+++ /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