content: /*
   * Copyright (C) 2020 ActiveJ 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 io.activej.codegen.expression.impl;
  
  import io.activej.codegen.Context;
  import io.activej.codegen.expression.Expression;
  import io.activej.common.annotation.ExposedInternals;
  import org.objectweb.asm.Label;
  import org.objectweb.asm.Type;
  import org.objectweb.asm.commons.GeneratorAdapter;
  
  import java.util.List;
  
  import static io.activej.codegen.util.TypeChecks.checkType;
  import static io.activej.codegen.util.TypeChecks.is;
  import static org.objectweb.asm.Type.BOOLEAN_TYPE;
  
  /**
   * Defines methods for using logical 'and' for boolean type
   */
  @ExposedInternals
  public final class BooleanAnd implements Expression {
  	public final List<Expression> expressions;
  
  	public BooleanAnd(List<Expression> expressions) {
  		this.expressions = expressions;
  	}
  
  	@Override
  	public Type load(Context ctx) {
  		GeneratorAdapter g = ctx.getGeneratorAdapter();
  		Label exit = new Label();
  		Label labelFalse = new Label();
  		for (Expression predicate : expressions) {
  			Type type = predicate.load(ctx);
  			checkType(type, is(BOOLEAN_TYPE));
  			g.ifZCmp(GeneratorAdapter.EQ, labelFalse);
  		}
  		g.push(true);
  		g.goTo(exit);
  
  		g.mark(labelFalse);
  		g.push(false);
  
  		g.mark(exit);
  		return BOOLEAN_TYPE;
  	}
  }
  