--- /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.phpdt.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