| /******************************************************************************* |
| * Copyright (c) 2019, 2020 IBM Corporation and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * IBM Corporation - initial API and implementation |
| *******************************************************************************/ |
| |
| package org.eclipse.jdt.core.dom; |
| |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| /** |
| * Yield statement AST node type. |
| * |
| * <pre> |
| * YieldStatement: |
| * <b>Yield</b> <b>{ Identifier/Expression }</b> |
| * </pre> |
| * |
| * @since 3.22 |
| */ |
| @SuppressWarnings("rawtypes") |
| public class YieldStatement extends Statement { |
| |
| /** |
| * The "expression" structural property of this node type (child type: {@link Expression}). (added in JEP 354). |
| */ |
| public static final ChildPropertyDescriptor EXPRESSION_PROPERTY = |
| new ChildPropertyDescriptor(YieldStatement.class, "expression", Expression.class, MANDATORY, NO_CYCLE_RISK); //$NON-NLS-1$); |
| |
| /** |
| * A list of property descriptors (element type: |
| * {@link StructuralPropertyDescriptor}), |
| * or null if uninitialized. |
| */ |
| private static final List PROPERTY_DESCRIPTORS; |
| |
| /** |
| * <code>true</code> indicates implicit and <code>false</code> indicates not implicit. |
| */ |
| private boolean isImplicit = false; |
| |
| static { |
| List properyList = new ArrayList(2); |
| createPropertyList(YieldStatement.class, properyList); |
| addProperty(EXPRESSION_PROPERTY, properyList); |
| PROPERTY_DESCRIPTORS = reapPropertyList(properyList); |
| } |
| |
| /** |
| * Returns a list of structural property descriptors for this node type. |
| * Clients must not modify the result. |
| * |
| * @param apiLevel the API level; one of the |
| * <code>AST.JLS*</code> constants |
| |
| * @return a list of property descriptors (element type: |
| * {@link StructuralPropertyDescriptor}) |
| * @since 3.22 |
| */ |
| public static List propertyDescriptors(int apiLevel) { |
| return PROPERTY_DESCRIPTORS; |
| } |
| |
| /** |
| * The expression |
| */ |
| private Expression expression = null; |
| |
| /** |
| * Creates a new unparented Yield statement node owned by the given |
| * AST. By default, the Yield statement has identifier/expression. |
| * <p> |
| * N.B. This constructor is package-private. |
| * </p> |
| * |
| * @param ast the AST that is to own this node |
| * @exception UnsupportedOperationException if this operation is used below JLS14 |
| */ |
| YieldStatement(AST ast) { |
| super(ast); |
| unsupportedBelow14(); |
| } |
| |
| @Override |
| final List internalStructuralPropertiesForType(int apiLevel) { |
| return propertyDescriptors(apiLevel); |
| } |
| |
| @Override |
| final List internalStructuralPropertiesForType(int apiLevel, boolean previewEnabled) { |
| return propertyDescriptors(apiLevel); |
| } |
| |
| @Override |
| final ASTNode internalGetSetChildProperty(ChildPropertyDescriptor property, boolean get, ASTNode child) { |
| if (property == EXPRESSION_PROPERTY) { |
| if (get) { |
| return getExpression(); |
| } else { |
| setExpression((Expression) child); |
| return null; |
| } |
| } |
| // allow default implementation to flag the error |
| return super.internalGetSetChildProperty(property, get, child); |
| } |
| |
| @Override |
| final int getNodeType0() { |
| return YIELD_STATEMENT; |
| } |
| |
| @Override |
| ASTNode clone0(AST target) { |
| YieldStatement result = new YieldStatement(target); |
| result.setSourceRange(getStartPosition(), getLength()); |
| result.copyLeadingComment(this); |
| if (this.ast.apiLevel >= AST.JLS12_INTERNAL) { |
| result.setExpression((Expression) ASTNode.copySubtree(target, getExpression())); |
| } |
| return result; |
| } |
| |
| @Override |
| final boolean subtreeMatch0(ASTMatcher matcher, Object other) { |
| // dispatch to correct overloaded match method |
| return matcher.match(this, other); |
| } |
| |
| @Override |
| void accept0(ASTVisitor visitor) { |
| boolean visitChildren = visitor.visit(this); |
| if (visitChildren) { |
| if (this.ast.apiLevel >= AST.JLS13_INTERNAL) { |
| acceptChild(visitor, getExpression()); |
| } |
| } |
| visitor.endVisit(this); |
| } |
| |
| /** |
| * Returns the expression of this Yield statement, or <code>null</code> if |
| * there is none. |
| * |
| * @return the expression, or <code>null</code> if there is none |
| * @exception UnsupportedOperationException if this operation is used below JLS14 |
| * @since 3.22 |
| */ |
| public Expression getExpression() { |
| unsupportedBelow14(); |
| return this.expression; |
| } |
| |
| /** |
| * Sets or clears the expression of this Yield statement. |
| * |
| * @param expression the expression |
| * @exception IllegalArgumentException if: |
| * <ul> |
| * <li>the node belongs to a different AST</li> |
| * <li>the node already has a parent</li> |
| * </ul> |
| * @exception UnsupportedOperationException if this operation is used below JLS14 |
| * @since 3.22 |
| */ |
| public void setExpression(Expression expression) { |
| unsupportedBelow14(); |
| ASTNode oldChild = this.expression; |
| preReplaceChild(oldChild, expression, EXPRESSION_PROPERTY); |
| this.expression = expression; |
| postReplaceChild(oldChild, expression, EXPRESSION_PROPERTY); |
| } |
| |
| /** |
| * Gets the isImplicit of this break statement as <code>true</code> or <code>false</code>. |
| *<code>true</code> indicates implicit and <code>false</code> indicates not implicit. |
| * |
| * @return isImplicit <code>true</code> or <code>false</code> |
| * @exception UnsupportedOperationException if this operation is used below JLS14 |
| * @since 3.22 |
| */ |
| public boolean isImplicit() { |
| unsupportedBelow14(); |
| return this.isImplicit; |
| } |
| |
| /** |
| * Sets the isImplicit of this break statement as <code>true</code> or <code>false</code>. |
| * <code>true</code> indicates implicit and <code>false</code> indicates not implicit. This flag is |
| * generated by compiler and is not expected to be set by client. |
| |
| * @param isImplicit <code>true</code> or <code>false</code> |
| * @exception UnsupportedOperationException if this operation is used below JLS14 |
| */ |
| void setImplicit(boolean isImplicit) { |
| unsupportedBelow14(); |
| this.isImplicit = isImplicit; |
| } |
| |
| |
| @Override |
| int memSize() { |
| return super.memSize() + 2 * 4; |
| } |
| |
| @Override |
| int treeSize() { |
| return |
| memSize() |
| + (this.expression == null ? 0 : getExpression().treeSize()); |
| } |
| } |
| |