/*******************************************************************************
- * Copyright (c) 2000, 2001, 2002 International Business Machines Corp. and others.
+ * Copyright (c) 2000, 2003 IBM Corporation and others.
* All rights reserved. This program and the accompanying materials
- * are made available under the terms of the Common Public License v0.5
+ * are made available under the terms of the Common Public License v1.0
* which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v05.html
+ * http://www.eclipse.org/legal/cpl-v10.html
*
* Contributors:
* IBM Corporation - initial API and implementation
- ******************************************************************************/
+ *******************************************************************************/
package net.sourceforge.phpdt.internal.compiler.ast;
-import net.sourceforge.phpdt.internal.compiler.IAbstractSyntaxTreeVisitor;
-import net.sourceforge.phpdt.internal.compiler.impl.*;
-import net.sourceforge.phpdt.internal.compiler.codegen.*;
-import net.sourceforge.phpdt.internal.compiler.flow.*;
-import net.sourceforge.phpdt.internal.compiler.lookup.*;
+import net.sourceforge.phpdt.internal.compiler.ASTVisitor;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowContext;
+import net.sourceforge.phpdt.internal.compiler.flow.FlowInfo;
+import net.sourceforge.phpdt.internal.compiler.impl.Constant;
+import net.sourceforge.phpdt.internal.compiler.lookup.BindingIds;
+import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
+import net.sourceforge.phpdt.internal.compiler.lookup.FieldBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.InvocationSite;
+import net.sourceforge.phpdt.internal.compiler.lookup.MethodBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.ReferenceBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.Scope;
+import net.sourceforge.phpdt.internal.compiler.lookup.SourceTypeBinding;
+import net.sourceforge.phpdt.internal.compiler.lookup.TypeBinding;
public class FieldReference extends Reference implements InvocationSite {
token = source;
nameSourcePosition = pos;
//by default the position are the one of the field (not true for super access)
- sourceStart = (int) (pos >>> 32);
- sourceEnd = (int) (pos & 0x00000000FFFFFFFFL);
+// sourceStart = (int) (pos >>> 32);
+// sourceEnd = (int) (pos & 0x00000000FFFFFFFFL);
+ sourceStart = (int) pos;
+ sourceEnd = sourceStart + source.length;
bits |= BindingIds.FIELD;
}
// compound assignment extra work
if (isCompound) { // check the variable part is initialized if blank final
- if (binding.isFinal()
+ if (binding.isBlankFinal()
&& receiver.isThis()
&& currentScope.allowBlankFinalFieldAssignment(binding)
&& (!flowInfo.isDefinitelyAssigned(binding))) {
}
manageSyntheticReadAccessIfNecessary(currentScope);
}
+ flowInfo =
+ receiver
+ .analyseCode(currentScope, flowContext, flowInfo, !binding.isStatic())
+ .unconditionalInits();
if (assignment.expression != null) {
flowInfo =
assignment
.analyseCode(currentScope, flowContext, flowInfo)
.unconditionalInits();
}
- flowInfo =
- receiver
- .analyseCode(currentScope, flowContext, flowInfo, !binding.isStatic())
- .unconditionalInits();
manageSyntheticWriteAccessIfNecessary(currentScope);
// check if assigning a final field
if (binding.isFinal()) {
// in a context where it can be assigned?
- if (receiver.isThis()
+ if (binding.isBlankFinal()
+ && !isCompound
+ && receiver.isThis()
&& !(receiver instanceof QualifiedThisReference)
+ && ((receiver.bits & ParenthesizedMASK) == 0) // (this).x is forbidden
&& currentScope.allowBlankFinalFieldAssignment(binding)) {
if (flowInfo.isPotentiallyAssigned(binding)) {
currentScope.problemReporter().duplicateInitializationOfBlankFinalField(
binding,
this);
+ } else {
+ flowContext.recordSettingFinal(binding, this);
}
flowInfo.markAsDefinitelyAssigned(binding);
- flowContext.recordSettingFinal(binding, this);
} else {
- // assigning a final field outside an initializer or constructor
+ // assigning a final field outside an initializer or constructor or wrong reference
currentScope.problemReporter().cannotAssignToFinalField(binding, this);
}
}
return binding;
}
- public void generateAssignment(
- BlockScope currentScope,
- CodeStream codeStream,
- Assignment assignment,
- boolean valueRequired) {
-
- receiver.generateCode(
- currentScope,
- codeStream,
- !this.codegenBinding.isStatic());
- assignment.expression.generateCode(currentScope, codeStream, true);
- fieldStore(
- codeStream,
- this.codegenBinding,
- syntheticWriteAccessor,
- valueRequired);
- if (valueRequired) {
- codeStream.generateImplicitConversion(assignment.implicitConversion);
- }
- }
+// public void generateAssignment(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Assignment assignment,
+// boolean valueRequired) {
+//
+// receiver.generateCode(
+// currentScope,
+// codeStream,
+// !this.codegenBinding.isStatic());
+// assignment.expression.generateCode(currentScope, codeStream, true);
+// fieldStore(
+// codeStream,
+// this.codegenBinding,
+// syntheticWriteAccessor,
+// valueRequired);
+// if (valueRequired) {
+// codeStream.generateImplicitConversion(assignment.implicitConversion);
+// }
+// }
/**
* Field reference code generation
*
- * @param currentScope org.eclipse.jdt.internal.compiler.lookup.BlockScope
- * @param codeStream org.eclipse.jdt.internal.compiler.codegen.CodeStream
+ * @param currentScope net.sourceforge.phpdt.internal.compiler.lookup.BlockScope
+ * @param codeStream net.sourceforge.phpdt.internal.compiler.codegen.CodeStream
* @param valueRequired boolean
*/
- public void generateCode(
- BlockScope currentScope,
- CodeStream codeStream,
- boolean valueRequired) {
-
- int pc = codeStream.position;
- if (constant != NotAConstant) {
- if (valueRequired) {
- codeStream.generateConstant(constant, implicitConversion);
- }
- } else {
- boolean isStatic = this.codegenBinding.isStatic();
- receiver.generateCode(
- currentScope,
- codeStream,
- valueRequired && (!isStatic) && (this.codegenBinding.constant == NotAConstant));
- if (valueRequired) {
- if (this.codegenBinding.constant == NotAConstant) {
- if (this.codegenBinding.declaringClass == null) { // array length
- codeStream.arraylength();
- } else {
- if (syntheticReadAccessor == null) {
- if (isStatic) {
- codeStream.getstatic(this.codegenBinding);
- } else {
- codeStream.getfield(this.codegenBinding);
- }
- } else {
- codeStream.invokestatic(syntheticReadAccessor);
- }
- }
- codeStream.generateImplicitConversion(implicitConversion);
- } else {
- codeStream.generateConstant(this.codegenBinding.constant, implicitConversion);
- }
- }
- }
- codeStream.recordPositionsFrom(pc, this.sourceStart);
- }
-
- public void generateCompoundAssignment(
- BlockScope currentScope,
- CodeStream codeStream,
- Expression expression,
- int operator,
- int assignmentImplicitConversion,
- boolean valueRequired) {
-
- boolean isStatic;
- receiver.generateCode(
- currentScope,
- codeStream,
- !(isStatic = this.codegenBinding.isStatic()));
- if (isStatic) {
- if (syntheticReadAccessor == null) {
- codeStream.getstatic(this.codegenBinding);
- } else {
- codeStream.invokestatic(syntheticReadAccessor);
- }
- } else {
- codeStream.dup();
- if (syntheticReadAccessor == null) {
- codeStream.getfield(this.codegenBinding);
- } else {
- codeStream.invokestatic(syntheticReadAccessor);
- }
- }
- int operationTypeID;
- if ((operationTypeID = implicitConversion >> 4) == T_String) {
- codeStream.generateStringAppend(currentScope, null, expression);
- } else {
- // promote the array reference to the suitable operation type
- codeStream.generateImplicitConversion(implicitConversion);
- // generate the increment value (will by itself be promoted to the operation value)
- if (expression == IntLiteral.One) { // prefix operation
- codeStream.generateConstant(expression.constant, implicitConversion);
- } else {
- expression.generateCode(currentScope, codeStream, true);
- }
- // perform the operation
- codeStream.sendOperator(operator, operationTypeID);
- // cast the value back to the array reference type
- codeStream.generateImplicitConversion(assignmentImplicitConversion);
- }
- fieldStore(
- codeStream,
- this.codegenBinding,
- syntheticWriteAccessor,
- valueRequired);
- }
-
- public void generatePostIncrement(
- BlockScope currentScope,
- CodeStream codeStream,
- CompoundAssignment postIncrement,
- boolean valueRequired) {
-
- boolean isStatic;
- receiver.generateCode(
- currentScope,
- codeStream,
- !(isStatic = this.codegenBinding.isStatic()));
- if (isStatic) {
- if (syntheticReadAccessor == null) {
- codeStream.getstatic(this.codegenBinding);
- } else {
- codeStream.invokestatic(syntheticReadAccessor);
- }
- } else {
- codeStream.dup();
- if (syntheticReadAccessor == null) {
- codeStream.getfield(this.codegenBinding);
- } else {
- codeStream.invokestatic(syntheticReadAccessor);
- }
- }
- if (valueRequired) {
- if (isStatic) {
- if ((this.codegenBinding.type == LongBinding)
- || (this.codegenBinding.type == DoubleBinding)) {
- codeStream.dup2();
- } else {
- codeStream.dup();
- }
- } else { // Stack: [owner][old field value] ---> [old field value][owner][old field value]
- if ((this.codegenBinding.type == LongBinding)
- || (this.codegenBinding.type == DoubleBinding)) {
- codeStream.dup2_x1();
- } else {
- codeStream.dup_x1();
- }
- }
- }
- codeStream.generateConstant(
- postIncrement.expression.constant,
- implicitConversion);
- codeStream.sendOperator(postIncrement.operator, this.codegenBinding.type.id);
- codeStream.generateImplicitConversion(
- postIncrement.assignmentImplicitConversion);
- fieldStore(codeStream, this.codegenBinding, syntheticWriteAccessor, false);
- }
+// public void generateCode(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// boolean valueRequired) {
+//
+// int pc = codeStream.position;
+// if (constant != NotAConstant) {
+// if (valueRequired) {
+// codeStream.generateConstant(constant, implicitConversion);
+// }
+// } else {
+// boolean isStatic = this.codegenBinding.isStatic();
+// receiver.generateCode(currentScope, codeStream, !isStatic);
+// if (valueRequired) {
+// if (this.codegenBinding.constant == NotAConstant) {
+// if (this.codegenBinding.declaringClass == null) { // array length
+// codeStream.arraylength();
+// } else {
+// if (syntheticReadAccessor == null) {
+// if (isStatic) {
+// codeStream.getstatic(this.codegenBinding);
+// } else {
+// codeStream.getfield(this.codegenBinding);
+// }
+// } else {
+// codeStream.invokestatic(syntheticReadAccessor);
+// }
+// }
+// codeStream.generateImplicitConversion(implicitConversion);
+// } else {
+// if (!isStatic) {
+// codeStream.invokeObjectGetClass(); // perform null check
+// codeStream.pop();
+// }
+// codeStream.generateConstant(this.codegenBinding.constant, implicitConversion);
+// }
+// } else {
+// if (!isStatic){
+// codeStream.invokeObjectGetClass(); // perform null check
+// codeStream.pop();
+// }
+// }
+// }
+// codeStream.recordPositionsFrom(pc, this.sourceStart);
+// }
+//
+// public void generateCompoundAssignment(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// Expression expression,
+// int operator,
+// int assignmentImplicitConversion,
+// boolean valueRequired) {
+//
+// boolean isStatic;
+// receiver.generateCode(
+// currentScope,
+// codeStream,
+// !(isStatic = this.codegenBinding.isStatic()));
+// if (isStatic) {
+// if (syntheticReadAccessor == null) {
+// codeStream.getstatic(this.codegenBinding);
+// } else {
+// codeStream.invokestatic(syntheticReadAccessor);
+// }
+// } else {
+// codeStream.dup();
+// if (syntheticReadAccessor == null) {
+// codeStream.getfield(this.codegenBinding);
+// } else {
+// codeStream.invokestatic(syntheticReadAccessor);
+// }
+// }
+// int operationTypeID;
+// if ((operationTypeID = implicitConversion >> 4) == T_String) {
+// codeStream.generateStringAppend(currentScope, null, expression);
+// } else {
+// // promote the array reference to the suitable operation type
+// codeStream.generateImplicitConversion(implicitConversion);
+// // generate the increment value (will by itself be promoted to the operation value)
+// if (expression == IntLiteral.One) { // prefix operation
+// codeStream.generateConstant(expression.constant, implicitConversion);
+// } else {
+// expression.generateCode(currentScope, codeStream, true);
+// }
+// // perform the operation
+// codeStream.sendOperator(operator, operationTypeID);
+// // cast the value back to the array reference type
+// codeStream.generateImplicitConversion(assignmentImplicitConversion);
+// }
+// fieldStore(
+// codeStream,
+// this.codegenBinding,
+// syntheticWriteAccessor,
+// valueRequired);
+// }
+//
+// public void generatePostIncrement(
+// BlockScope currentScope,
+// CodeStream codeStream,
+// CompoundAssignment postIncrement,
+// boolean valueRequired) {
+//
+// boolean isStatic;
+// receiver.generateCode(
+// currentScope,
+// codeStream,
+// !(isStatic = this.codegenBinding.isStatic()));
+// if (isStatic) {
+// if (syntheticReadAccessor == null) {
+// codeStream.getstatic(this.codegenBinding);
+// } else {
+// codeStream.invokestatic(syntheticReadAccessor);
+// }
+// } else {
+// codeStream.dup();
+// if (syntheticReadAccessor == null) {
+// codeStream.getfield(this.codegenBinding);
+// } else {
+// codeStream.invokestatic(syntheticReadAccessor);
+// }
+// }
+// if (valueRequired) {
+// if (isStatic) {
+// if ((this.codegenBinding.type == LongBinding)
+// || (this.codegenBinding.type == DoubleBinding)) {
+// codeStream.dup2();
+// } else {
+// codeStream.dup();
+// }
+// } else { // Stack: [owner][old field value] ---> [old field value][owner][old field value]
+// if ((this.codegenBinding.type == LongBinding)
+// || (this.codegenBinding.type == DoubleBinding)) {
+// codeStream.dup2_x1();
+// } else {
+// codeStream.dup_x1();
+// }
+// }
+// }
+// codeStream.generateConstant(
+// postIncrement.expression.constant,
+// implicitConversion);
+// codeStream.sendOperator(postIncrement.operator, this.codegenBinding.type.id);
+// codeStream.generateImplicitConversion(
+// postIncrement.assignmentImplicitConversion);
+// fieldStore(codeStream, this.codegenBinding, syntheticWriteAccessor, false);
+// }
public static final Constant getConstantFor(
FieldBinding binding,
- boolean implicitReceiver,
Reference reference,
- Scope referenceScope,
- int indexInQualification) {
+ boolean isImplicit,
+ Scope referenceScope) {
//propagation of the constant.
//if ref==null then indexInQualification==0 AND implicitReceiver == false. This case is a
//degenerated case where a fake reference field (null)
//is associted to a real FieldBinding in order
- //to allow its constant computation using the regular path (i.e. find the fieldDeclaration
+ //to allow its constant computation using the regular path (in other words, find the fieldDeclaration
//and proceed to its type resolution). As implicitReceiver is false, no error reporting
//against ref will be used ==> no nullPointerException risk ....
return binding.constant = NotAConstant;
}
if (binding.constant != null) {
- if (indexInQualification == 0) {
- return binding.constant;
- }
- //see previous comment for the (sould-always-be) valid cast
- QualifiedNameReference qualifiedReference = (QualifiedNameReference) reference;
- if (indexInQualification == (qualifiedReference.indexOfFirstFieldBinding - 1)) {
+ if (isImplicit || (reference instanceof QualifiedNameReference
+ && binding == ((QualifiedNameReference)reference).binding)) {
return binding.constant;
}
return NotAConstant;
TypeDeclaration typeDecl = typeBinding.scope.referenceContext;
FieldDeclaration fieldDecl = typeDecl.declarationOf(binding);
- //what scope to use (depend on the staticness of the field binding)
- MethodScope fieldScope =
- binding.isStatic()
+ fieldDecl.resolve(binding.isStatic() //side effect on binding
? typeDecl.staticInitializerScope
- : typeDecl.initializerScope;
+ : typeDecl.initializerScope);
- if (implicitReceiver) { //Determine if the ref is legal in the current class of the field
- //i.e. not a forward reference .... (they are allowed when the receiver is explicit ! ... Please don't ask me why !...yet another java mystery...)
- if (fieldScope.fieldDeclarationIndex == MethodScope.NotInFieldDecl) {
- // no field is currently being analysed in typeDecl
- fieldDecl.resolve(fieldScope); //side effect on binding :-) ...
- return binding.constant;
- }
- //We are re-entering the same class fields analysing
- if ((reference != null)
- && (binding.declaringClass == referenceScope.enclosingSourceType()) // only complain for access inside same type
- && (binding.id > fieldScope.fieldDeclarationIndex)) {
- //forward reference. The declaration remains unresolved.
- referenceScope.problemReporter().forwardReference(reference, indexInQualification, typeBinding);
- return NotAConstant;
- }
- fieldDecl.resolve(fieldScope); //side effect on binding :-) ...
- return binding.constant;
- }
- //the field reference is explicity. It has to be a "simple" like field reference to get the
- //constant propagation. For example in Packahe.Type.field1.field2 , field1 may have its
- //constant having a propagation where field2 is always not propagating its
- if (indexInQualification == 0) {
- fieldDecl.resolve(fieldScope); //side effect on binding :-) ...
- return binding.constant;
- }
- // Side-effect on the field binding may not be propagated out for the qualified reference
- // unless it occurs in first place of the name sequence
- fieldDecl.resolve(fieldScope); //side effect on binding :-) ...
- //see previous comment for the cast that should always be valid
- QualifiedNameReference qualifiedReference = (QualifiedNameReference) reference;
- if (indexInQualification == (qualifiedReference.indexOfFirstFieldBinding - 1)) {
+ if (isImplicit || (reference instanceof QualifiedNameReference
+ && binding == ((QualifiedNameReference)reference).binding)) {
return binding.constant;
- } else {
- return NotAConstant;
}
+ return NotAConstant;
}
public boolean isSuperAccess() {
}
// if the binding declaring class is not visible, need special action
// for runtime compatibility on 1.2 VMs : change the declaring class of the binding
- // NOTE: from 1.4 on, field's declaring class is touched if any different from receiver type
- if (binding.declaringClass != this.receiverType
- && !this.receiverType.isArrayType()
- && binding.declaringClass != null // array.length
- && binding.constant == NotAConstant
- && ((currentScope.environment().options.complianceLevel >= CompilerOptions.JDK1_4
- && binding.declaringClass.id != T_Object)
- //no change for Object fields (in case there was)
- || !binding.declaringClass.canBeSeenBy(currentScope))) {
- this.codegenBinding =
- currentScope.enclosingSourceType().getUpdatedFieldBinding(
- binding,
- (ReferenceBinding) this.receiverType);
- }
+ // NOTE: from target 1.2 on, field's declaring class is touched if any different from receiver type
+// if (binding.declaringClass != this.receiverType
+// && !this.receiverType.isArrayType()
+// && binding.declaringClass != null // array.length
+// && binding.constant == NotAConstant
+// && ((currentScope.environment().options.targetJDK >= CompilerOptions.JDK1_2
+// && binding.declaringClass.id != T_Object)
+// //no change for Object fields (in case there was)
+// || !binding.declaringClass.canBeSeenBy(currentScope))) {
+// this.codegenBinding =
+// currentScope.enclosingSourceType().getUpdatedFieldBinding(
+// binding,
+// (ReferenceBinding) this.receiverType);
+// }
}
/*
}
// if the binding declaring class is not visible, need special action
// for runtime compatibility on 1.2 VMs : change the declaring class of the binding
- // NOTE: from 1.4 on, field's declaring class is touched if any different from receiver type
- if (binding.declaringClass != this.receiverType
- && !this.receiverType.isArrayType()
- && binding.declaringClass != null // array.length
- && binding.constant == NotAConstant
- && ((currentScope.environment().options.complianceLevel >= CompilerOptions.JDK1_4
- && binding.declaringClass.id != T_Object)
- //no change for Object fields (in case there was)
- || !binding.declaringClass.canBeSeenBy(currentScope))) {
- this.codegenBinding =
- currentScope.enclosingSourceType().getUpdatedFieldBinding(
- binding,
- (ReferenceBinding) this.receiverType);
- }
+ // NOTE: from target 1.2 on, field's declaring class is touched if any different from receiver type
+// if (binding.declaringClass != this.receiverType
+// && !this.receiverType.isArrayType()
+// && binding.declaringClass != null // array.length
+// && binding.constant == NotAConstant
+// && ((currentScope.environment().options.targetJDK >= CompilerOptions.JDK1_2
+// && binding.declaringClass.id != T_Object)
+// //no change for Object fields (in case there was)
+// || !binding.declaringClass.canBeSeenBy(currentScope))) {
+// this.codegenBinding =
+// currentScope.enclosingSourceType().getUpdatedFieldBinding(
+// binding,
+// (ReferenceBinding) this.receiverType);
+// }
}
public TypeBinding resolveType(BlockScope scope) {
if (isFieldUseDeprecated(binding, scope))
scope.problemReporter().deprecatedField(binding, this);
- // check for this.x in static is done in the resolution of the receiver
- constant =
- FieldReference.getConstantFor(
- binding,
- receiver == ThisReference.ThisImplicit,
- this,
- scope,
- 0);
- if (receiver != ThisReference.ThisImplicit)
+ boolean isImplicitThisRcv = receiver.isImplicitThis();
+ constant = FieldReference.getConstantFor(binding, this, isImplicitThisRcv, scope);
+ if (!isImplicitThisRcv) {
constant = NotAConstant;
-
- return binding.type;
+ }
+ if (binding.isStatic()) {
+ // static field accessed through receiver? legal but unoptimal (optional warning)
+ if (!(isImplicitThisRcv
+ || receiver.isSuper()
+ || (receiver instanceof NameReference
+ && (((NameReference) receiver).bits & BindingIds.TYPE) != 0))) {
+ scope.problemReporter().unnecessaryReceiverForStaticField(this, binding);
+ }
+ }
+ return this.resolvedType = binding.type;
}
public void setActualReceiverType(ReferenceBinding receiverType) {
public void setDepth(int depth) {
+ bits &= ~DepthMASK; // flush previous depth if any
if (depth > 0) {
- bits &= ~DepthMASK; // flush previous depth if any
bits |= (depth & 0xFF) << DepthSHIFT; // encoded on 8 bits
}
}
public void setFieldIndex(int index) {
// ignored
}
+ public StringBuffer printExpression(int indent, StringBuffer output) {
+ return receiver.printExpression(0, output).append('.').append(token);
+ }
public String toStringExpression() {
return receiver.toString() + "." //$NON-NLS-1$
+ new String(token);
}
- public void traverse(IAbstractSyntaxTreeVisitor visitor, BlockScope scope) {
+ public void traverse(ASTVisitor visitor, BlockScope scope) {
if (visitor.visit(this, scope)) {
receiver.traverse(visitor, scope);
}
visitor.endVisit(this, scope);
}
-}
\ No newline at end of file
+}
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