Java TypeIds.IMPLICIT_CONVERSION_MASK属性代码示例

public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, Expression expression, int operator, int assignmentImplicitConversion, boolean valueRequired) {
	this.receiver.generateCode(currentScope, codeStream, true);
	if (this.receiver instanceof CastExpression	// ((type[])null)[0]
			&& ((CastExpression)this.receiver).innermostCastedExpression().resolvedType == TypeBinding.NULL){
		codeStream.checkcast(this.receiver.resolvedType);
	}
	this.position.generateCode(currentScope, codeStream, true);
	codeStream.dup2();
	codeStream.arrayAt(this.resolvedType.id);
	int operationTypeID;
	switch(operationTypeID = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4) {
		case T_JavaLangString :
		case T_JavaLangObject :
		case T_undefined :
			codeStream.generateStringConcatenationAppend(currentScope, null, expression);
			break;
		default :
			// promote the array reference to the suitable operation type
			codeStream.generateImplicitConversion(this.implicitConversion);
			// generate the increment value (will by itself  be promoted to the operation value)
			if (expression == IntLiteral.One) { // prefix operation
				codeStream.generateConstant(expression.constant, this.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);
	}
	codeStream.arrayAtPut(this.resolvedType.id, valueRequired);
}
 

/**
 * @see org.eclipse.jdt.internal.compiler.ast.Expression#postConversionType(Scope)
 */
public TypeBinding postConversionType(Scope scope) {
	TypeBinding convertedType = this.resolvedType;
	if (this.genericCast != null)
		convertedType = this.genericCast;
	int runtimeType = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4;
	switch (runtimeType) {
		case T_boolean :
			convertedType = TypeBinding.BOOLEAN;
			break;
		case T_byte :
			convertedType = TypeBinding.BYTE;
			break;
		case T_short :
			convertedType = TypeBinding.SHORT;
			break;
		case T_char :
			convertedType = TypeBinding.CHAR;
			break;
		case T_int :
			convertedType = TypeBinding.INT;
			break;
		case T_float :
			convertedType = TypeBinding.FLOAT;
			break;
		case T_long :
			convertedType = TypeBinding.LONG;
			break;
		case T_double :
			convertedType = TypeBinding.DOUBLE;
			break;
		default :
	}
	if ((this.implicitConversion & TypeIds.BOXING) != 0) {
		convertedType = scope.environment().computeBoxingType(convertedType);
	}
	return convertedType;
}
 

/**
 * Returns the type of the expression after required implicit conversions. When expression type gets promoted
 * or inserted a generic cast, the converted type will differ from the resolved type (surface side-effects from
 * #computeConversion(...)).
 * @return the type after implicit conversion
 */
public TypeBinding postConversionType(Scope scope) {
	TypeBinding convertedType = this.resolvedType;
	int runtimeType = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4;
	switch (runtimeType) {
		case T_boolean :
			convertedType = TypeBinding.BOOLEAN;
			break;
		case T_byte :
			convertedType = TypeBinding.BYTE;
			break;
		case T_short :
			convertedType = TypeBinding.SHORT;
			break;
		case T_char :
			convertedType = TypeBinding.CHAR;
			break;
		case T_int :
			convertedType = TypeBinding.INT;
			break;
		case T_float :
			convertedType = TypeBinding.FLOAT;
			break;
		case T_long :
			convertedType = TypeBinding.LONG;
			break;
		case T_double :
			convertedType = TypeBinding.DOUBLE;
			break;
		default :
	}
	if ((this.implicitConversion & TypeIds.BOXING) != 0) {
		convertedType = scope.environment().computeBoxingType(convertedType);
	}
	return convertedType;
}
 

/**
 * @see org.eclipse.jdt.internal.compiler.ast.Expression#postConversionType(Scope)
 */
public TypeBinding postConversionType(Scope scope) {
	TypeBinding convertedType = this.resolvedType;
	TypeBinding requiredGenericCast = getGenericCast(this.otherBindings == null ? 0 : this.otherBindings.length);
	if (requiredGenericCast != null)
		convertedType = requiredGenericCast;
	int runtimeType = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4;
	switch (runtimeType) {
		case T_boolean :
			convertedType = TypeBinding.BOOLEAN;
			break;
		case T_byte :
			convertedType = TypeBinding.BYTE;
			break;
		case T_short :
			convertedType = TypeBinding.SHORT;
			break;
		case T_char :
			convertedType = TypeBinding.CHAR;
			break;
		case T_int :
			convertedType = TypeBinding.INT;
			break;
		case T_float :
			convertedType = TypeBinding.FLOAT;
			break;
		case T_long :
			convertedType = TypeBinding.LONG;
			break;
		case T_double :
			convertedType = TypeBinding.DOUBLE;
			break;
		default :
	}
	if ((this.implicitConversion & TypeIds.BOXING) != 0) {
		convertedType = scope.environment().computeBoxingType(convertedType);
	}
	return convertedType;
}
 

/**
 * @see org.eclipse.jdt.internal.compiler.ast.Expression#postConversionType(Scope)
 */
public TypeBinding postConversionType(Scope scope) {
	TypeBinding convertedType = this.resolvedType;
	if (this.valueCast != null)
		convertedType = this.valueCast;
	int runtimeType = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4;
	switch (runtimeType) {
		case T_boolean :
			convertedType = TypeBinding.BOOLEAN;
			break;
		case T_byte :
			convertedType = TypeBinding.BYTE;
			break;
		case T_short :
			convertedType = TypeBinding.SHORT;
			break;
		case T_char :
			convertedType = TypeBinding.CHAR;
			break;
		case T_int :
			convertedType = TypeBinding.INT;
			break;
		case T_float :
			convertedType = TypeBinding.FLOAT;
			break;
		case T_long :
			convertedType = TypeBinding.LONG;
			break;
		case T_double :
			convertedType = TypeBinding.DOUBLE;
			break;
		default :
	}
	if ((this.implicitConversion & TypeIds.BOXING) != 0) {
		convertedType = scope.environment().computeBoxingType(convertedType);
	}
	return convertedType;
}
 

public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, Expression expression, int operator, int assignmentImplicitConversion, boolean valueRequired) {
	FieldBinding lastFieldBinding = generateReadSequence(currentScope, codeStream);
	// check if compound assignment is the only usage of a private field
	reportOnlyUselesslyReadPrivateField(currentScope, lastFieldBinding, valueRequired);
	boolean isFirst = lastFieldBinding == this.binding
		&& (this.indexOfFirstFieldBinding == 1 || TypeBinding.equalsEquals(lastFieldBinding.declaringClass, currentScope.enclosingReceiverType()))
		&& this.otherBindings == null; // could be dup: next.next.next
	TypeBinding constantPoolDeclaringClass = CodeStream.getConstantPoolDeclaringClass(currentScope, lastFieldBinding, getFinalReceiverType(), isFirst);			
	SyntheticMethodBinding accessor = this.syntheticReadAccessors == null ? null : this.syntheticReadAccessors[this.syntheticReadAccessors.length - 1];
	if (lastFieldBinding.isStatic()) {
		if (accessor == null) {
			codeStream.fieldAccess(Opcodes.OPC_getstatic, lastFieldBinding, constantPoolDeclaringClass);
		} else {
			codeStream.invoke(Opcodes.OPC_invokestatic, accessor, null /* default declaringClass */);
		}
	} else {
		codeStream.dup();
		if (accessor == null) {
			codeStream.fieldAccess(Opcodes.OPC_getfield, lastFieldBinding, constantPoolDeclaringClass);
		} else {
			codeStream.invoke(Opcodes.OPC_invokestatic, accessor, null /* default declaringClass */);
		}
	}
	// the last field access is a write access
	// perform the actual compound operation
	int operationTypeID;
	switch(operationTypeID = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4) {
		case T_JavaLangString :
		case T_JavaLangObject :
		case T_undefined :
			codeStream.generateStringConcatenationAppend(currentScope, null, expression);
			break;
		default :
			TypeBinding requiredGenericCast = getGenericCast(this.otherBindings == null ? 0 : this.otherBindings.length);
			if (requiredGenericCast != null) codeStream.checkcast(requiredGenericCast);
			// promote the array reference to the suitable operation type
			codeStream.generateImplicitConversion(this.implicitConversion);
			// generate the increment value (will by itself  be promoted to the operation value)
			if (expression == IntLiteral.One) { // prefix operation
				codeStream.generateConstant(expression.constant, this.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);
	}
	// actual assignment
	fieldStore(currentScope, codeStream, lastFieldBinding, this.syntheticWriteAccessor, getFinalReceiverType(), false /*implicit this*/, valueRequired);
	// equivalent to valuesRequired[maxOtherBindings]
}
 

public void generateCompoundAssignment(BlockScope currentScope, CodeStream codeStream, Expression expression, int operator, int assignmentImplicitConversion, boolean valueRequired) {
	FieldBinding lastFieldBinding = generateReadSequence(currentScope, codeStream);
	// check if compound assignment is the only usage of a private field
	reportOnlyUselesslyReadPrivateField(currentScope, lastFieldBinding, valueRequired);
	boolean isFirst = lastFieldBinding == this.binding
		&& (this.indexOfFirstFieldBinding == 1 || lastFieldBinding.declaringClass == currentScope.enclosingReceiverType())
		&& this.otherBindings == null; // could be dup: next.next.next
	TypeBinding constantPoolDeclaringClass = CodeStream.getConstantPoolDeclaringClass(currentScope, lastFieldBinding, getFinalReceiverType(), isFirst);			
	SyntheticMethodBinding accessor = this.syntheticReadAccessors == null ? null : this.syntheticReadAccessors[this.syntheticReadAccessors.length - 1];
	if (lastFieldBinding.isStatic()) {
		if (accessor == null) {
			codeStream.fieldAccess(Opcodes.OPC_getstatic, lastFieldBinding, constantPoolDeclaringClass);
		} else {
			codeStream.invoke(Opcodes.OPC_invokestatic, accessor, null /* default declaringClass */);
		}
	} else {
		codeStream.dup();
		if (accessor == null) {
			codeStream.fieldAccess(Opcodes.OPC_getfield, lastFieldBinding, constantPoolDeclaringClass);
		} else {
			codeStream.invoke(Opcodes.OPC_invokestatic, accessor, null /* default declaringClass */);
		}
	}
	// the last field access is a write access
	// perform the actual compound operation
	int operationTypeID;
	switch(operationTypeID = (this.implicitConversion & TypeIds.IMPLICIT_CONVERSION_MASK) >> 4) {
		case T_JavaLangString :
		case T_JavaLangObject :
		case T_undefined :
			codeStream.generateStringConcatenationAppend(currentScope, null, expression);
			break;
		default :
			TypeBinding requiredGenericCast = getGenericCast(this.otherBindings == null ? 0 : this.otherBindings.length);
			if (requiredGenericCast != null) codeStream.checkcast(requiredGenericCast);
			// promote the array reference to the suitable operation type
			codeStream.generateImplicitConversion(this.implicitConversion);
			// generate the increment value (will by itself  be promoted to the operation value)
			if (expression == IntLiteral.One) { // prefix operation
				codeStream.generateConstant(expression.constant, this.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);
	}
	// actual assignment
	fieldStore(currentScope, codeStream, lastFieldBinding, this.syntheticWriteAccessor, getFinalReceiverType(), false /*implicit this*/, valueRequired);
	// equivalent to valuesRequired[maxOtherBindings]
}