--- /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.parser;
+
+/**
+ * Internal block structure for parsing recovery
+ */
+import org.eclipse.jdt.core.compiler.*;
+import org.eclipse.jdt.internal.compiler.ast.Argument;
+import org.eclipse.jdt.internal.compiler.ast.ASTNode;
+import org.eclipse.jdt.internal.compiler.ast.Block;
+import org.eclipse.jdt.internal.compiler.ast.FieldDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.LocalDeclaration;
+import org.eclipse.jdt.internal.compiler.ast.Statement;
+import org.eclipse.jdt.internal.compiler.ast.TypeDeclaration;
+import org.eclipse.jdt.internal.compiler.lookup.BaseTypes;
+import org.eclipse.jdt.internal.compiler.lookup.CompilerModifiers;
+
+public class RecoveredBlock extends RecoveredStatement implements CompilerModifiers, TerminalTokens, BaseTypes {
+
+ public Block blockDeclaration;
+ public RecoveredStatement[] statements;
+ public int statementCount;
+ public boolean preserveContent = false;
+ public RecoveredLocalVariable pendingArgument;
+
+public RecoveredBlock(Block block, RecoveredElement parent, int bracketBalance){
+ super(block, parent, bracketBalance);
+ this.blockDeclaration = block;
+ this.foundOpeningBrace = true;
+}
+/*
+ * Record a nested block declaration
+ */
+public RecoveredElement add(Block nestedBlockDeclaration, int bracketBalanceValue) {
+
+ /* do not consider a nested block starting passed the block end (if set)
+ it must be belonging to an enclosing block */
+ if (this.blockDeclaration.sourceEnd != 0
+ && nestedBlockDeclaration.sourceStart > this.blockDeclaration.sourceEnd){
+ return this.parent.add(nestedBlockDeclaration, bracketBalanceValue);
+ }
+
+ RecoveredBlock element = new RecoveredBlock(nestedBlockDeclaration, this, bracketBalanceValue);
+
+ // if we have a pending Argument, promote it into the new block
+ if (this.pendingArgument != null){
+ element.attach(this.pendingArgument);
+ this.pendingArgument = null;
+ }
+ this.attach(element);
+ if (nestedBlockDeclaration.sourceEnd == 0) return element;
+ return this;
+}
+/*
+ * Record a local declaration
+ */
+public RecoveredElement add(LocalDeclaration localDeclaration, int bracketBalanceValue) {
+ return this.add(localDeclaration, bracketBalanceValue, false);
+}
+/*
+ * Record a local declaration
+ */
+public RecoveredElement add(LocalDeclaration localDeclaration, int bracketBalanceValue, boolean delegatedByParent) {
+
+ /* local variables inside method can only be final and non void */
+/*
+ char[][] localTypeName;
+ if ((localDeclaration.modifiers & ~AccFinal) != 0 // local var can only be final
+ || (localDeclaration.type == null) // initializer
+ || ((localTypeName = localDeclaration.type.getTypeName()).length == 1 // non void
+ && CharOperation.equals(localTypeName[0], VoidBinding.sourceName()))){
+
+ if (delegatedByParent){
+ return this; //ignore
+ } else {
+ this.updateSourceEndIfNecessary(this.previousAvailableLineEnd(localDeclaration.declarationSourceStart - 1));
+ return this.parent.add(localDeclaration, bracketBalance);
+ }
+ }
+*/
+ /* do not consider a local variable starting passed the block end (if set)
+ it must be belonging to an enclosing block */
+ if (this.blockDeclaration.sourceEnd != 0
+ && localDeclaration.declarationSourceStart > this.blockDeclaration.sourceEnd){
+ if (delegatedByParent) return this; //ignore
+ return this.parent.add(localDeclaration, bracketBalanceValue);
+ }
+
+ RecoveredLocalVariable element = new RecoveredLocalVariable(localDeclaration, this, bracketBalanceValue);
+
+ if (localDeclaration instanceof Argument){
+ this.pendingArgument = element;
+ return this;
+ }
+
+ this.attach(element);
+ if (localDeclaration.declarationSourceEnd == 0) return element;
+ return this;
+}
+/*
+ * Record a statement declaration
+ */
+public RecoveredElement add(Statement stmt, int bracketBalanceValue) {
+ return this.add(stmt, bracketBalanceValue, false);
+}
+
+/*
+ * Record a statement declaration
+ */
+public RecoveredElement add(Statement stmt, int bracketBalanceValue, boolean delegatedByParent) {
+
+ /* do not consider a nested block starting passed the block end (if set)
+ it must be belonging to an enclosing block */
+ if (this.blockDeclaration.sourceEnd != 0
+ && stmt.sourceStart > this.blockDeclaration.sourceEnd){
+ if (delegatedByParent) return this; //ignore
+ return this.parent.add(stmt, bracketBalanceValue);
+ }
+
+ RecoveredStatement element = new RecoveredStatement(stmt, this, bracketBalanceValue);
+ this.attach(element);
+ if (stmt.sourceEnd == 0) return element;
+ return this;
+}
+/*
+ * Addition of a type to an initializer (act like inside method body)
+ */
+public RecoveredElement add(TypeDeclaration typeDeclaration, int bracketBalanceValue) {
+ return this.add(typeDeclaration, bracketBalanceValue, false);
+}
+/*
+ * Addition of a type to an initializer (act like inside method body)
+ */
+public RecoveredElement add(TypeDeclaration typeDeclaration, int bracketBalanceValue, boolean delegatedByParent) {
+
+ /* do not consider a type starting passed the block end (if set)
+ it must be belonging to an enclosing block */
+ if (this.blockDeclaration.sourceEnd != 0
+ && typeDeclaration.declarationSourceStart > this.blockDeclaration.sourceEnd){
+ if (delegatedByParent) return this; //ignore
+ return this.parent.add(typeDeclaration, bracketBalanceValue);
+ }
+
+ RecoveredStatement element = new RecoveredType(typeDeclaration, this, bracketBalanceValue);
+ this.attach(element);
+ if (typeDeclaration.declarationSourceEnd == 0) return element;
+ return this;
+}
+/*
+ * Attach a recovered statement
+ */
+void attach(RecoveredStatement recoveredStatement) {
+
+ if (this.statements == null) {
+ this.statements = new RecoveredStatement[5];
+ this.statementCount = 0;
+ } else {
+ if (this.statementCount == this.statements.length) {
+ System.arraycopy(
+ this.statements,
+ 0,
+ (this.statements = new RecoveredStatement[2 * this.statementCount]),
+ 0,
+ this.statementCount);
+ }
+ }
+ this.statements[this.statementCount++] = recoveredStatement;
+}
+/*
+ * Answer the associated parsed structure
+ */
+public ASTNode parseTree(){
+ return this.blockDeclaration;
+}
+public String toString(int tab) {
+ StringBuffer result = new StringBuffer(tabString(tab));
+ result.append("Recovered block:\n"); //$NON-NLS-1$
+ this.blockDeclaration.print(tab + 1, result);
+ if (this.statements != null) {
+ for (int i = 0; i < this.statementCount; i++) {
+ result.append("\n"); //$NON-NLS-1$
+ result.append(this.statements[i].toString(tab + 1));
+ }
+ }
+ return result.toString();
+}
+/*
+ * Rebuild a block from the nested structure which is in scope
+ */
+public Block updatedBlock(){
+
+ // if block was not marked to be preserved or empty, then ignore it
+ if (!this.preserveContent || this.statementCount == 0) return null;
+
+ Statement[] updatedStatements = new Statement[this.statementCount];
+ int updatedCount = 0;
+
+ // only collect the non-null updated statements
+ for (int i = 0; i < this.statementCount; i++){
+ Statement updatedStatement = this.statements[i].updatedStatement();
+ if (updatedStatement != null){
+ updatedStatements[updatedCount++] = updatedStatement;
+ }
+ }
+ if (updatedCount == 0) return null; // not interesting block
+
+ // resize statement collection if necessary
+ if (updatedCount != this.statementCount){
+ this.blockDeclaration.statements = new Statement[updatedCount];
+ System.arraycopy(updatedStatements, 0, this.blockDeclaration.statements, 0, updatedCount);
+ } else {
+ this.blockDeclaration.statements = updatedStatements;
+ }
+
+ return this.blockDeclaration;
+}
+/*
+ * Rebuild a statement from the nested structure which is in scope
+ */
+public Statement updatedStatement(){
+
+ return this.updatedBlock();
+}
+/*
+ * A closing brace got consumed, might have closed the current element,
+ * in which case both the currentElement is exited
+ */
+public RecoveredElement updateOnClosingBrace(int braceStart, int braceEnd){
+ if ((--this.bracketBalance <= 0) && (this.parent != null)){
+ this.updateSourceEndIfNecessary(braceStart, braceEnd);
+
+ /* if the block is the method body, then it closes the method too */
+ RecoveredMethod method = enclosingMethod();
+ if (method != null && method.methodBody == this){
+ return this.parent.updateOnClosingBrace(braceStart, braceEnd);
+ }
+ RecoveredInitializer initializer = enclosingInitializer();
+ if (initializer != null && initializer.initializerBody == this){
+ return this.parent.updateOnClosingBrace(braceStart, braceEnd);
+ }
+ return this.parent;
+ }
+ return this;
+}
+/*
+ * An opening brace got consumed, might be the expected opening one of the current element,
+ * in which case the bodyStart is updated.
+ */
+public RecoveredElement updateOnOpeningBrace(int braceStart, int braceEnd){
+
+ // create a nested block
+ Block block = new Block(0);
+ block.sourceStart = parser().scanner.startPosition;
+ return this.add(block, 1);
+}
+/*
+ * Final update the corresponding parse node
+ */
+public void updateParseTree(){
+
+ this.updatedBlock();
+}
+/*
+ * Rebuild a flattened block from the nested structure which is in scope
+ */
+public Statement updateStatement(){
+
+ // if block was closed or empty, then ignore it
+ if (this.blockDeclaration.sourceEnd != 0 || this.statementCount == 0) return null;
+
+ Statement[] updatedStatements = new Statement[this.statementCount];
+ int updatedCount = 0;
+
+ // only collect the non-null updated statements
+ for (int i = 0; i < this.statementCount; i++){
+ Statement updatedStatement = this.statements[i].updatedStatement();
+ if (updatedStatement != null){
+ updatedStatements[updatedCount++] = updatedStatement;
+ }
+ }
+ if (updatedCount == 0) return null; // not interesting block
+
+ // resize statement collection if necessary
+ if (updatedCount != this.statementCount){
+ this.blockDeclaration.statements = new Statement[updatedCount];
+ System.arraycopy(updatedStatements, 0, this.blockDeclaration.statements, 0, updatedCount);
+ } else {
+ this.blockDeclaration.statements = updatedStatements;
+ }
+
+ return this.blockDeclaration;
+}
+
+/*
+ * Record a field declaration
+ */
+public RecoveredElement add(FieldDeclaration fieldDeclaration, int bracketBalanceValue) {
+
+ /* local variables inside method can only be final and non void */
+ char[][] fieldTypeName;
+ if ((fieldDeclaration.modifiers & ~AccFinal) != 0 // local var can only be final
+ || (fieldDeclaration.type == null) // initializer
+ || ((fieldTypeName = fieldDeclaration.type.getTypeName()).length == 1 // non void
+ && CharOperation.equals(fieldTypeName[0], VoidBinding.sourceName()))){
+ this.updateSourceEndIfNecessary(this.previousAvailableLineEnd(fieldDeclaration.declarationSourceStart - 1));
+ return this.parent.add(fieldDeclaration, bracketBalanceValue);
+ }
+
+ /* do not consider a local variable starting passed the block end (if set)
+ it must be belonging to an enclosing block */
+ if (this.blockDeclaration.sourceEnd != 0
+ && fieldDeclaration.declarationSourceStart > this.blockDeclaration.sourceEnd){
+ return this.parent.add(fieldDeclaration, bracketBalanceValue);
+ }
+
+ // ignore the added field, since indicates a local variable behind recovery point
+ // which thus got parsed as a field reference. This can happen if restarting after
+ // having reduced an assistNode to get the following context (see 1GEK7SG)
+ return this;
+}
+}
projects / org.ibex.tool.git / blobdiff