/*
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * The Universal Permissive License (UPL), Version 1.0
 *
 * Subject to the condition set forth below, permission is hereby granted to any
 * person obtaining a copy of this software, associated documentation and/or
 * data (collectively the "Software"), free of charge and under any and all
 * copyright rights in the Software, and any and all patent rights owned or
 * freely licensable by each licensor hereunder covering either (i) the
 * unmodified Software as contributed to or provided by such licensor, or (ii)
 * the Larger Works (as defined below), to deal in both
 *
 * (a) the Software, and
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 * (b) any piece of software and/or hardware listed in the lrgrwrks.txt file if
 * one is included with the Software each a "Larger Work" to which the Software
 * is contributed by such licensors),
 *
 * without restriction, including without limitation the rights to copy, create
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 * Software and the Larger Work(s), and to sublicense the foregoing rights on
 * either these or other terms.
 *
 * This license is subject to the following condition:
 *
 * The above copyright notice and either this complete permission notice or at a
 * minimum a reference to the UPL must be included in all copies or substantial
 * portions of the Software.
 *
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 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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package com.oracle.truffle.api.utilities;

import com.oracle.truffle.api.Assumption;
import com.oracle.truffle.api.nodes.InvalidAssumptionException;

An assumption that is always valid. Used as a placeholder where an assumption is needed but never
invalidated.
Since:
0.8 or earlier/**
 * An assumption that is always valid. Used as a placeholder where an assumption is needed but never
 * invalidated.
 *
 * @since 0.8 or earlier
 */
public final class AlwaysValidAssumption implements Assumption {
    
Since:
0.8 or earlier/** @since 0.8 or earlier */
    public static final AlwaysValidAssumption INSTANCE = new AlwaysValidAssumption();

    private AlwaysValidAssumption() {
    }

    
Since:
0.8 or earlier/** @since 0.8 or earlier */
    @Override
    public void check() throws InvalidAssumptionException {
    }

    
Since:
0.8 or earlier/** @since 0.8 or earlier */
    @Override
    public void invalidate() {
        throw new UnsupportedOperationException("Cannot invalidate this assumption - it is always valid");
    }

    
Since:
0.33/** @since 0.33 */
    @Override
    public void invalidate(String message) {
        invalidate();
    }

    
Since:
0.8 or earlier/** @since 0.8 or earlier */
    @Override
    public String getName() {
        return getClass().getName();
    }

    
Since:
0.8 or earlier/** @since 0.8 or earlier */
    @Override
    public boolean isValid() {
        return true;
    }

}