/** Normal field binding did not work, try to bind to a field of the delegate receiver. */
public TypeBinding reportError(BlockScope scope) {
if (this.binding instanceof ProblemFieldBinding) {
scope.problemReporter().invalidField(this, (FieldBinding) this.binding);
} else if (this.binding instanceof ProblemReferenceBinding) {
scope.problemReporter().invalidType(this, (TypeBinding) this.binding);
} else {
scope.problemReporter().unresolvableReference(this, this.binding);
}
return null;
}
public FlowInfo analyseCode(
BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo, boolean valueRequired) {
// determine the rank until which we now we do not need any actual value for the field access
int otherBindingsCount = this.otherBindings == null ? 0 : this.otherBindings.length;
boolean needValue = otherBindingsCount == 0 ? valueRequired : !this.otherBindings[0].isStatic();
boolean complyTo14 =
currentScope.compilerOptions().complianceLevel >= ClassFileConstants.JDK1_4;
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.FIELD: // reading a field
break;
case Binding.LOCAL: // reading a local variable
LocalVariableBinding localBinding;
if (!flowInfo.isDefinitelyAssigned(localBinding = (LocalVariableBinding) this.binding)) {
if (localBinding.declaringScope instanceof CompilationUnitScope)
currentScope.problemReporter().uninitializedGlobalVariable(localBinding, this);
else currentScope.problemReporter().uninitializedLocalVariable(localBinding, this);
}
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) {
localBinding.useFlag = LocalVariableBinding.USED;
} else if (localBinding.useFlag == LocalVariableBinding.UNUSED) {
localBinding.useFlag = LocalVariableBinding.FAKE_USED;
}
checkNPE(currentScope, flowContext, flowInfo, true);
}
if (needValue) {
manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo);
// only for first binding (if value needed only)
}
if (this.otherBindings != null) {
for (int i = 0; i < otherBindingsCount; i++) {
needValue =
i < otherBindingsCount - 1 ? !this.otherBindings[i + 1].isStatic() : valueRequired;
if (needValue || complyTo14) {
TypeBinding lastReceiverType = getGenericCast(i);
if (lastReceiverType == null) {
if (i == 0) {
lastReceiverType = ((VariableBinding) this.binding).type;
} else {
lastReceiverType = this.otherBindings[i - 1].type;
}
}
}
}
}
return flowInfo;
}
public TypeBinding resolveType(BlockScope scope) {
// field and/or local are done before type lookups
// the only available value for the restrictiveFlag BEFORE
// the TC is Flag_Type Flag_LocalField and Flag_TypeLocalField
this.actualReceiverType = scope.enclosingReceiverType();
this.constant = Constant.NotAConstant;
if ((
/*this.codegenBinding =*/ this.binding =
scope.getBinding(
this.tokens, this.bits & ASTNode.RestrictiveFlagMASK, this, true /*resolve*/))
.isValidBinding()) {
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.VARIABLE: // ============only variable===========
case Binding.TYPE | Binding.VARIABLE:
if (this.binding instanceof LocalVariableBinding) {
this.bits &= ~ASTNode.RestrictiveFlagMASK; // clear bits
this.bits |= Binding.LOCAL;
return this.resolvedType = getOtherFieldBindings(scope);
}
if (this.binding instanceof FieldBinding) {
FieldBinding fieldBinding = (FieldBinding) this.binding;
MethodScope methodScope = scope.methodScope();
// check for forward references
if (this.indexOfFirstFieldBinding == 1
&& methodScope.enclosingSourceType() == fieldBinding.original().declaringClass
&& methodScope.lastVisibleFieldID >= 0
&& fieldBinding.id >= methodScope.lastVisibleFieldID
&& (!fieldBinding.isStatic() || methodScope.isStatic)) {
scope.problemReporter().forwardReference(this, 0, methodScope.enclosingSourceType());
}
this.bits &= ~ASTNode.RestrictiveFlagMASK; // clear bits
this.bits |= Binding.FIELD;
// // check for deprecated receiver type
// // deprecation check for receiver type if not first token
// if (indexOfFirstFieldBinding > 1) {
// if (isTypeUseDeprecated(this.actualReceiverType, scope))
// scope.problemReporter().deprecatedType(this.actualReceiverType, this);
// }
return this.resolvedType = getOtherFieldBindings(scope);
}
// thus it was a type
this.bits &= ~ASTNode.RestrictiveFlagMASK; // clear bits
this.bits |= Binding.TYPE;
case Binding.TYPE: // =============only type ==============
TypeBinding type = (TypeBinding) this.binding;
// if (isTypeUseDeprecated(type, scope))
// scope.problemReporter().deprecatedType(type, this);
return this.resolvedType = type;
}
}
// ========error cases===============
return this.resolvedType = this.reportError(scope);
}
public void resolve(BlockScope scope) {
MethodScope methodScope = scope.methodScope();
if (methodScope == null) {
/* return statement outside of a method */
scope.problemReporter().cannotReturnOutsideFunction(this);
return;
}
MethodBinding methodBinding = null;
TypeBinding methodType =
(methodScope.referenceContext instanceof AbstractMethodDeclaration)
? ((methodBinding = ((AbstractMethodDeclaration) methodScope.referenceContext).binding)
== null
? null
: methodBinding.returnType)
: TypeBinding.ANY;
TypeBinding expressionType;
if (this.expression == null) {
if (methodType != null && !methodType.isAnyType())
scope.problemReporter().shouldReturn(methodType, this);
return;
}
this.expression.setExpectedType(methodType); // needed in case of generic method invocation
if ((expressionType = this.expression.resolveType(scope)) == null) return;
if (methodType == null) return;
if (methodType
!= expressionType) // must call before computeConversion() and typeMismatchError()
scope.compilationUnitScope().recordTypeConversion(methodType, expressionType);
if (this.expression.isConstantValueOfTypeAssignableToType(expressionType, methodType)
|| expressionType.isCompatibleWith(methodType)) {
return;
}
if (methodBinding != null && !methodBinding.isConstructor())
scope.problemReporter().typeMismatchError(expressionType, methodType, this.expression);
}
/** Check and/or redirect the field access to the delegate receiver if any */
public TypeBinding checkFieldAccess(BlockScope scope) {
FieldBinding fieldBinding = (FieldBinding) this.binding;
MethodScope methodScope = scope.methodScope();
// check for forward references
if (this.indexOfFirstFieldBinding == 1
&& methodScope.enclosingSourceType() == fieldBinding.original().declaringClass
&& methodScope.lastVisibleFieldID >= 0
&& fieldBinding.id >= methodScope.lastVisibleFieldID
&& (!fieldBinding.isStatic() || methodScope.isStatic)) {
scope.problemReporter().forwardReference(this, 0, methodScope.enclosingSourceType());
}
this.bits &= ~ASTNode.RestrictiveFlagMASK; // clear bits
this.bits |= Binding.FIELD;
return getOtherFieldBindings(scope);
}
public TypeBinding resolveType(BlockScope scope) {
// Propagate the type checking to the arguments, and check if the constructor is defined.
constant = Constant.NotAConstant;
if (this.member != null) {
this.resolvedType = this.member.resolveForAllocation(scope, this);
if (this.resolvedType != null && !this.resolvedType.isValidBinding()) {
scope.problemReporter().invalidType(this, this.resolvedType);
}
} else if (this.type == null) {
// initialization of an enum constant
this.resolvedType = scope.enclosingReceiverType();
} else {
this.resolvedType = this.type.resolveType(scope, true /* check bounds*/);
}
// will check for null after args are resolved
// buffering the arguments' types
boolean argsContainCast = false;
TypeBinding[] argumentTypes = Binding.NO_PARAMETERS;
if (arguments != null) {
boolean argHasError = false;
int length = arguments.length;
argumentTypes = new TypeBinding[length];
for (int i = 0; i < length; i++) {
Expression argument = this.arguments[i];
if ((argumentTypes[i] = argument.resolveType(scope)) == null) {
argHasError = true;
argumentTypes[i] = TypeBinding.UNKNOWN;
}
}
if (argHasError) {
// if (this.resolvedType instanceof ReferenceBinding) {
// // record a best guess, for clients who need hint about possible contructor match
// TypeBinding[] pseudoArgs = new TypeBinding[length];
// for (int i = length; --i >= 0;)
// pseudoArgs[i] = argumentTypes[i] == null ? this.resolvedType : argumentTypes[i]; //
// replace args with errors with receiver
// this.binding = scope.findMethod((ReferenceBinding) this.resolvedType,
// TypeConstants.INIT, pseudoArgs, this);
// }
// return this.resolvedType;
}
}
if (this.resolvedType == null
|| this.resolvedType.isAnyType()
|| this.resolvedType instanceof ProblemReferenceBinding) {
this.binding =
new ProblemMethodBinding(
TypeConstants.INIT, Binding.NO_PARAMETERS, ProblemReasons.NotFound);
this.resolvedType = TypeBinding.UNKNOWN;
return this.resolvedType;
}
if (!this.resolvedType.isValidBinding()) return null;
if (this.resolvedType instanceof ReferenceBinding) {
ReferenceBinding allocationType = (ReferenceBinding) this.resolvedType;
if (!(binding = scope.getConstructor(allocationType, argumentTypes, this)).isValidBinding()) {
if (binding.declaringClass == null) binding.declaringClass = allocationType;
scope.problemReporter().invalidConstructor(this, binding);
return this.resolvedType;
}
if (argumentTypes.length != binding.parameters.length)
scope.problemReporter().wrongNumberOfArguments(this, binding);
if (isMethodUseDeprecated(binding, scope, true))
scope.problemReporter().deprecatedMethod(binding, this);
checkInvocationArguments(
scope,
null,
allocationType,
this.binding,
this.arguments,
argumentTypes,
argsContainCast,
this);
}
return this.resolvedType;
}
public FlowInfo analyseAssignment(
BlockScope currentScope,
FlowContext flowContext,
FlowInfo flowInfo,
Assignment assignment,
boolean isCompound) {
// determine the rank until which we now we do not need any actual value for the field access
int otherBindingsCount = this.otherBindings == null ? 0 : this.otherBindings.length;
boolean needValue = otherBindingsCount == 0 || !this.otherBindings[0].isStatic();
boolean complyTo14 =
currentScope.compilerOptions().complianceLevel >= ClassFileConstants.JDK1_4;
FieldBinding lastFieldBinding = null;
switch (this.bits & ASTNode.RestrictiveFlagMASK) {
case Binding.FIELD: // reading a field
lastFieldBinding = (FieldBinding) this.binding;
break;
case Binding.LOCAL:
// first binding is a local variable
LocalVariableBinding localBinding;
if (!flowInfo.isDefinitelyAssigned(localBinding = (LocalVariableBinding) this.binding)) {
currentScope.problemReporter().uninitializedLocalVariable(localBinding, this);
}
if ((flowInfo.tagBits & FlowInfo.UNREACHABLE) == 0) {
localBinding.useFlag = LocalVariableBinding.USED;
} else if (localBinding.useFlag == LocalVariableBinding.UNUSED) {
localBinding.useFlag = LocalVariableBinding.FAKE_USED;
}
checkNPE(currentScope, flowContext, flowInfo, true);
}
if (needValue) {
manageEnclosingInstanceAccessIfNecessary(currentScope, flowInfo);
// only for first binding
}
// all intermediate field accesses are read accesses
if (this.otherBindings != null) {
for (int i = 0; i < otherBindingsCount - 1; i++) {
lastFieldBinding = this.otherBindings[i];
needValue = !this.otherBindings[i + 1].isStatic();
}
lastFieldBinding = this.otherBindings[otherBindingsCount - 1];
}
if (isCompound) {
TypeBinding lastReceiverType;
switch (otherBindingsCount) {
case 0:
lastReceiverType = this.actualReceiverType;
break;
case 1:
lastReceiverType = ((VariableBinding) this.binding).type;
break;
default:
lastReceiverType = this.otherBindings[otherBindingsCount - 2].type;
break;
}
}
if (assignment.expression != null) {
flowInfo =
assignment
.expression
.analyseCode(currentScope, flowContext, flowInfo)
.unconditionalInits();
}
// equivalent to valuesRequired[maxOtherBindings]
TypeBinding lastReceiverType;
switch (otherBindingsCount) {
case 0:
lastReceiverType = this.actualReceiverType;
break;
case 1:
lastReceiverType = ((VariableBinding) this.binding).type;
break;
default:
lastReceiverType = this.otherBindings[otherBindingsCount - 2].type;
break;
}
return flowInfo;
}
public TypeBinding getOtherFieldBindings(BlockScope scope) {
// At this point restrictiveFlag may ONLY have two potential value : FIELD LOCAL (i.e cast
// <<(VariableBinding) binding>> is valid)
int length = this.tokens.length;
FieldBinding field;
if ((this.bits & Binding.FIELD) != 0) {
field = (FieldBinding) this.binding;
if (!field.isStatic()) {
// must check for the static status....
if (this.indexOfFirstFieldBinding
> 1 // accessing to a field using a type as "receiver" is allowed only with static
// field
|| scope.methodScope()
.isStatic) { // the field is the first token of the qualified reference....
scope.problemReporter().staticFieldAccessToNonStaticVariable(this, field);
return null;
}
} else {
// indirect static reference ?
if (this.indexOfFirstFieldBinding > 1
&& field.declaringClass != this.actualReceiverType
&& field.declaringClass.canBeSeenBy(scope)) {
scope.problemReporter().indirectAccessToStaticField(this, field);
}
}
// only last field is actually a write access if any
if (isFieldUseDeprecated(
field,
scope,
(this.bits & ASTNode.IsStrictlyAssigned) != 0 && this.indexOfFirstFieldBinding == length))
scope.problemReporter().deprecatedField(field, this);
} else {
field = null;
}
TypeBinding type = ((VariableBinding) this.binding).type;
int index = this.indexOfFirstFieldBinding;
if (index == length) { // restrictiveFlag == FIELD
// perform capture conversion if read access
return type;
}
// allocation of the fieldBindings array and its respective constants
int otherBindingsLength = length - index;
this.otherCodegenBindings = this.otherBindings = new FieldBinding[otherBindingsLength];
this.otherDepths = new int[otherBindingsLength];
// save first depth, since will be updated by visibility checks of other bindings
int firstDepth = (this.bits & ASTNode.DepthMASK) >> ASTNode.DepthSHIFT;
// iteration on each field
while (index < length) {
char[] token = this.tokens[index];
if (type == null) return null; // could not resolve type prior to this point
this.bits &= ~ASTNode.DepthMASK; // flush previous depth if any
FieldBinding previousField = field;
field = scope.getField(type, token, this);
int place = index - this.indexOfFirstFieldBinding;
this.otherBindings[place] = field;
this.otherDepths[place] = (this.bits & ASTNode.DepthMASK) >> ASTNode.DepthSHIFT;
if (field.isValidBinding()) {
// set generic cast of for previous field (if any)
if (previousField != null) {
TypeBinding fieldReceiverType = type;
TypeBinding receiverErasure = type;
if (receiverErasure instanceof ReferenceBinding) {
if (receiverErasure.findSuperTypeWithSameErasure(field.declaringClass) == null) {
fieldReceiverType =
field.declaringClass; // handle indirect inheritance thru variable secondary bound
}
}
FieldBinding originalBinding = previousField.original();
}
// only last field is actually a write access if any
if (isFieldUseDeprecated(
field, scope, (this.bits & ASTNode.IsStrictlyAssigned) != 0 && index + 1 == length)) {
scope.problemReporter().deprecatedField(field, this);
}
if (field.isStatic()) {
// static field accessed through receiver? legal but unoptimal (optional warning)
scope.problemReporter().nonStaticAccessToStaticField(this, field);
// indirect static reference ?
if (field.declaringClass != type) {
scope.problemReporter().indirectAccessToStaticField(this, field);
}
}
type = field.type;
index++;
} else {
this.constant = Constant.NotAConstant; // don't fill other constants slots...
scope.problemReporter().invalidField(this, field, index, type);
setDepth(firstDepth);
return null;
}
}
setDepth(firstDepth);
type = (this.otherBindings[otherBindingsLength - 1]).type;
// perform capture conversion if read access
return type;
}
public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
if (this.expression != null) {
flowInfo = this.expression.analyseCode(currentScope, flowContext, flowInfo);
}
// compute the return sequence (running the finally blocks)
FlowContext traversedContext = flowContext;
int subCount = 0;
boolean saveValueNeeded = false;
boolean hasValueToSave =
this.expression != null
&& this.expression.constant == Constant.NotAConstant
&& !(this.expression instanceof NullLiteral);
do {
SubRoutineStatement sub;
if ((sub = traversedContext.subroutine()) != null) {
if (this.subroutines == null) {
this.subroutines = new SubRoutineStatement[5];
}
if (subCount == this.subroutines.length) {
System.arraycopy(
this.subroutines,
0,
(this.subroutines = new SubRoutineStatement[subCount * 2]),
0,
subCount); // grow
}
this.subroutines[subCount++] = sub;
if (sub.isSubRoutineEscaping()) {
saveValueNeeded = false;
this.bits |= ASTNode.IsAnySubRoutineEscaping;
break;
}
}
traversedContext.recordReturnFrom(flowInfo.unconditionalInits());
if (traversedContext instanceof InsideSubRoutineFlowContext) {
ASTNode node = traversedContext.associatedNode;
if (node instanceof TryStatement) {
TryStatement tryStatement = (TryStatement) node;
flowInfo.addInitializationsFrom(tryStatement.subRoutineInits); // collect inits
if (hasValueToSave) {
if (this.saveValueVariable == null) { // closest subroutine secret variable is used
prepareSaveValueLocation(tryStatement);
}
saveValueNeeded = true;
}
}
} else if (traversedContext instanceof InitializationFlowContext) {
currentScope.problemReporter().cannotReturnOutsideFunction(this);
return FlowInfo.DEAD_END;
}
} while ((traversedContext = traversedContext.parent) != null);
// resize subroutines
if ((this.subroutines != null) && (subCount != this.subroutines.length)) {
System.arraycopy(
this.subroutines, 0, (this.subroutines = new SubRoutineStatement[subCount]), 0, subCount);
}
// secret local variable for return value (note that this can only occur in a real method)
if (saveValueNeeded) {
if (this.saveValueVariable != null) {
this.saveValueVariable.useFlag = LocalVariableBinding.USED;
}
} else {
this.saveValueVariable = null;
if (this.expression != null && this.expression.resolvedType == TypeBinding.BOOLEAN) {
this.expression.bits |= ASTNode.IsReturnedValue;
}
}
return FlowInfo.DEAD_END;
}