com.oracle.truffle.js.nodes.function.NamedEvaluationNode Maven / Gradle / Ivy

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package com.oracle.truffle.js.nodes.function;

import java.util.Set;

import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.instrumentation.Tag;
import com.oracle.truffle.js.nodes.JavaScriptNode;

/**
 * Represent a NamedEvaluation with a name that is computed / not already known at parse time.
 */
public class NamedEvaluationNode extends JavaScriptNode {
    @Child protected JavaScriptNode nameNode;
    @Child protected JavaScriptNode expressionNode;
    @Child SetFunctionNameNode setFunctionNameNode;

    protected NamedEvaluationNode(JavaScriptNode expressionNode, JavaScriptNode nameNode) {
        this.nameNode = nameNode;
        this.expressionNode = expressionNode;
        this.setFunctionNameNode = expressionNode instanceof NamedEvaluationTargetNode ? null : SetFunctionNameNode.create();
    }

    public static JavaScriptNode create(JavaScriptNode expressionNode, JavaScriptNode nameNode) {
        return new NamedEvaluationNode(expressionNode, nameNode);
    }

    @Override
    public Object execute(VirtualFrame frame) {
        Object name = nameNode.execute(frame);
        return executeWithName(frame, name);
    }

    public Object executeWithName(VirtualFrame frame, Object name) {
        Object function;
        if (expressionNode instanceof NamedEvaluationTargetNode) {
            assert setFunctionNameNode == null;
            function = ((NamedEvaluationTargetNode) expressionNode).executeWithName(frame, name);
        } else {
            function = expressionNode.execute(frame);
            setFunctionNameNode.execute(function, name);
        }
        return function;
    }

    @Override
    protected JavaScriptNode copyUninitialized(Set> materializedTags) {
        return create(cloneUninitialized(expressionNode, materializedTags), cloneUninitialized(nameNode, materializedTags));
    }
}