/*
 * Copyright (c) 2017, 2020, Oracle and/or its affiliates.
 *
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the above copyright notice, this list of
 * conditions and the following disclaimer.
 *
 * 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.
 *
 * 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
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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 */
package com.oracle.truffle.llvm.runtime.types;

import com.oracle.truffle.llvm.runtime.GetStackSpaceFactory;
import com.oracle.truffle.llvm.runtime.NodeFactory;
import com.oracle.truffle.llvm.runtime.datalayout.DataLayout;
import com.oracle.truffle.llvm.runtime.except.LLVMParserException;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.types.visitors.TypeVisitor;

public final class VoidType extends Type {

    public static final VoidType INSTANCE = new VoidType();

    private VoidType() {
        // private constructor
    }

    @Override
    public long getBitSize() {
        return 0;
    }

    @Override
    public void accept(TypeVisitor visitor) {
        visitor.visit(this);
    }

    @Override
    public int getAlignment(DataLayout targetDataLayout) {
        return 0;
    }

    @Override
    public long getSize(DataLayout targetDataLayout) {
        return 0;
    }

    @Override
    public String toString() {
        return "void";
    }

    @Override
    public boolean equals(Object obj) {
        return obj == this;
    }

    @Override
    public int hashCode() {
        return 123;
    }

    @Override
    public LLVMExpressionNode createNullConstant(NodeFactory nodeFactory, DataLayout dataLayout, GetStackSpaceFactory stackFactory) {
        throw new LLVMParserException("Unsupported Type for Zero Constant: " + this);
    }
}