RelationalExpression.java

/*
 * Copyright 2000-2007 JetBrains s.r.o.
 * 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 org.fandev.lang.fan.parsing.expression.logical;

import com.intellij.lang.PsiBuilder;
import com.intellij.psi.tree.TokenSet;
import com.intellij.psi.tree.IElementType;
import static org.fandev.lang.fan.FanElementTypes.RELATIONAL_EXPR;
import static org.fandev.lang.fan.FanTokenTypes.RELATIONAL_OP;
import org.fandev.lang.fan.FanTokenTypes;
import org.fandev.lang.fan.parsing.types.TypeSpec;

/**
 * @author ilyas
 */
public class RelationalExpression extends SeparatorRepeatExpression {
    private static final RelationalExpression instance = new RelationalExpression();

    public RelationalExpression() {
        super(RELATIONAL_EXPR, RELATIONAL_OP);
    }

    public boolean innerParse(final PsiBuilder builder, final TokenSet stopper) {
        return ElvisExpression.parse(builder, stopper);
    }

    public static boolean parse(final PsiBuilder builder, final TokenSet stopper) {
        return instance.parseThis(builder, stopper);
    }

    @Override
    protected boolean rheParse(final PsiBuilder builder, final TokenSet newStopper, final IElementType separator) {
        // For as, is and isnot separators only type expected
        if (FanTokenTypes.TYPE_COMPARE.contains(separator)) {
            return TypeSpec.parse(builder);
        }
        return super.rheParse(builder, newStopper, separator);
    }
}