/******************************************************************************* * 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. * *
* YieldStatement: * Yield { Identifier/Expression } ** * @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; /** *
true
indicates implicit and false
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
* AST.JLS*
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.
* * N.B. This constructor is package-private. *
* * @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, ornull
if
* there is none.
*
* @return the expression, or null
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:
* true
or false
.
*true
indicates implicit and false
indicates not implicit.
*
* @return isImplicit true
or false
* @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 true
or false
.
* true
indicates implicit and false
indicates not implicit. This flag is
* generated by compiler and is not expected to be set by client.
* @param isImplicit true
or false
* @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());
}
}