--- /dev/null
+/*******************************************************************************
+ * Copyright (c) 2000, 2004 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 org.eclipse.jdt.internal.compiler.ast;
+
+import org.eclipse.jdt.internal.compiler.ASTVisitor;
+import org.eclipse.jdt.internal.compiler.codegen.*;
+import org.eclipse.jdt.internal.compiler.flow.*;
+import org.eclipse.jdt.internal.compiler.lookup.*;
+
+public class ArrayInitializer extends Expression {
+
+ public Expression[] expressions;
+ public ArrayBinding binding; //the type of the { , , , }
+
+ /**
+ * ArrayInitializer constructor comment.
+ */
+ public ArrayInitializer() {
+
+ super();
+ }
+
+ public FlowInfo analyseCode(BlockScope currentScope, FlowContext flowContext, FlowInfo flowInfo) {
+
+ if (expressions != null) {
+ for (int i = 0, max = expressions.length; i < max; i++) {
+ flowInfo = expressions[i].analyseCode(currentScope, flowContext, flowInfo).unconditionalInits();
+ }
+ }
+ return flowInfo;
+ }
+
+ /**
+ * Code generation for a array initializer
+ */
+ public void generateCode(BlockScope currentScope, CodeStream codeStream, boolean valueRequired) {
+
+ // Flatten the values and compute the dimensions, by iterating in depth into nested array initializers
+ int pc = codeStream.position;
+ int expressionLength = (expressions == null) ? 0: expressions.length;
+ codeStream.generateInlinedValue(expressionLength);
+ codeStream.newArray(currentScope, binding);
+ if (expressions != null) {
+ // binding is an ArrayType, so I can just deal with the dimension
+ int elementsTypeID = binding.dimensions > 1 ? -1 : binding.leafComponentType.id;
+ for (int i = 0; i < expressionLength; i++) {
+ Expression expr;
+ if ((expr = expressions[i]).constant != NotAConstant) {
+ switch (elementsTypeID) { // filter out initializations to default values
+ case T_int :
+ case T_short :
+ case T_byte :
+ case T_char :
+ case T_long :
+ if (expr.constant.longValue() != 0) {
+ codeStream.dup();
+ codeStream.generateInlinedValue(i);
+ expr.generateCode(currentScope, codeStream, true);
+ codeStream.arrayAtPut(elementsTypeID, false);
+ }
+ break;
+ case T_float :
+ case T_double :
+ double constantValue = expr.constant.doubleValue();
+ if (constantValue == -0.0 || constantValue != 0) {
+ codeStream.dup();
+ codeStream.generateInlinedValue(i);
+ expr.generateCode(currentScope, codeStream, true);
+ codeStream.arrayAtPut(elementsTypeID, false);
+ }
+ break;
+ case T_boolean :
+ if (expr.constant.booleanValue() != false) {
+ codeStream.dup();
+ codeStream.generateInlinedValue(i);
+ expr.generateCode(currentScope, codeStream, true);
+ codeStream.arrayAtPut(elementsTypeID, false);
+ }
+ break;
+ default :
+ if (!(expr instanceof NullLiteral)) {
+ codeStream.dup();
+ codeStream.generateInlinedValue(i);
+ expr.generateCode(currentScope, codeStream, true);
+ codeStream.arrayAtPut(elementsTypeID, false);
+ }
+ }
+ } else if (!(expr instanceof NullLiteral)) {
+ codeStream.dup();
+ codeStream.generateInlinedValue(i);
+ expr.generateCode(currentScope, codeStream, true);
+ codeStream.arrayAtPut(elementsTypeID, false);
+ }
+ }
+ }
+ if (!valueRequired) {
+ codeStream.pop();
+ }
+ codeStream.recordPositionsFrom(pc, this.sourceStart);
+ }
+
+ public StringBuffer printExpression(int indent, StringBuffer output) {
+
+ output.append('{');
+ if (expressions != null) {
+ int j = 20 ;
+ for (int i = 0 ; i < expressions.length ; i++) {
+ if (i > 0) output.append(", "); //$NON-NLS-1$
+ expressions[i].printExpression(0, output);
+ j -- ;
+ if (j == 0) {
+ output.append('\n');
+ printIndent(indent+1, output);
+ j = 20;
+ }
+ }
+ }
+ return output.append('}');
+ }
+
+ public TypeBinding resolveTypeExpecting(BlockScope scope, TypeBinding expectedTb) {
+ // Array initializers can only occur on the right hand side of an assignment
+ // expression, therefore the expected type contains the valid information
+ // concerning the type that must be enforced by the elements of the array initializer.
+
+ // this method is recursive... (the test on isArrayType is the stop case)
+
+ constant = NotAConstant;
+ if (expectedTb.isArrayType()) {
+ binding = (ArrayBinding) expectedTb;
+ if (expressions == null)
+ return binding;
+ TypeBinding expectedElementsTb = binding.elementsType(scope);
+ if (expectedElementsTb.isBaseType()) {
+ for (int i = 0, length = expressions.length; i < length; i++) {
+ Expression expression = expressions[i];
+ TypeBinding expressionTb =
+ (expression instanceof ArrayInitializer)
+ ? expression.resolveTypeExpecting(scope, expectedElementsTb)
+ : expression.resolveType(scope);
+ if (expressionTb == null)
+ return null;
+
+ // Compile-time conversion required?
+ if (expression.isConstantValueOfTypeAssignableToType(expressionTb, expectedElementsTb)) {
+ expression.implicitWidening(expectedElementsTb, expressionTb);
+ } else if (BaseTypeBinding.isWidening(expectedElementsTb.id, expressionTb.id)) {
+ expression.implicitWidening(expectedElementsTb, expressionTb);
+ } else {
+ scope.problemReporter().typeMismatchErrorActualTypeExpectedType(expression, expressionTb, expectedElementsTb);
+ return null;
+ }
+ }
+ } else {
+ for (int i = 0, length = expressions.length; i < length; i++)
+ if (expressions[i].resolveTypeExpecting(scope, expectedElementsTb) == null)
+ return null;
+ }
+ return binding;
+ }
+
+ // infer initializer type for error reporting based on first element
+ TypeBinding leafElementType = null;
+ int dim = 1;
+ if (expressions == null) {
+ leafElementType = scope.getJavaLangObject();
+ } else {
+ Expression currentExpression = expressions[0];
+ while(currentExpression != null && currentExpression instanceof ArrayInitializer) {
+ dim++;
+ Expression[] subExprs = ((ArrayInitializer) currentExpression).expressions;
+ if (subExprs == null){
+ leafElementType = scope.getJavaLangObject();
+ currentExpression = null;
+ break;
+ }
+ currentExpression = ((ArrayInitializer) currentExpression).expressions[0];
+ }
+ if (currentExpression != null) {
+ leafElementType = currentExpression.resolveType(scope);
+ }
+ }
+ if (leafElementType != null) {
+ TypeBinding probableTb = scope.createArray(leafElementType, dim);
+ scope.problemReporter().typeMismatchErrorActualTypeExpectedType(this, probableTb, expectedTb);
+ }
+ return null;
+ }
+
+ public void traverse(ASTVisitor visitor, BlockScope scope) {
+
+ if (visitor.visit(this, scope)) {
+ if (expressions != null) {
+ int expressionsLength = expressions.length;
+ for (int i = 0; i < expressionsLength; i++)
+ expressions[i].traverse(visitor, scope);
+ }
+ }
+ visitor.endVisit(this, scope);
+ }
+}
projects / org.ibex.tool.git / blobdiff