+++ /dev/null
-/*******************************************************************************
- * 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 v1.0
- * which accompanies this distribution, and is available at
- * http://www.eclipse.org/legal/cpl-v10.html
- *
- * Contributors:
- * IBM Corporation - initial API and implementation
- *******************************************************************************/
-package net.sourceforge.phpeclipse.internal.compiler.ast;
-
-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.lookup.ArrayBinding;
-import net.sourceforge.phpdt.internal.compiler.lookup.BlockScope;
-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.TypeBinding;
-
-
-public class InstanceOfExpression extends OperatorExpression {
-
- public Expression expression;
- public TypeReference type;
-
- public InstanceOfExpression(
- Expression expression,
- TypeReference type,
- int operator) {
-
- this.expression = expression;
- this.type = type;
- this.bits |= operator << OperatorSHIFT;
- this.sourceStart = expression.sourceStart;
- this.sourceEnd = type.sourceEnd;
- }
-
- public FlowInfo analyseCode(
- BlockScope currentScope,
- FlowContext flowContext,
- FlowInfo flowInfo) {
-
- return expression
- .analyseCode(currentScope, flowContext, flowInfo)
- .unconditionalInits();
- }
-
- public final boolean areTypesCastCompatible(
- BlockScope scope,
- TypeBinding castType,
- TypeBinding expressionType) {
-
- // see specifications p.68
- //A more cpmplete version of this method is provided on
- //CastExpression (it deals with constant and need runtime checkcast)
-
- if (castType == expressionType) return true;
-
- //by grammatical construction, the first test is ALWAYS false
- //if (castTb.isBaseType())
- //{ if (expressionTb.isBaseType())
- // { if (expression.isConstantValueOfTypeAssignableToType(expressionTb,castTb))
- // { return true;}
- // else
- // { if (expressionTb==castTb)
- // { return true;}
- // else
- // { if (scope.areTypesCompatible(expressionTb,castTb))
- // { return true; }
- //
- // if (BaseTypeBinding.isNarrowing(castTb.id,expressionTb.id))
- // { return true;}
- // return false;}}}
- // else
- // { return false; }}
- //else
- { //-------------checkcast to something which is NOT a basetype----------------------------------
-
- //null is compatible with every thing ....
- if (NullBinding == expressionType) {
- return true;
- }
- if (expressionType.isArrayType()) {
- if (castType.isArrayType()) {
- //------- (castTb.isArray) expressionTb.isArray -----------
- TypeBinding expressionEltTb = ((ArrayBinding) expressionType).elementsType(scope);
- if (expressionEltTb.isBaseType())
- // <---stop the recursion-------
- return ((ArrayBinding) castType).elementsType(scope) == expressionEltTb;
- //recursivly on the elts...
- return areTypesCastCompatible(
- scope,
- ((ArrayBinding) castType).elementsType(scope),
- expressionEltTb);
- }
- if (castType.isClass()) {
- //------(castTb.isClass) expressionTb.isArray ---------------
- if (scope.isJavaLangObject(castType))
- return true;
- return false;
- }
- if (castType.isInterface()) {
- //------- (castTb.isInterface) expressionTb.isArray -----------
- if (scope.isJavaLangCloneable(castType) || scope.isJavaIoSerializable(castType)) {
- return true;
- }
- return false;
- }
-
- return false;
- }
- if (expressionType.isBaseType()) {
- return false;
- }
- if (expressionType.isClass()) {
- if (castType.isArrayType()) {
- // ---- (castTb.isArray) expressionTb.isClass -------
- if (scope.isJavaLangObject(expressionType)) {
- return true;
- } else {
- return false;
- }
- }
- if (castType.isClass()) { // ----- (castTb.isClass) expressionTb.isClass ------
- if (expressionType.isCompatibleWith(castType))
- return true;
- else {
- if (castType.isCompatibleWith(expressionType)) {
- return true;
- }
- return false;
- }
- }
- if (castType.isInterface()) {
- // ----- (castTb.isInterface) expressionTb.isClass -------
- if (((ReferenceBinding) expressionType).isFinal()) {
- //no subclass for expressionTb, thus compile-time check is valid
- if (expressionType.isCompatibleWith(castType))
- return true;
- return false;
- } else {
- return true;
- }
- }
-
- return false;
- }
- if (expressionType.isInterface()) {
- if (castType.isArrayType()) {
- // ----- (castTb.isArray) expressionTb.isInterface ------
- if (scope.isJavaLangCloneable(expressionType)
- || scope.isJavaIoSerializable(expressionType))
- //potential runtime error
- {
- return true;
- }
- return false;
- }
- if (castType.isClass()) {
- // ----- (castTb.isClass) expressionTb.isInterface --------
- if (scope.isJavaLangObject(castType))
- return true;
- if (((ReferenceBinding) castType).isFinal()) {
- //no subclass for castTb, thus compile-time check is valid
- if (castType.isCompatibleWith(expressionType)) {
- return true;
- }
- return false;
- }
- return true;
- }
- if (castType.isInterface()) {
- // ----- (castTb.isInterface) expressionTb.isInterface -------
- if ((Scope.compareTypes(castType, expressionType) == NotRelated)) {
- MethodBinding[] castTbMethods = ((ReferenceBinding) castType).methods();
- int castTbMethodsLength = castTbMethods.length;
- MethodBinding[] expressionTbMethods =
- ((ReferenceBinding) expressionType).methods();
- int expressionTbMethodsLength = expressionTbMethods.length;
- for (int i = 0; i < castTbMethodsLength; i++) {
- for (int j = 0; j < expressionTbMethodsLength; j++) {
- if (castTbMethods[i].selector == expressionTbMethods[j].selector) {
- if (castTbMethods[i].returnType != expressionTbMethods[j].returnType) {
- if (castTbMethods[i].areParametersEqual(expressionTbMethods[j])) {
- return false;
- }
- }
- }
- }
- }
- }
- return true;
- }
-
- return false;
- }
-
- return false;
- }
- }
- /**
- * Code generation for instanceOfExpression
- *
- * @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;
-// expression.generateCode(currentScope, codeStream, true);
-// codeStream.instance_of(type.resolvedType);
-// if (!valueRequired)
-// codeStream.pop();
-// codeStream.recordPositionsFrom(pc, this.sourceStart);
-// }
-
- public TypeBinding resolveType(BlockScope scope) {
-
- constant = NotAConstant;
- TypeBinding expressionType = expression.resolveType(scope);
- TypeBinding checkType = type.resolveType(scope);
- if (expressionType == null || checkType == null)
- return null;
-
- if (!areTypesCastCompatible(scope, checkType, expressionType)) {
- scope.problemReporter().notCompatibleTypesError(this, expressionType, checkType);
- return null;
- }
- this.resolvedType = BooleanBinding;
- return BooleanBinding;
- }
- public StringBuffer printExpressionNoParenthesis(int indent, StringBuffer output) {
-
- expression.printExpression(indent, output).append(" instanceof "); //$NON-NLS-1$
- return type.print(0, output);
- }
- public String toStringExpressionNoParenthesis() {
-
- return expression.toStringExpression() + " instanceof " + //$NON-NLS-1$
- type.toString(0);
- }
-
- public void traverse(ASTVisitor visitor, BlockScope scope) {
-
- if (visitor.visit(this, scope)) {
- expression.traverse(visitor, scope);
- type.traverse(visitor, scope);
- }
- visitor.endVisit(this, scope);
- }
-}
git://git.phpeclipse.com / phpeclipse.git / blobdiff