)))
+ || (dt.isLong() && ((lnvalue > 9223372036854775807L) || (lnvalue < -9223372036854775808L)))) {
+ throw new Error("Type of rside ("+an.getSrc().getType().toPrettyString()+") not compatible with type of lside ("+an.getDest().getType().toPrettyString()+")"+an.printNode(0));
+ }
+ } else {
+ throw new Error("Type of rside ("+an.getSrc().getType().toPrettyString()+") not compatible with type of lside ("+an.getDest().getType().toPrettyString()+")"+an.printNode(0));
+ }
+ }
+ }
+ }
+
+ void checkLoopNode(Descriptor md, SymbolTable nametable, LoopNode ln) {
+ loopstack.push(ln);
+ if (ln.getType()==LoopNode.WHILELOOP||ln.getType()==LoopNode.DOWHILELOOP) {
+ checkExpressionNode(md, nametable, ln.getCondition(), new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ checkBlockNode(md, nametable, ln.getBody());
+ } else {
+ //For loop case
+ /* Link in the initializer naming environment */
+ BlockNode bn=ln.getInitializer();
+ bn.getVarTable().setParent(nametable);
+ for(int i=0; i<bn.size(); i++) {
+ BlockStatementNode bsn=bn.get(i);
+ checkBlockStatementNode(md, bn.getVarTable(),bsn);
+ }
+ //check the condition
+ checkExpressionNode(md, bn.getVarTable(), ln.getCondition(), new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ checkBlockNode(md, bn.getVarTable(), ln.getBody());
+ checkBlockNode(md, bn.getVarTable(), ln.getUpdate());
}
+ loopstack.pop();
+ }
- void checkCreateObjectNode(Descriptor md, SymbolTable nametable, CreateObjectNode con, TypeDescriptor td) {
- TypeDescriptor[] tdarray=new TypeDescriptor[con.numArgs()];
- for(int i=0;i<con.numArgs();i++) {
- ExpressionNode en=con.getArg(i);
- checkExpressionNode(md,nametable,en,null);
- tdarray[i]=en.getType();
- }
+ void checkCreateObjectNode(Descriptor md, SymbolTable nametable, CreateObjectNode con,
+ TypeDescriptor td) {
+ TypeDescriptor[] tdarray = new TypeDescriptor[con.numArgs()];
+ for (int i = 0; i < con.numArgs(); i++) {
+ ExpressionNode en = con.getArg(i);
+ checkExpressionNode(md, nametable, en, null);
+ tdarray[i] = en.getType();
+ }
- TypeDescriptor typetolookin=con.getType();
- checkTypeDescriptor(typetolookin);
-
- /* Check flag effects */
- if (con.getFlagEffects()!=null) {
- FlagEffects fe=con.getFlagEffects();
- ClassDescriptor cd=typetolookin.getClassDesc();
-
- for(int j=0;j<fe.numEffects();j++) {
- FlagEffect flag=fe.getEffect(j);
- String name=flag.getName();
- FlagDescriptor flag_d=(FlagDescriptor)cd.getFlagTable().get(name);
- //Make sure the flag is declared
- if (flag_d==null)
- throw new Error("Flag descriptor "+name+" undefined in class: "+cd.getSymbol());
- flag.setFlag(flag_d);
- }
- }
+ TypeDescriptor typetolookin = con.getType();
+ checkTypeDescriptor(((md instanceof MethodDescriptor)?((MethodDescriptor)md).getClassDesc():null), typetolookin);
+ if (td != null && !typeutil.isSuperorType(td, typetolookin))
+ throw new Error(typetolookin + " isn't a " + td);
- if ((!typetolookin.isClass())&&(!typetolookin.isArray()))
- throw new Error("Can't allocate primitive type:"+con.printNode(0));
-
- if (!typetolookin.isArray()) {
- //Array's don't need constructor calls
- ClassDescriptor classtolookin=typetolookin.getClassDesc();
- System.out.println("Looking for "+typetolookin.getSymbol());
- System.out.println(classtolookin.getMethodTable());
-
- Set methoddescriptorset=classtolookin.getMethodTable().getSet(typetolookin.getSymbol());
- MethodDescriptor bestmd=null;
- NextMethod:
- for(Iterator methodit=methoddescriptorset.iterator();methodit.hasNext();) {
- MethodDescriptor currmd=(MethodDescriptor)methodit.next();
- /* Need correct number of parameters */
- System.out.println("Examining: "+currmd);
- if (con.numArgs()!=currmd.numParameters())
- continue;
- for(int i=0;i<con.numArgs();i++) {
- if (!typeutil.isSuperorType(currmd.getParamType(i),tdarray[i]))
- continue NextMethod;
- }
- /* Method okay so far */
- if (bestmd==null)
- bestmd=currmd;
- else {
- if (isMoreSpecific(currmd,bestmd)) {
- bestmd=currmd;
- } else if (!isMoreSpecific(bestmd, currmd))
- throw new Error("No method is most specific");
-
- /* Is this more specific than bestmd */
- }
- }
- if (bestmd==null)
- throw new Error("No method found for "+con.printNode(0));
- con.setConstructor(bestmd);
+ /* Check Array Initializers */
+ if ((con.getArrayInitializer() != null)) {
+ checkArrayInitializerNode(md, nametable, con.getArrayInitializer(), td);
+ }
+
+ /* Check flag effects */
+ if (con.getFlagEffects() != null) {
+ FlagEffects fe = con.getFlagEffects();
+ ClassDescriptor cd = typetolookin.getClassDesc();
+
+ for (int j = 0; j < fe.numEffects(); j++) {
+ FlagEffect flag = fe.getEffect(j);
+ String name = flag.getName();
+ FlagDescriptor flag_d = (FlagDescriptor) cd.getFlagTable().get(name);
+ // Make sure the flag is declared
+ if (flag_d == null)
+ throw new Error("Flag descriptor " + name + " undefined in class: " + cd.getSymbol());
+ if (flag_d.getExternal())
+ throw new Error("Attempting to modify external flag: " + name);
+ flag.setFlag(flag_d);
+ }
+ for (int j = 0; j < fe.numTagEffects(); j++) {
+ TagEffect tag = fe.getTagEffect(j);
+ String name = tag.getName();
+
+ Descriptor d = (Descriptor) nametable.get(name);
+ if (d == null)
+ throw new Error("Tag descriptor " + name + " undeclared");
+ else if (!(d instanceof TagVarDescriptor))
+ throw new Error(name + " is not a tag descriptor");
+ tag.setTag((TagVarDescriptor) d);
+ }
+ }
+
+ if ((!typetolookin.isClass()) && (!typetolookin.isArray()))
+ throw new Error("Can't allocate primitive type:" + con.printNode(0));
+
+ if (!typetolookin.isArray()) {
+ // Array's don't need constructor calls
+ ClassDescriptor classtolookin = typetolookin.getClassDesc();
+ checkClass(classtolookin, INIT);
+
+ Set methoddescriptorset = classtolookin.getMethodTable().getSet(typetolookin.getSymbol());
+ MethodDescriptor bestmd = null;
+NextMethod: for (Iterator methodit = methoddescriptorset.iterator(); methodit.hasNext(); ) {
+ MethodDescriptor currmd = (MethodDescriptor) methodit.next();
+ /* Need correct number of parameters */
+ if (con.numArgs() != currmd.numParameters())
+ continue;
+ for (int i = 0; i < con.numArgs(); i++) {
+ if (!typeutil.isSuperorType(currmd.getParamType(i), tdarray[i]))
+ continue NextMethod;
}
+ /* Local allocations can't call global allocator */
+ if (!con.isGlobal() && currmd.isGlobal())
+ continue;
+
+ /* Method okay so far */
+ if (bestmd == null)
+ bestmd = currmd;
+ else {
+ if (typeutil.isMoreSpecific(currmd, bestmd)) {
+ bestmd = currmd;
+ } else if (con.isGlobal() && match(currmd, bestmd)) {
+ if (currmd.isGlobal() && !bestmd.isGlobal())
+ bestmd = currmd;
+ else if (currmd.isGlobal() && bestmd.isGlobal())
+ throw new Error();
+ } else if (!typeutil.isMoreSpecific(bestmd, currmd)) {
+ throw new Error("No method is most specific:" + bestmd + " and " + currmd);
+ }
+
+ /* Is this more specific than bestmd */
+ }
+ }
+ if (bestmd == null)
+ throw new Error("No method found for " + con.printNode(0) + " in " + md);
+ con.setConstructor(bestmd);
}
+ }
- /** Check to see if md1 is more specific than md2... Informally
- if md2 could always be called given the arguments passed into
- md1 */
+ /** Check to see if md1 is the same specificity as md2.*/
- boolean isMoreSpecific(MethodDescriptor md1, MethodDescriptor md2) {
- /* Checks if md1 is more specific than md2 */
- if (md1.numParameters()!=md2.numParameters())
- throw new Error();
- for(int i=0;i<md1.numParameters();i++) {
- if (!typeutil.isSuperorType(md2.getParamType(i), md1.getParamType(i)))
- return false;
- }
- if (!typeutil.isSuperorType(md2.getReturnType(), md1.getReturnType()))
- return false;
- return true;
+ boolean match(MethodDescriptor md1, MethodDescriptor md2) {
+ /* Checks if md1 is more specific than md2 */
+ if (md1.numParameters()!=md2.numParameters())
+ throw new Error();
+ for(int i=0; i<md1.numParameters(); i++) {
+ if (!md2.getParamType(i).equals(md1.getParamType(i)))
+ return false;
}
+ if (!md2.getReturnType().equals(md1.getReturnType()))
+ return false;
+
+ if (!md2.getClassDesc().equals(md1.getClassDesc()))
+ return false;
+
+ return true;
+ }
+
+
- ExpressionNode translateNameDescriptorintoExpression(NameDescriptor nd) {
- String id=nd.getIdentifier();
- NameDescriptor base=nd.getBase();
- if (base==null)
- return new NameNode(nd);
- else
- return new FieldAccessNode(translateNameDescriptorintoExpression(base),id);
+ ExpressionNode translateNameDescriptorintoExpression(NameDescriptor nd, int numLine) {
+ String id=nd.getIdentifier();
+ NameDescriptor base=nd.getBase();
+ if (base==null) {
+ NameNode nn=new NameNode(nd);
+ nn.setNumLine(numLine);
+ return nn;
+ } else {
+ FieldAccessNode fan=new FieldAccessNode(translateNameDescriptorintoExpression(base,numLine),id);
+ fan.setNumLine(numLine);
+ return fan;
}
+ }
- void checkMethodInvokeNode(Descriptor md, SymbolTable nametable, MethodInvokeNode min, TypeDescriptor td) {
- /*Typecheck subexpressions
- and get types for expressions*/
+ void checkMethodInvokeNode(Descriptor md, SymbolTable nametable, MethodInvokeNode min, TypeDescriptor td) {
+ /*Typecheck subexpressions
+ and get types for expressions*/
- TypeDescriptor[] tdarray=new TypeDescriptor[min.numArgs()];
- for(int i=0;i<min.numArgs();i++) {
- ExpressionNode en=min.getArg(i);
- checkExpressionNode(md,nametable,en,null);
- tdarray[i]=en.getType();
+ boolean isstatic = false;
+ if((md instanceof MethodDescriptor) && ((MethodDescriptor)md).isStatic()) {
+ isstatic = true;
+ }
+ TypeDescriptor[] tdarray=new TypeDescriptor[min.numArgs()];
+ for(int i=0; i<min.numArgs(); i++) {
+ ExpressionNode en=min.getArg(i);
+ checkExpressionNode(md,nametable,en,null);
+ tdarray[i]=en.getType();
+ if(en.getType().isClass() && en.getType().getClassDesc().isEnum()) {
+ tdarray[i] = new TypeDescriptor(TypeDescriptor.INT);
+ }
+ }
+ TypeDescriptor typetolookin=null;
+ if (min.getExpression()!=null) {
+ checkExpressionNode(md,nametable,min.getExpression(),null);
+ typetolookin=min.getExpression().getType();
+ //if (typetolookin==null)
+ //throw new Error(md+" has null return type");
+
+ } else if (min.getBaseName()!=null) {
+ String rootname=min.getBaseName().getRoot();
+ if (rootname.equals("super")) {
+ ClassDescriptor supercd=((MethodDescriptor)md).getClassDesc().getSuperDesc();
+ typetolookin=new TypeDescriptor(supercd);
+ min.setSuper();
+ } else if (rootname.equals("this")) {
+ if(isstatic) {
+ throw new Error("use this object in static method md = "+ md.toString());
}
- TypeDescriptor typetolookin=null;
- if (min.getExpression()!=null) {
- checkExpressionNode(md,nametable,min.getExpression(),null);
- typetolookin=min.getExpression().getType();
- } else if (min.getBaseName()!=null) {
- String rootname=min.getBaseName().getRoot();
- if (nametable.get(rootname)!=null) {
- //we have an expression
- min.setExpression(translateNameDescriptorintoExpression(min.getBaseName()));
- checkExpressionNode(md, nametable, min.getExpression(), null);
- typetolookin=min.getExpression().getType();
- } else {
- //we have a type
- ClassDescriptor cd=typeutil.getClass(min.getBaseName().getSymbol());
- if (cd==null)
- throw new Error(min.getBaseName()+" undefined");
- typetolookin=new TypeDescriptor(cd);
- }
- } else if (md instanceof MethodDescriptor) {
- typetolookin=new TypeDescriptor(((MethodDescriptor)md).getClassDesc());
+ ClassDescriptor cd=((MethodDescriptor)md).getClassDesc();
+ typetolookin=new TypeDescriptor(cd);
+ } else if (nametable.get(rootname)!=null) {
+ //we have an expression
+ min.setExpression(translateNameDescriptorintoExpression(min.getBaseName(),min.getNumLine()));
+ checkExpressionNode(md, nametable, min.getExpression(), null);
+ typetolookin=min.getExpression().getType();
+ } else {
+ if(!min.getBaseName().getSymbol().equals("System.out")) {
+ ExpressionNode nn = translateNameDescriptorintoExpression(min.getBaseName(),min.getNumLine());
+ checkExpressionNode(md, nametable, nn, null);
+ typetolookin = nn.getType();
+ if(!((nn.kind()== Kind.NameNode) && (((NameNode)nn).getField() == null)
+ && (((NameNode)nn).getVar() == null) && (((NameNode)nn).getExpression() == null))) {
+ // this is not a pure class name, need to add to
+ min.setExpression(nn);
+ }
} else {
- /* If this a task descriptor we throw an error at this point */
- throw new Error("Unknown method call to "+min.getMethodName()+"in task"+md.getSymbol());
- }
- if (!typetolookin.isClass())
- throw new Error();
- ClassDescriptor classtolookin=typetolookin.getClassDesc();
- System.out.println("Method name="+min.getMethodName());
- Set methoddescriptorset=classtolookin.getMethodTable().getSet(min.getMethodName());
- MethodDescriptor bestmd=null;
- NextMethod:
- for(Iterator methodit=methoddescriptorset.iterator();methodit.hasNext();) {
- MethodDescriptor currmd=(MethodDescriptor)methodit.next();
- /* Need correct number of parameters */
- if (min.numArgs()!=currmd.numParameters())
- continue;
- for(int i=0;i<min.numArgs();i++) {
- if (!typeutil.isSuperorType(currmd.getParamType(i),tdarray[i]))
- continue NextMethod;
- }
- /* Method okay so far */
- if (bestmd==null)
- bestmd=currmd;
- else {
- if (isMoreSpecific(currmd,bestmd)) {
- bestmd=currmd;
- } else if (!isMoreSpecific(bestmd, currmd))
- throw new Error("No method is most specific");
-
- /* Is this more specific than bestmd */
- }
- }
- if (bestmd==null)
- throw new Error("No method found for :"+min.printNode(0));
- min.setMethod(bestmd);
- /* Check whether we need to set this parameter to implied this */
- if (!bestmd.isStatic()) {
- if (min.getExpression()==null) {
- ExpressionNode en=new NameNode(new NameDescriptor("this"));
- min.setExpression(en);
- checkExpressionNode(md, nametable, min.getExpression(), null);
- }
+ //we have a type
+ ClassDescriptor cd = null;
+ //if (min.getBaseName().getSymbol().equals("System.out"))
+ cd=getClass(null, "System");
+ /*else {
+ cd=getClass(min.getBaseName().getSymbol());
+ }*/
+ if (cd==null)
+ throw new Error("md = "+ md.toString()+ " "+min.getBaseName()+" undefined");
+ typetolookin=new TypeDescriptor(cd);
}
+ }
+ } else if ((md instanceof MethodDescriptor)&&min.getMethodName().equals("super")) {
+ ClassDescriptor supercd=((MethodDescriptor)md).getClassDesc().getSuperDesc();
+ min.methodid=supercd.getSymbol();
+ typetolookin=new TypeDescriptor(supercd);
+ } else if (md instanceof MethodDescriptor) {
+ typetolookin=new TypeDescriptor(((MethodDescriptor)md).getClassDesc());
+ } else {
+ /* If this a task descriptor we throw an error at this point */
+ throw new Error("Unknown method call to "+min.getMethodName()+"in task"+md.getSymbol());
+ }
+ if (!typetolookin.isClass())
+ throw new Error("Error with method call to "+min.getMethodName());
+ ClassDescriptor classtolookin=typetolookin.getClassDesc();
+ checkClass(classtolookin, INIT);
+ //System.out.println("Method name="+min.getMethodName());
+
+ Set methoddescriptorset=classtolookin.getMethodTable().getSet(min.getMethodName());
+ MethodDescriptor bestmd=null;
+NextMethod:
+ for(Iterator methodit=methoddescriptorset.iterator(); methodit.hasNext(); ) {
+ MethodDescriptor currmd=(MethodDescriptor)methodit.next();
+ /* Need correct number of parameters */
+ if (min.numArgs()!=currmd.numParameters())
+ continue;
+ for(int i=0; i<min.numArgs(); i++) {
+ if (!typeutil.isSuperorType(currmd.getParamType(i),tdarray[i]))
+ if(((!tdarray[i].isArray() &&(tdarray[i].isInt() || tdarray[i].isLong()))
+ && currmd.getParamType(i).isClass() && currmd.getParamType(i).getClassDesc().getSymbol().equals("Object"))) {
+ // primitive parameters vs object
+ } else {
+ continue NextMethod;
+ }
+ }
+ /* Method okay so far */
+ if (bestmd==null)
+ bestmd=currmd;
+ else {
+ if (typeutil.isMoreSpecific(currmd,bestmd)) {
+ bestmd=currmd;
+ } else if (!typeutil.isMoreSpecific(bestmd, currmd))
+ throw new Error("No method is most specific:"+bestmd+" and "+currmd);
+
+ /* Is this more specific than bestmd */
+ }
+ }
+ if (bestmd==null)
+ throw new Error("No method found for :"+min.printNode(0)+" in class: " + classtolookin+" in "+md);
+ min.setMethod(bestmd);
+
+ if ((td!=null)&&(min.getType()!=null)&&!typeutil.isSuperorType(td, min.getType()))
+ throw new Error(min.getType()+ " is not equal to or a subclass of "+td);
+ /* Check whether we need to set this parameter to implied this */
+ if (!isstatic && !bestmd.isStatic()) {
+ if (min.getExpression()==null) {
+ ExpressionNode en=new NameNode(new NameDescriptor("this"));
+ min.setExpression(en);
+ checkExpressionNode(md, nametable, min.getExpression(), null);
+ }
+ }
+ /* Check if we need to wrap primitive paratmeters to objects */
+ for(int i=0; i<min.numArgs(); i++) {
+ if(!tdarray[i].isArray() && (tdarray[i].isInt() || tdarray[i].isLong())
+ && min.getMethod().getParamType(i).isClass() && min.getMethod().getParamType(i).getClassDesc().getSymbol().equals("Object")) {
+ // Shall wrap this primitive parameter as a object
+ ExpressionNode exp = min.getArg(i);
+ TypeDescriptor ptd = null;
+ NameDescriptor nd=null;
+ if(exp.getType().isInt()) {
+ nd = new NameDescriptor("Integer");
+ ptd = state.getTypeDescriptor(nd);
+ } else if(exp.getType().isLong()) {
+ nd = new NameDescriptor("Long");
+ ptd = state.getTypeDescriptor(nd);
+ }
+ boolean isglobal = false;
+ String disjointId = null;
+ CreateObjectNode con=new CreateObjectNode(ptd, isglobal, disjointId);
+ con.addArgument(exp);
+ checkExpressionNode(md, nametable, con, null);
+ min.setArgument(con, i);
+ }
}
+ }
+
+
+ void checkOpNode(Descriptor md, SymbolTable nametable, OpNode on, TypeDescriptor td) {
+ checkExpressionNode(md, nametable, on.getLeft(), null);
+ if (on.getRight()!=null)
+ checkExpressionNode(md, nametable, on.getRight(), null);
+ TypeDescriptor ltd=on.getLeft().getType();
+ TypeDescriptor rtd=on.getRight()!=null?on.getRight().getType():null;
+ TypeDescriptor lefttype=null;
+ TypeDescriptor righttype=null;
+ Operation op=on.getOp();
+
+ switch(op.getOp()) {
+ case Operation.LOGIC_OR:
+ case Operation.LOGIC_AND:
+ if (!(rtd.isBoolean()))
+ throw new Error();
+ on.setRightType(rtd);
+
+ case Operation.LOGIC_NOT:
+ if (!(ltd.isBoolean()))
+ throw new Error();
+ //no promotion
+ on.setLeftType(ltd);
+ on.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ break;
- void checkOpNode(Descriptor md, SymbolTable nametable, OpNode on, TypeDescriptor td) {
- checkExpressionNode(md, nametable, on.getLeft(), null);
- if (on.getRight()!=null)
- checkExpressionNode(md, nametable, on.getRight(), null);
- TypeDescriptor ltd=on.getLeft().getType();
- TypeDescriptor rtd=on.getRight()!=null?on.getRight().getType():null;
- TypeDescriptor lefttype=null;
- TypeDescriptor righttype=null;
- Operation op=on.getOp();
-
- switch(op.getOp()) {
- case Operation.LOGIC_OR:
- case Operation.LOGIC_AND:
- if (!(ltd.isBoolean()&&rtd.isBoolean()))
- throw new Error();
- //no promotion
- on.setLeftType(ltd);
- on.setRightType(rtd);
- on.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
- break;
-
- case Operation.BIT_OR:
- case Operation.BIT_XOR:
- case Operation.BIT_AND:
- // 5.6.2 Binary Numeric Promotion
- //TODO unboxing of reference objects
- if (ltd.isDouble()||rtd.isDouble())
- throw new Error();
- else if (ltd.isFloat()||rtd.isFloat())
- throw new Error();
- else if (ltd.isLong()||rtd.isLong())
- lefttype=new TypeDescriptor(TypeDescriptor.LONG);
- else
- lefttype=new TypeDescriptor(TypeDescriptor.INT);
- righttype=lefttype;
-
- on.setLeftType(lefttype);
- on.setRightType(righttype);
- on.setType(lefttype);
- break;
-
- case Operation.EQUAL:
- case Operation.NOTEQUAL:
- // 5.6.2 Binary Numeric Promotion
- //TODO unboxing of reference objects
- if (ltd.isBoolean()||rtd.isBoolean()) {
- if (!(ltd.isBoolean()&&rtd.isBoolean()))
- throw new Error();
- righttype=lefttype=new TypeDescriptor(TypeDescriptor.BOOLEAN);
- } else if (ltd.isPtr()||rtd.isPtr()) {
- if (!(ltd.isPtr()&&rtd.isPtr()))
- throw new Error();
- righttype=rtd;
- lefttype=ltd;
- } else if (ltd.isDouble()||rtd.isDouble())
- righttype=lefttype=new TypeDescriptor(TypeDescriptor.DOUBLE);
- else if (ltd.isFloat()||rtd.isFloat())
- righttype=lefttype=new TypeDescriptor(TypeDescriptor.FLOAT);
- else if (ltd.isLong()||rtd.isLong())
- righttype=lefttype=new TypeDescriptor(TypeDescriptor.LONG);
- else
- righttype=lefttype=new TypeDescriptor(TypeDescriptor.INT);
-
- on.setLeftType(lefttype);
- on.setRightType(righttype);
- on.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
- break;
-
-
-
- case Operation.LT:
- case Operation.GT:
- case Operation.LTE:
- case Operation.GTE:
- // 5.6.2 Binary Numeric Promotion
- //TODO unboxing of reference objects
- if (!ltd.isNumber()||!rtd.isNumber())
- throw new Error();
-
- if (ltd.isDouble()||rtd.isDouble())
- lefttype=new TypeDescriptor(TypeDescriptor.DOUBLE);
- else if (ltd.isFloat()||rtd.isFloat())
- lefttype=new TypeDescriptor(TypeDescriptor.FLOAT);
- else if (ltd.isLong()||rtd.isLong())
- lefttype=new TypeDescriptor(TypeDescriptor.LONG);
- else
- lefttype=new TypeDescriptor(TypeDescriptor.INT);
- righttype=lefttype;
- on.setLeftType(lefttype);
- on.setRightType(righttype);
- on.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
- break;
-
- case Operation.ADD:
- //TODO: Need special case for strings eventually
-
-
- case Operation.SUB:
- case Operation.MULT:
- case Operation.DIV:
- case Operation.MOD:
- // 5.6.2 Binary Numeric Promotion
- //TODO unboxing of reference objects
- if (!ltd.isNumber()||!rtd.isNumber())
- throw new Error("Error in "+on.printNode(0));
-
- if (ltd.isDouble()||rtd.isDouble())
- lefttype=new TypeDescriptor(TypeDescriptor.DOUBLE);
- else if (ltd.isFloat()||rtd.isFloat())
- lefttype=new TypeDescriptor(TypeDescriptor.FLOAT);
- else if (ltd.isLong()||rtd.isLong())
- lefttype=new TypeDescriptor(TypeDescriptor.LONG);
- else
- lefttype=new TypeDescriptor(TypeDescriptor.INT);
- righttype=lefttype;
- on.setLeftType(lefttype);
- on.setRightType(righttype);
- on.setType(lefttype);
- break;
-
- case Operation.LEFTSHIFT:
- case Operation.RIGHTSHIFT:
- if (!rtd.isIntegerType())
- throw new Error();
- //5.6.1 Unary Numeric Promotion
- if (rtd.isByte()||rtd.isShort()||rtd.isInt())
- righttype=new TypeDescriptor(TypeDescriptor.INT);
- else
- righttype=rtd;
-
- on.setRightType(righttype);
- if (!ltd.isIntegerType())
- throw new Error();
- case Operation.UNARYPLUS:
- case Operation.UNARYMINUS:
- /* case Operation.POSTINC:
- case Operation.POSTDEC:
- case Operation.PREINC:
- case Operation.PREDEC:*/
- if (!ltd.isNumber())
- throw new Error();
- //5.6.1 Unary Numeric Promotion
- if (ltd.isByte()||ltd.isShort()||ltd.isInt())
- lefttype=new TypeDescriptor(TypeDescriptor.INT);
- else
- lefttype=ltd;
- on.setLeftType(lefttype);
- on.setType(lefttype);
- break;
- default:
+ case Operation.COMP:
+ // 5.6.2 Binary Numeric Promotion
+ //TODO unboxing of reference objects
+ if (ltd.isDouble())
+ throw new Error();
+ else if (ltd.isFloat())
+ throw new Error();
+ else if (ltd.isLong())
+ lefttype=new TypeDescriptor(TypeDescriptor.LONG);
+ else
+ lefttype=new TypeDescriptor(TypeDescriptor.INT);
+ on.setLeftType(lefttype);
+ on.setType(lefttype);
+ break;
+
+ case Operation.BIT_OR:
+ case Operation.BIT_XOR:
+ case Operation.BIT_AND:
+ // 5.6.2 Binary Numeric Promotion
+ //TODO unboxing of reference objects
+ if (ltd.isDouble()||rtd.isDouble())
+ throw new Error();
+ else if (ltd.isFloat()||rtd.isFloat())
+ throw new Error();
+ else if (ltd.isLong()||rtd.isLong())
+ lefttype=new TypeDescriptor(TypeDescriptor.LONG);
+ // 090205 hack for boolean
+ else if (ltd.isBoolean()||rtd.isBoolean())
+ lefttype=new TypeDescriptor(TypeDescriptor.BOOLEAN);
+ else
+ lefttype=new TypeDescriptor(TypeDescriptor.INT);
+ righttype=lefttype;
+
+ on.setLeftType(lefttype);
+ on.setRightType(righttype);
+ on.setType(lefttype);
+ break;
+
+ case Operation.ISAVAILABLE:
+ if (!(ltd.isPtr())) {
+ throw new Error("Can't use isavailable on non-pointers/non-parameters.");
+ }
+ lefttype=ltd;
+ on.setLeftType(lefttype);
+ on.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ break;
+
+ case Operation.EQUAL:
+ case Operation.NOTEQUAL:
+ // 5.6.2 Binary Numeric Promotion
+ //TODO unboxing of reference objects
+ if (ltd.isBoolean()||rtd.isBoolean()) {
+ if (!(ltd.isBoolean()&&rtd.isBoolean()))
+ throw new Error();
+ righttype=lefttype=new TypeDescriptor(TypeDescriptor.BOOLEAN);
+ } else if (ltd.isPtr()||rtd.isPtr()) {
+ if (!(ltd.isPtr()&&rtd.isPtr())) {
+ if(!rtd.isEnum()) {
throw new Error();
+ }
}
-
- if (td!=null)
- if (!typeutil.isSuperorType(td, on.getType())) {
- System.out.println(td);
- System.out.println(on.getType());
- throw new Error("Type of rside not compatible with type of lside"+on.printNode(0));
- }
+ righttype=rtd;
+ lefttype=ltd;
+ } else if (ltd.isDouble()||rtd.isDouble())
+ righttype=lefttype=new TypeDescriptor(TypeDescriptor.DOUBLE);
+ else if (ltd.isFloat()||rtd.isFloat())
+ righttype=lefttype=new TypeDescriptor(TypeDescriptor.FLOAT);
+ else if (ltd.isLong()||rtd.isLong())
+ righttype=lefttype=new TypeDescriptor(TypeDescriptor.LONG);
+ else
+ righttype=lefttype=new TypeDescriptor(TypeDescriptor.INT);
+
+ on.setLeftType(lefttype);
+ on.setRightType(righttype);
+ on.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ break;
+
+
+
+ case Operation.LT:
+ case Operation.GT:
+ case Operation.LTE:
+ case Operation.GTE:
+ // 5.6.2 Binary Numeric Promotion
+ //TODO unboxing of reference objects
+ if (!ltd.isNumber()||!rtd.isNumber()) {
+ if (!ltd.isNumber())
+ throw new Error("Leftside is not number"+on.printNode(0)+"type="+ltd.toPrettyString());
+ if (!rtd.isNumber())
+ throw new Error("Rightside is not number"+on.printNode(0));
+ }
+
+ if (ltd.isDouble()||rtd.isDouble())
+ lefttype=new TypeDescriptor(TypeDescriptor.DOUBLE);
+ else if (ltd.isFloat()||rtd.isFloat())
+ lefttype=new TypeDescriptor(TypeDescriptor.FLOAT);
+ else if (ltd.isLong()||rtd.isLong())
+ lefttype=new TypeDescriptor(TypeDescriptor.LONG);
+ else
+ lefttype=new TypeDescriptor(TypeDescriptor.INT);
+ righttype=lefttype;
+ on.setLeftType(lefttype);
+ on.setRightType(righttype);
+ on.setType(new TypeDescriptor(TypeDescriptor.BOOLEAN));
+ break;
+
+ case Operation.ADD:
+ if (ltd.isString()||rtd.isString()) {
+ ClassDescriptor stringcl=getClass(null, TypeUtil.StringClass);
+ TypeDescriptor stringtd=new TypeDescriptor(stringcl);
+ NameDescriptor nd=new NameDescriptor("String");
+ NameDescriptor valuend=new NameDescriptor(nd, "valueOf");
+ if (!(ltd.isString()&&(on.getLeft() instanceof OpNode))) {
+ MethodInvokeNode leftmin=new MethodInvokeNode(valuend);
+ leftmin.setNumLine(on.getLeft().getNumLine());
+ leftmin.addArgument(on.getLeft());
+ on.left=leftmin;
+ checkExpressionNode(md, nametable, on.getLeft(), null);
+ }
+
+ if (!(rtd.isString()&&(on.getRight() instanceof OpNode))) {
+ MethodInvokeNode rightmin=new MethodInvokeNode(valuend);
+ rightmin.setNumLine(on.getRight().getNumLine());
+ rightmin.addArgument(on.getRight());
+ on.right=rightmin;
+ checkExpressionNode(md, nametable, on.getRight(), null);
+ }
+
+ on.setLeftType(stringtd);
+ on.setRightType(stringtd);
+ on.setType(stringtd);
+ break;
+ }
+
+ case Operation.SUB:
+ case Operation.MULT:
+ case Operation.DIV:
+ case Operation.MOD:
+ // 5.6.2 Binary Numeric Promotion
+ //TODO unboxing of reference objects
+ if (ltd.isArray()||rtd.isArray()||!ltd.isNumber()||!rtd.isNumber())
+ throw new Error("Error in "+on.printNode(0));
+
+ if (ltd.isDouble()||rtd.isDouble())
+ lefttype=new TypeDescriptor(TypeDescriptor.DOUBLE);
+ else if (ltd.isFloat()||rtd.isFloat())
+ lefttype=new TypeDescriptor(TypeDescriptor.FLOAT);
+ else if (ltd.isLong()||rtd.isLong())
+ lefttype=new TypeDescriptor(TypeDescriptor.LONG);
+ else
+ lefttype=new TypeDescriptor(TypeDescriptor.INT);
+ righttype=lefttype;
+ on.setLeftType(lefttype);
+ on.setRightType(righttype);
+ on.setType(lefttype);
+ break;
+
+ case Operation.LEFTSHIFT:
+ case Operation.RIGHTSHIFT:
+ case Operation.URIGHTSHIFT:
+ if (!rtd.isIntegerType())
+ throw new Error();
+ //5.6.1 Unary Numeric Promotion
+ if (rtd.isByte()||rtd.isShort()||rtd.isInt())
+ righttype=new TypeDescriptor(TypeDescriptor.INT);
+ else
+ righttype=rtd;
+
+ on.setRightType(righttype);
+ if (!ltd.isIntegerType())
+ throw new Error();
+
+ case Operation.UNARYPLUS:
+ case Operation.UNARYMINUS:
+ /* case Operation.POSTINC:
+ case Operation.POSTDEC:
+ case Operation.PREINC:
+ case Operation.PREDEC:*/
+ if (!ltd.isNumber())
+ throw new Error();
+ //5.6.1 Unary Numeric Promotion
+ if (ltd.isByte()||ltd.isShort()||ltd.isInt())
+ lefttype=new TypeDescriptor(TypeDescriptor.INT);
+ else
+ lefttype=ltd;
+ on.setLeftType(lefttype);
+ on.setType(lefttype);
+ break;
+
+ default:
+ throw new Error(op.toString());
}
+
+ if (td!=null)
+ if (!typeutil.isSuperorType(td, on.getType())) {
+ System.out.println(td);
+ System.out.println(on.getType());
+ throw new Error("Type of rside not compatible with type of lside"+on.printNode(0));
+ }
+ }
+
}
projects / IRC.git / blobdiff