/*
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
*/
package org.apache.flex.compiler.internal.definitions;
import org.apache.flex.compiler.common.DependencyType;
import org.apache.flex.compiler.constants.IASLanguageConstants.BuiltinType;
import org.apache.flex.compiler.definitions.IParameterDefinition;
import org.apache.flex.compiler.definitions.references.IReference;
import org.apache.flex.compiler.definitions.references.ReferenceFactory;
import org.apache.flex.compiler.internal.scopes.CatchScope;
import org.apache.flex.compiler.projects.ICompilerProject;
import org.apache.flex.compiler.scopes.IASScope;
import org.apache.flex.compiler.tree.as.IParameterNode;
/**
* Each instance of this class represents the definition of an ActionScript
* function parameter in the symbol table.
* <p>
* After a parameter definition is in the symbol table, it should always be
* accessed through the read-only <code>IParameterDefinition</code> interface.
*/
public class ParameterDefinition extends VariableDefinition implements IParameterDefinition
{
public ParameterDefinition(String name)
{
super(name);
}
@Override
public boolean isRest()
{
return (flags & FLAG_REST) != 0;
}
public void setRest()
{
flags |= FLAG_REST;
// The type of a '...' parameter is always Array.
IReference arrayTypeReference = ReferenceFactory.builtinReference(BuiltinType.ARRAY);
setTypeReference(arrayTypeReference);
}
@Override
public boolean hasDefaultValue()
{
return (flags & FLAG_DEFAULT) != 0;
}
public void setHasDefault()
{
flags |= FLAG_DEFAULT;
}
public void setDefaultValue(Object value)
{
initValue = value;
flags |= FLAG_DEFAULT;
}
@Override
public Object resolveDefaultValue(ICompilerProject project)
{
// We can use VariableDefinitions initial value code, as it does
// the same thing.
if (hasDefaultValue())
return resolveInitialValue(project);
return null;
}
@Override
protected DependencyType getTypeDependencyType()
{
// TODO If this a parameter to a function closure
// then this method should return DependencyType.EXPRESSION.
return DependencyType.SIGNATURE;
}
@Override
public IParameterNode getNode()
{
return (IParameterNode)super.getNode();
}
@Override
public boolean matches(DefinitionBase node)
{
boolean matches = super.matches(node);
if (!matches)
return false;
if (node.getNameStart() != getNameStart() || node.getNameEnd() != getNameEnd())
return false;
return true;
}
/**
* For debugging only.
*/
@Override
public void buildInnerString(StringBuilder sb)
{
sb.append(getBaseName());
String type = getTypeAsDisplayString();
if (!type.isEmpty())
{
sb.append(':');
sb.append(type);
}
}
@Override
public final VariableClassification getVariableClassification()
{
IASScope containingScope = getContainingScope();
if (containingScope instanceof CatchScope)
return VariableClassification.LOCAL;
return VariableClassification.PARAMETER;
}
}