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73 lines
2.6 KiB
73 lines
2.6 KiB
5 years ago
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#if NET20 || NET30 || NET35 || NET40 || !NET_4_6
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// Licensed to the .NET Foundation under one or more agreements.
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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System.Diagnostics;
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using System.Diagnostics.Contracts;
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using System.Security;
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namespace System.Runtime.CompilerServices
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{
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internal static class ContractHelperEx
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{
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[SecuritySafeCritical]
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internal static void Fail(string message)
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{
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if (Debugger.IsAttached)
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{
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Debugger.Break();
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}
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else
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{
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Environment.FailFast(message);
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}
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}
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internal static string GetFailureMessage(ContractFailureKind failureKind)
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{
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return GetFailureMessage(failureKind, "");
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}
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internal static string GetFailureMessage(ContractFailureKind failureKind, string conditionText)
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{
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string result;
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var withCondition = !string.IsNullOrEmpty(conditionText);
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switch (failureKind)
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{
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case ContractFailureKind.Assert:
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result = withCondition ? string.Format("Assertion failed: {0}", conditionText) : "Assertion failed.";
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break;
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case ContractFailureKind.Assume:
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result = withCondition ? string.Format("Assumption failed: {0}", conditionText) : "Assumption failed.";
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break;
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case ContractFailureKind.Precondition:
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result = withCondition ? string.Format("Precondition failed: {0}", conditionText) : "Precondition failed.";
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break;
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case ContractFailureKind.Postcondition:
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result = withCondition ? string.Format("Postcondition failed: {0}", conditionText) : "Postcondition failed.";
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break;
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case ContractFailureKind.Invariant:
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result = withCondition ? string.Format("Invariant failed: {0}", conditionText) : "Invariant failed.";
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break;
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case ContractFailureKind.PostconditionOnException:
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result = withCondition ? string.Format("Postcondition failed after throwing an exception: {0}", conditionText) : "Postcondition failed after throwing an exception.";
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break;
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default:
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result = "Assumption failed.";
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Contract.Assume(false, "Unreachable code");
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break;
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}
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return result;
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}
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}
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}
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#endif
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