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package com.oracle.graal.python.nodes.function;

import com.oracle.graal.python.nodes.expression.ExpressionNode;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.StandardTags;
import com.oracle.truffle.api.instrumentation.Tag;

/**
 * Lambda bodies, unlike regular functions, are expressions. We wrap the expression in write
 * local/generator variable node that writes the artificial return slot. This write node is a child
 * of the {@link com.oracle.graal.python.nodes.control.ReturnTargetNode}. We want this expression to
 * have the body tag.
 */
public class LambdaBodyNode extends ExpressionNode {
    @Child private ExpressionNode expression;

    public LambdaBodyNode(ExpressionNode expression) {
        this.expression = expression;
    }

    @Override
    public Object execute(VirtualFrame frame) {
        return expression.execute(frame);
    }

    @Override
    public boolean hasTag(Class<? extends Tag> tag) {
        return StandardTags.RootBodyTag.class == tag;
    }
}
