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 * Copyright (c) 2019, 2020, Oracle and/or its affiliates.
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 * permitted provided that the following conditions are met:
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 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright notice, this list of
 * conditions and the following disclaimer in the documentation and/or other materials provided
 * with the distribution.
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 * 3. Neither the name of the copyright holder nor the names of its contributors may be used to
 * endorse or promote products derived from this software without specific prior written
 * permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND ANY EXPRESS
 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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package com.oracle.truffle.llvm.runtime.debug.debugexpr.nodes;

import com.oracle.truffle.api.CompilerDirectives.TruffleBoundary;
import com.oracle.truffle.api.frame.VirtualFrame;
import com.oracle.truffle.api.nodes.ExecutableNode;
import com.oracle.truffle.llvm.runtime.LLVMLanguage;
import com.oracle.truffle.llvm.runtime.debug.LLVMDebuggerValue;
import com.oracle.truffle.llvm.runtime.debug.debugexpr.parser.DebugExprException;
import com.oracle.truffle.llvm.runtime.except.LLVMParserException;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;

public class DebugExprExecutableNode extends ExecutableNode {
    @Child LLVMExpressionNode root;

    public DebugExprExecutableNode(LLVMExpressionNode root) {
        super(LLVMLanguage.getLanguage());
        this.root = root;
    }

    @TruffleBoundary
    private static String valueOf(Object objectToDisplay) {
        return String.valueOf(objectToDisplay);
    }

    @Override
    public Object execute(VirtualFrame frame) {
        try {
            // try to execute node
            Object objectToDisplay = root.executeGeneric(frame);
            if (objectToDisplay instanceof LLVMDebuggerValue) {
                return objectToDisplay;
            } else {
                return valueOf(objectToDisplay);
            }
        } catch (DebugExprException | LLVMParserException e) {
            // return message of exception that occurred during AST execution
            return e.getMessage();
        }
    }

}