package org.jtwig.parser.parboiled.expression;
import org.jtwig.model.expression.ConstantExpression;
import org.jtwig.parser.parboiled.ParserContext;
import org.jtwig.parser.parboiled.base.LexicParser;
import org.jtwig.parser.parboiled.base.PositionTrackerParser;
import org.jtwig.parser.parboiled.model.Keyword;
import org.parboiled.Rule;
public class NullExpressionParser extends ExpressionParser<ConstantExpression> {
public NullExpressionParser(ParserContext context) {
super(NullExpressionParser.class, context);
}
@Override
public Rule ExpressionRule() {
PositionTrackerParser positionTrackerParser = parserContext().parser(PositionTrackerParser.class);
return Sequence(
positionTrackerParser.PushPosition(),
parserContext().parser(LexicParser.class).Keyword(Keyword.NULL),
push(new ConstantExpression(positionTrackerParser.pop(), null))
);
}
}