manifold.preprocessor.expression.Expression Maven / Gradle / Ivy
/*
* Copyright (c) 2019 - Manifold Systems LLC
*
* Licensed 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 manifold.preprocessor.expression;
import java.util.ArrayList;
import java.util.List;
import java.util.function.Predicate;
import manifold.preprocessor.definitions.Definitions;
public abstract class Expression
{
private final List _errors = new ArrayList<>();
private final int _startOffset;
private final int _endOffset;
public Expression( int startOffset, int endOffset )
{
_startOffset = startOffset;
_endOffset = endOffset;
}
public abstract List getChildren();
public abstract boolean evaluate( Definitions definitions );
public String getValue( Definitions definitions )
{
return String.valueOf( evaluate( definitions ) );
}
public int getStartOffset()
{
return _startOffset;
}
public int getEndOffset()
{
return _endOffset;
}
void error( String message, int tokenStart )
{
_errors.add( new ParseError( message, tokenStart ) );
}
public boolean visitErrors( Predicate visitor )
{
for( ParseError e: _errors )
{
if( !visitor.test( e ) )
{
return false;
}
}
for( Expression child: getChildren() )
{
if( !child.visitErrors( visitor ) )
{
return false;
}
}
return true;
}
public boolean hasErrors()
{
return !visitErrors( e -> false );
}
}