/* ****************************************************************************
 *
 * Copyright (c) Microsoft Corporation. 
 *
 * This source code is subject to terms and conditions of the Microsoft Public License. A 
 * copy of the license can be found in the License.html file at the root of this distribution. If 
 * you cannot locate the  Microsoft Public License, please send an email to 
 * dlr@microsoft.com. By using this source code in any fashion, you are agreeing to be bound 
 * by the terms of the Microsoft Public License.
 *
 * You must not remove this notice, or any other, from this software.
 *
 *
 * ***************************************************************************/
using System; using Microsoft;


using System.Collections;
using System.Collections.Generic;
using System.Diagnostics;
#if CODEPLEX_40
using System.Linq.Expressions;
#else
using Microsoft.Linq.Expressions;
#endif

#if CODEPLEX_40
namespace System.Dynamic {
#else
namespace Microsoft.Scripting {
#endif
    internal static class ContractUtils {
        internal static void Requires(bool precondition, string paramName) {
            Assert.NotEmpty(paramName);

            if (!precondition) {
                throw new ArgumentException(Strings.InvalidArgumentValue, paramName);
            }
        }

        internal static void Requires(bool precondition, string paramName, string message) {
            Assert.NotEmpty(paramName);

            if (!precondition) {
                throw new ArgumentException(message, paramName);
            }
        }

        internal static void RequiresNotNull(object value, string paramName) {
            Assert.NotEmpty(paramName);

            if (value == null) {
                throw new ArgumentNullException(paramName);
            }
        }
    }
}
