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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
#nullable disable
using System;
using System.Collections.Generic;
using System.Collections.Immutable;
using System.Globalization;
using System.Linq;
using System.Runtime.InteropServices;
using Microsoft.CodeAnalysis.CSharp.Syntax;
using Microsoft.CodeAnalysis.CSharp.Symbols;
using Microsoft.CodeAnalysis.CSharp.Test.Utilities;
using Microsoft.CodeAnalysis.Emit;
using Microsoft.CodeAnalysis.Test.Utilities;
using Microsoft.CodeAnalysis.Text;
using Roslyn.Test.Utilities;
using Roslyn.Utilities;
using Xunit;
namespace Microsoft.CodeAnalysis.CSharp.UnitTests
{
public partial class DiagnosticTest : CSharpTestBase
{
/// <summary>
/// Ensure string resources are included.
/// </summary>
[Fact]
public void Resources()
{
var excludedErrorCodes = new[]
{
ErrorCode.Void,
ErrorCode.Unknown,
ErrorCode.WRN_ALinkWarn, // Not reported, but retained to allow configuring class of related warnings. See CSharpDiagnosticFilter.Filter.
};
foreach (ErrorCode code in Enum.GetValues(typeof(ErrorCode)))
{
if (Array.IndexOf(excludedErrorCodes, code) >= 0)
{
continue;
}
Assert.False(string.IsNullOrEmpty(ErrorFacts.GetMessage(code, CultureInfo.InvariantCulture)), $"Message for error {code} is null or empty.");
}
}
/// <summary>
/// ErrorCode should not have duplicates.
/// </summary>
[Fact]
public void NoDuplicates()
{
var values = Enum.GetValues(typeof(ErrorCode));
var set = new HashSet<ErrorCode>();
foreach (ErrorCode value in values)
{
Assert.True(set.Add(value), $"{value} is duplicated!");
}
}
[Fact]
public void TestDiagnostic()
{
MockMessageProvider provider = new MockMessageProvider();
SyntaxTree syntaxTree = new MockCSharpSyntaxTree();
CultureInfo englishCulture = CultureHelpers.EnglishCulture;
DiagnosticInfo di1 = new DiagnosticInfo(provider, 1);
Assert.Equal(1, di1.Code);
Assert.Equal(DiagnosticSeverity.Error, di1.Severity);
Assert.Equal("MOCK0001", di1.MessageIdentifier);
Assert.Equal("The first error", di1.GetMessage(englishCulture));
DiagnosticInfo di2 = new DiagnosticInfo(provider, 1002, "Elvis", "Mort");
Assert.Equal(1002, di2.Code);
Assert.Equal(DiagnosticSeverity.Warning, di2.Severity);
Assert.Equal("MOCK1002", di2.MessageIdentifier);
Assert.Equal("The second warning about Elvis and Mort", di2.GetMessage(englishCulture));
Location l1 = new SourceLocation(syntaxTree, new TextSpan(5, 8));
var d1 = new CSDiagnostic(di2, l1);
Assert.Equal(l1, d1.Location);
Assert.Same(syntaxTree, d1.Location.SourceTree);
Assert.Equal(new TextSpan(5, 8), d1.Location.SourceSpan);
Assert.Equal(0, d1.AdditionalLocations.Count());
Assert.Same(di2, d1.Info);
}
[Fact]
public void TestCustomErrorInfo()
{
MockMessageProvider provider = new MockMessageProvider();
SyntaxTree syntaxTree = new MockCSharpSyntaxTree();
DiagnosticInfo di3 = new CustomErrorInfo(provider, "OtherSymbol", new SourceLocation(syntaxTree, new TextSpan(14, 8)));
var d3 = new CSDiagnostic(di3, new SourceLocation(syntaxTree, new TextSpan(1, 1)));
Assert.Same(syntaxTree, d3.Location.SourceTree);
Assert.Equal(new TextSpan(1, 1), d3.Location.SourceSpan);
Assert.Equal(1, d3.AdditionalLocations.Count());
Assert.Equal(new TextSpan(14, 8), d3.AdditionalLocations.First().SourceSpan);
Assert.Equal("OtherSymbol", (d3.Info as CustomErrorInfo).OtherSymbol);
}
[Fact, WorkItem(66037, "https://github.com/dotnet/roslyn/issues/66037")]
public void DiagnosticInfo_WithSeverity()
{
var comp = CreateCompilation("");
var args = new object[] { comp.GlobalNamespace };
var symbol = (Symbol)comp.GlobalNamespace;
var type = TypeWithAnnotations.Create(comp.GetSpecialType(SpecialType.System_Object));
verifyWithSeverity(new CSDiagnosticInfo(ErrorCode.ERR_AbstractField));
verifyWithSeverity(new DiagnosticInfoWithSymbols(ErrorCode.ERR_DuplicateTypeParameter, args,
ImmutableArray.Create(symbol)));
verifyWithSeverity(new LazyArrayElementCantBeRefAnyDiagnosticInfo(type));
verifyWithSeverity(new LazyObsoleteDiagnosticInfo(symbol, symbol, BinderFlags.None));
verifyWithSeverity(new LazyUseSiteDiagnosticsInfoForNullableType(LanguageVersion.CSharp11, type));
verifyWithSeverity(new SyntaxDiagnosticInfo(1, 2, ErrorCode.ERR_DuplicateTypeParameter, args));
verifyWithSeverity(new XmlSyntaxDiagnosticInfo(XmlParseErrorCode.XML_EndTagExpected, args));
static void verifyWithSeverity(DiagnosticInfo diagnostic)
{
var other = diagnostic.GetInstanceWithSeverity(DiagnosticSeverity.Info);
Assert.NotSame(diagnostic, other);
Assert.Equal(DiagnosticSeverity.Info, other.Severity);
Assert.Same(diagnostic, diagnostic.GetInstanceWithSeverity(diagnostic.Severity));
}
}
[WorkItem(537801, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/537801")]
[Fact]
public void MissingNamespaceOpenBracket()
{
var text = @"namespace NS
interface ITest {
void Method();
}
End namespace
";
var comp = CreateCompilation(text);
var actualErrors = comp.GetDiagnostics();
Assert.InRange(actualErrors.Count(), 1, int.MaxValue);
}
[WorkItem(540086, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540086")]
[Fact]
public void ErrorApplyIndexingToMethod()
{
var text = @"using System;
public class A
{
static void Main(string[] args)
{
Console.WriteLine(goo[0]);
}
static int[] goo()
{
return new int[0];
}
}";
var comp = DiagnosticsUtils.VerifyErrorsAndGetCompilationWithMscorlib(text,
new ErrorDescription { Code = (int)ErrorCode.ERR_BadIndexLHS, Line = 6, Column = 27 });
text = @"
public class A
{
static void Main(string[] args)
{
}
void goo(object o)
{
System.Console.WriteLine(o.GetType().GetMethods[0].Name);
}
}";
comp = DiagnosticsUtils.VerifyErrorsAndGetCompilationWithMscorlib(text,
new ErrorDescription { Code = (int)ErrorCode.ERR_BadIndexLHS, Line = 10, Column = 34 });
}
[WorkItem(540329, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/540329")]
[Fact]
public void ErrorMemberAccessOnLiteralToken()
{
var text = @"
class X
{
static void Main()
{
// this statement should produce an error
int x = null.Length;
// this statement is valid
string three = 3.ToString();
}
}";
CreateCompilation(text).VerifyDiagnostics(
// (6,17): error CS0023: Operator '.' cannot be applied to operand of type '<null>'
Diagnostic(ErrorCode.ERR_BadUnaryOp, @"null.Length").WithArguments(".", "<null>"));
}
[WorkItem(542911, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542911")]
[Fact]
public void WarningLevel_1()
{
foreach (ErrorCode errorCode in Enum.GetValues(typeof(ErrorCode)))
{
string errorCodeName = errorCode.ToString();
if (errorCodeName.StartsWith("WRN", StringComparison.Ordinal))
{
Assert.True(ErrorFacts.IsWarning(errorCode));
Assert.NotEqual(0, ErrorFacts.GetWarningLevel(errorCode));
}
else if (errorCodeName.StartsWith("ERR", StringComparison.Ordinal))
{
Assert.False(ErrorFacts.IsWarning(errorCode));
Assert.Equal(0, ErrorFacts.GetWarningLevel(errorCode));
}
}
}
[WorkItem(542911, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/542911")]
[Fact]
public void WarningLevel_2()
{
// Check a few warning levels recently added
Assert.Equal(2, ErrorFacts.GetWarningLevel(ErrorCode.WRN_DeprecatedCollectionInitAddStr));
Assert.Equal(1, ErrorFacts.GetWarningLevel(ErrorCode.WRN_DefaultValueForUnconsumedLocation));
Assert.Equal(2, ErrorFacts.GetWarningLevel(ErrorCode.WRN_UnmatchedParamRefTag));
Assert.Equal(2, ErrorFacts.GetWarningLevel(ErrorCode.WRN_UnmatchedTypeParamRefTag));
Assert.Equal(1, ErrorFacts.GetWarningLevel(ErrorCode.WRN_ReferencedAssemblyReferencesLinkedPIA));
Assert.Equal(2, ErrorFacts.GetWarningLevel(ErrorCode.WRN_DynamicDispatchToConditionalMethod));
Assert.Equal(3, ErrorFacts.GetWarningLevel(ErrorCode.WRN_IsDynamicIsConfusing));
Assert.Equal(2, ErrorFacts.GetWarningLevel(ErrorCode.WRN_NoSources));
// If a new warning is added, this test will fail and adding the new case with the expected error level will be required.
foreach (ErrorCode errorCode in Enum.GetValues(typeof(ErrorCode)))
{
if ((int)errorCode < 7000)
{
continue;
}
string errorCodeName = errorCode.ToString();
if (errorCodeName.StartsWith("WRN", StringComparison.Ordinal))
{
Assert.True(ErrorFacts.IsWarning(errorCode));
switch (errorCode)
{
case ErrorCode.WRN_DelaySignButNoKey:
case ErrorCode.WRN_AttributeIgnoredWhenPublicSigning:
case ErrorCode.WRN_UnimplementedCommandLineSwitch:
case ErrorCode.WRN_CallerFilePathPreferredOverCallerMemberName:
case ErrorCode.WRN_CallerLineNumberPreferredOverCallerMemberName:
case ErrorCode.WRN_CallerLineNumberPreferredOverCallerFilePath:
case ErrorCode.WRN_AssemblyAttributeFromModuleIsOverridden:
case ErrorCode.WRN_RefCultureMismatch:
case ErrorCode.WRN_ConflictingMachineAssembly:
case ErrorCode.WRN_FilterIsConstantFalse:
case ErrorCode.WRN_FilterIsConstantTrue:
case ErrorCode.WRN_FilterIsConstantFalseRedundantTryCatch:
case ErrorCode.WRN_AnalyzerCannotBeCreated:
case ErrorCode.WRN_NoAnalyzerInAssembly:
case ErrorCode.WRN_UnableToLoadAnalyzer:
case ErrorCode.WRN_ReferencedAssemblyDoesNotHaveStrongName:
case ErrorCode.WRN_AlignmentMagnitude:
case ErrorCode.WRN_TupleLiteralNameMismatch:
case ErrorCode.WRN_WindowsExperimental:
case ErrorCode.WRN_AttributesOnBackingFieldsNotAvailable:
case ErrorCode.WRN_TupleBinopLiteralNameMismatch:
case ErrorCode.WRN_TypeParameterSameAsOuterMethodTypeParameter:
case ErrorCode.WRN_SwitchExpressionNotExhaustive:
case ErrorCode.WRN_IsTypeNamedUnderscore:
case ErrorCode.WRN_GivenExpressionNeverMatchesPattern:
case ErrorCode.WRN_GivenExpressionAlwaysMatchesConstant:
case ErrorCode.WRN_UnconsumedEnumeratorCancellationAttributeUsage:
case ErrorCode.WRN_UndecoratedCancellationTokenParameter:
case ErrorCode.WRN_SwitchExpressionNotExhaustiveWithWhen:
case ErrorCode.WRN_SwitchExpressionNotExhaustiveWithUnnamedEnumValue:
case ErrorCode.WRN_RecordNamedDisallowed:
case ErrorCode.WRN_ParameterNotNullIfNotNull:
case ErrorCode.WRN_ReturnNotNullIfNotNull:
case ErrorCode.WRN_UnreadRecordParameter:
case ErrorCode.WRN_DoNotCompareFunctionPointers:
case ErrorCode.WRN_ParameterOccursAfterInterpolatedStringHandlerParameter:
case ErrorCode.WRN_CallerArgumentExpressionParamForUnconsumedLocation:
case ErrorCode.WRN_CallerLineNumberPreferredOverCallerArgumentExpression:
case ErrorCode.WRN_CallerFilePathPreferredOverCallerArgumentExpression:
case ErrorCode.WRN_CallerMemberNamePreferredOverCallerArgumentExpression:
case ErrorCode.WRN_CallerArgumentExpressionAttributeHasInvalidParameterName:
case ErrorCode.WRN_CallerArgumentExpressionAttributeSelfReferential:
case ErrorCode.WRN_ObsoleteMembersShouldNotBeRequired:
case ErrorCode.WRN_OptionalParamValueMismatch:
case ErrorCode.WRN_ParamsArrayInLambdaOnly:
case ErrorCode.WRN_CapturedPrimaryConstructorParameterPassedToBase:
case ErrorCode.WRN_UnreadPrimaryConstructorParameter:
case ErrorCode.WRN_InterceptorSignatureMismatch:
case ErrorCode.WRN_NullabilityMismatchInReturnTypeOnInterceptor:
case ErrorCode.WRN_NullabilityMismatchInParameterTypeOnInterceptor:
case ErrorCode.WRN_CapturedPrimaryConstructorParameterInFieldInitializer:
case ErrorCode.WRN_PrimaryConstructorParameterIsShadowedAndNotPassedToBase:
case ErrorCode.WRN_InlineArrayIndexerNotUsed:
case ErrorCode.WRN_InlineArraySliceNotUsed:
case ErrorCode.WRN_InlineArrayConversionOperatorNotUsed:
case ErrorCode.WRN_InlineArrayNotSupportedByLanguage:
case ErrorCode.WRN_BadArgRef:
case ErrorCode.WRN_ArgExpectedRefOrIn:
case ErrorCode.WRN_RefReadonlyNotVariable:
case ErrorCode.WRN_ArgExpectedIn:
case ErrorCode.WRN_OverridingDifferentRefness:
case ErrorCode.WRN_HidingDifferentRefness:
case ErrorCode.WRN_TargetDifferentRefness:
case ErrorCode.WRN_RefReadonlyParameterDefaultValue:
case ErrorCode.WRN_Experimental:
case ErrorCode.WRN_ExperimentalWithMessage:
case ErrorCode.WRN_ConvertingLock:
case ErrorCode.WRN_PartialPropertySignatureDifference:
case ErrorCode.WRN_UnscopedRefAttributeOldRules:
Assert.Equal(1, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_MainIgnored:
case ErrorCode.WRN_UnqualifiedNestedTypeInCref:
case ErrorCode.WRN_NoRuntimeMetadataVersion:
Assert.Equal(2, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_PdbLocalNameTooLong:
case ErrorCode.WRN_UnreferencedLocalFunction:
case ErrorCode.WRN_RecordEqualsWithoutGetHashCode:
Assert.Equal(3, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_ConvertingNullableToNonNullable:
case ErrorCode.WRN_NullReferenceAssignment:
case ErrorCode.WRN_NullReferenceReceiver:
case ErrorCode.WRN_NullReferenceReturn:
case ErrorCode.WRN_NullReferenceArgument:
case ErrorCode.WRN_DisallowNullAttributeForbidsMaybeNullAssignment:
case ErrorCode.WRN_NullabilityMismatchInTypeOnOverride:
case ErrorCode.WRN_NullabilityMismatchInReturnTypeOnOverride:
case ErrorCode.WRN_NullabilityMismatchInReturnTypeOnPartial:
case ErrorCode.WRN_NullabilityMismatchInParameterTypeOnOverride:
case ErrorCode.WRN_NullabilityMismatchInParameterTypeOnPartial:
case ErrorCode.WRN_NullabilityMismatchInConstraintsOnPartialImplementation:
case ErrorCode.WRN_NullabilityMismatchInTypeOnImplicitImplementation:
case ErrorCode.WRN_NullabilityMismatchInReturnTypeOnImplicitImplementation:
case ErrorCode.WRN_NullabilityMismatchInParameterTypeOnImplicitImplementation:
case ErrorCode.WRN_DuplicateInterfaceWithNullabilityMismatchInBaseList:
case ErrorCode.WRN_NullabilityMismatchInInterfaceImplementedByBase:
case ErrorCode.WRN_NullabilityMismatchInExplicitlyImplementedInterface:
case ErrorCode.WRN_NullabilityMismatchInTypeOnExplicitImplementation:
case ErrorCode.WRN_NullabilityMismatchInReturnTypeOnExplicitImplementation:
case ErrorCode.WRN_NullabilityMismatchInParameterTypeOnExplicitImplementation:
case ErrorCode.WRN_UninitializedNonNullableField:
case ErrorCode.WRN_NullabilityMismatchInAssignment:
case ErrorCode.WRN_NullabilityMismatchInArgument:
case ErrorCode.WRN_NullabilityMismatchInArgumentForOutput:
case ErrorCode.WRN_NullabilityMismatchInReturnTypeOfTargetDelegate:
case ErrorCode.WRN_NullabilityMismatchInParameterTypeOfTargetDelegate:
case ErrorCode.WRN_NullAsNonNullable:
case ErrorCode.WRN_NullableValueTypeMayBeNull:
case ErrorCode.WRN_NullabilityMismatchInTypeParameterConstraint:
case ErrorCode.WRN_MissingNonNullTypesContextForAnnotation:
case ErrorCode.WRN_MissingNonNullTypesContextForAnnotationInGeneratedCode:
case ErrorCode.WRN_NullabilityMismatchInConstraintsOnImplicitImplementation:
case ErrorCode.WRN_NullabilityMismatchInTypeParameterReferenceTypeConstraint:
case ErrorCode.WRN_CaseConstantNamedUnderscore:
case ErrorCode.ERR_FeatureInPreview:
case ErrorCode.WRN_ThrowPossibleNull:
case ErrorCode.WRN_UnboxPossibleNull:
case ErrorCode.WRN_SwitchExpressionNotExhaustiveForNull:
case ErrorCode.WRN_SwitchExpressionNotExhaustiveForNullWithWhen:
case ErrorCode.WRN_ImplicitCopyInReadOnlyMember:
case ErrorCode.WRN_NullabilityMismatchInTypeParameterNotNullConstraint:
case ErrorCode.WRN_NullReferenceInitializer:
case ErrorCode.WRN_ParameterConditionallyDisallowsNull:
case ErrorCode.WRN_ShouldNotReturn:
case ErrorCode.WRN_DoesNotReturnMismatch:
case ErrorCode.WRN_TopLevelNullabilityMismatchInReturnTypeOnImplicitImplementation:
case ErrorCode.WRN_TopLevelNullabilityMismatchInParameterTypeOnImplicitImplementation:
case ErrorCode.WRN_TopLevelNullabilityMismatchInReturnTypeOnExplicitImplementation:
case ErrorCode.WRN_TopLevelNullabilityMismatchInParameterTypeOnExplicitImplementation:
case ErrorCode.WRN_TopLevelNullabilityMismatchInReturnTypeOnOverride:
case ErrorCode.WRN_TopLevelNullabilityMismatchInParameterTypeOnOverride:
case ErrorCode.WRN_ConstOutOfRangeChecked:
case ErrorCode.WRN_MemberNotNull:
case ErrorCode.WRN_MemberNotNullWhen:
case ErrorCode.WRN_MemberNotNullBadMember:
case ErrorCode.WRN_GeneratorFailedDuringInitialization:
case ErrorCode.WRN_GeneratorFailedDuringGeneration:
case ErrorCode.WRN_ParameterDisallowsNull:
case ErrorCode.WRN_GivenExpressionAlwaysMatchesPattern:
case ErrorCode.WRN_IsPatternAlways:
case ErrorCode.WRN_AnalyzerReferencesFramework:
case ErrorCode.WRN_InterpolatedStringHandlerArgumentAttributeIgnoredOnLambdaParameters:
case ErrorCode.WRN_CompileTimeCheckedOverflow:
case ErrorCode.WRN_MethGrpToNonDel:
case ErrorCode.WRN_UnassignedThisAutoPropertySupportedVersion:
case ErrorCode.WRN_UnassignedThisSupportedVersion:
case ErrorCode.WRN_UseDefViolationPropertySupportedVersion:
case ErrorCode.WRN_UseDefViolationFieldSupportedVersion:
case ErrorCode.WRN_UseDefViolationThisSupportedVersion:
case ErrorCode.WRN_AnalyzerReferencesNewerCompiler:
case ErrorCode.WRN_DuplicateAnalyzerReference:
case ErrorCode.WRN_ScopedMismatchInParameterOfTarget:
case ErrorCode.WRN_ScopedMismatchInParameterOfOverrideOrImplementation:
case ErrorCode.WRN_ManagedAddr:
case ErrorCode.WRN_EscapeVariable:
case ErrorCode.WRN_EscapeStackAlloc:
case ErrorCode.WRN_RefReturnNonreturnableLocal:
case ErrorCode.WRN_RefReturnNonreturnableLocal2:
case ErrorCode.WRN_RefReturnStructThis:
case ErrorCode.WRN_RefAssignNarrower:
case ErrorCode.WRN_MismatchedRefEscapeInTernary:
case ErrorCode.WRN_RefReturnParameter:
case ErrorCode.WRN_RefReturnScopedParameter:
case ErrorCode.WRN_RefReturnParameter2:
case ErrorCode.WRN_RefReturnScopedParameter2:
case ErrorCode.WRN_RefReturnLocal:
case ErrorCode.WRN_RefReturnLocal2:
case ErrorCode.WRN_RefAssignReturnOnly:
case ErrorCode.WRN_RefReturnOnlyParameter:
case ErrorCode.WRN_RefReturnOnlyParameter2:
case ErrorCode.WRN_RefAssignValEscapeWider:
case ErrorCode.WRN_UseDefViolationRefField:
case ErrorCode.WRN_CollectionExpressionRefStructMayAllocate:
case ErrorCode.WRN_CollectionExpressionRefStructSpreadMayAllocate:
case ErrorCode.INF_TooManyBoundLambdas:
case ErrorCode.WRN_FieldIsAmbiguous:
case ErrorCode.WRN_UninitializedNonNullableBackingField:
case ErrorCode.WRN_AccessorDoesNotUseBackingField:
case ErrorCode.WRN_InterceptsLocationAttributeUnsupportedSignature:
Assert.Equal(1, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_InvalidVersionFormat:
Assert.Equal(4, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_NubExprIsConstBool2:
case ErrorCode.WRN_StaticInAsOrIs:
case ErrorCode.WRN_PrecedenceInversion:
case ErrorCode.WRN_UnassignedThisAutoPropertyUnsupportedVersion:
case ErrorCode.WRN_UnassignedThisUnsupportedVersion:
case ErrorCode.WRN_ParamUnassigned:
case ErrorCode.WRN_UseDefViolationProperty:
case ErrorCode.WRN_UseDefViolationField:
case ErrorCode.WRN_UseDefViolationPropertyUnsupportedVersion:
case ErrorCode.WRN_UseDefViolationFieldUnsupportedVersion:
case ErrorCode.WRN_UseDefViolationThisUnsupportedVersion:
case ErrorCode.WRN_UseDefViolationOut:
case ErrorCode.WRN_UseDefViolation:
case ErrorCode.WRN_SyncAndAsyncEntryPoints:
case ErrorCode.WRN_ParameterIsStaticClass:
case ErrorCode.WRN_ReturnTypeIsStaticClass:
// These are the warnings introduced with the warning "wave" shipped with dotnet 5 and C# 9.
Assert.Equal(5, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_PartialMethodTypeDifference:
// These are the warnings introduced with the warning "wave" shipped with dotnet 6 and C# 10.
Assert.Equal(6, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_LowerCaseTypeName:
// These are the warnings introduced with the warning "wave" shipped with dotnet 7 and C# 11.
Assert.Equal(7, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_AddressOfInAsync:
case ErrorCode.WRN_ByValArraySizeConstRequired:
// These are the warnings introduced with the warning "wave" shipped with dotnet 8 and C# 12.
Assert.Equal(8, ErrorFacts.GetWarningLevel(errorCode));
break;
case ErrorCode.WRN_UnassignedInternalRefField:
// These are the warnings introduced with the warning "wave" shipped with dotnet 10 and C# 14.
Assert.Equal(10, ErrorFacts.GetWarningLevel(errorCode));
break;
default:
// If a new warning is added, this test will fail
// and whoever is adding the new warning will have to update it with the expected error level.
Assert.True(false, $"Please update this test case with a proper warning level ({ErrorFacts.GetWarningLevel(errorCode)}) for '{errorCodeName}'");
break;
}
}
}
}
[Fact]
public void NullableWarnings()
{
foreach (ErrorCode error in Enum.GetValues(typeof(ErrorCode)))
{
if ((int)error < 8600 || (int)error >= 8912)
{
continue;
}
if (!error.ToString().StartsWith("WRN"))
{
// Only interested in warnings
continue;
}
if (ErrorFacts.NullableWarnings.Contains(MessageProvider.Instance.GetIdForErrorCode((int)error)))
{
continue;
}
// Nullable-unrelated warnings in the C# 8 range should be added to this array.
var nullableUnrelatedWarnings = new[]
{
ErrorCode.WRN_MissingNonNullTypesContextForAnnotation,
ErrorCode.WRN_MissingNonNullTypesContextForAnnotationInGeneratedCode,
ErrorCode.WRN_ImplicitCopyInReadOnlyMember,
ErrorCode.WRN_GeneratorFailedDuringInitialization,
ErrorCode.WRN_GeneratorFailedDuringGeneration,
ErrorCode.WRN_GivenExpressionAlwaysMatchesPattern,
ErrorCode.WRN_IsPatternAlways,
ErrorCode.WRN_ConstOutOfRangeChecked,
ErrorCode.WRN_SwitchExpressionNotExhaustiveWithWhen,
ErrorCode.WRN_PrecedenceInversion,
ErrorCode.WRN_UnassignedThisAutoPropertyUnsupportedVersion,
ErrorCode.WRN_UnassignedThisUnsupportedVersion,
ErrorCode.WRN_ParamUnassigned,
ErrorCode.WRN_UseDefViolationProperty,
ErrorCode.WRN_UseDefViolationField,
ErrorCode.WRN_UseDefViolationThisUnsupportedVersion,
ErrorCode.WRN_UseDefViolationOut,
ErrorCode.WRN_UseDefViolation,
ErrorCode.WRN_SyncAndAsyncEntryPoints,
ErrorCode.WRN_ParameterIsStaticClass,
ErrorCode.WRN_ReturnTypeIsStaticClass,
ErrorCode.WRN_RecordNamedDisallowed,
ErrorCode.WRN_RecordEqualsWithoutGetHashCode,
ErrorCode.WRN_AnalyzerReferencesFramework,
ErrorCode.WRN_UnreadRecordParameter,
ErrorCode.WRN_DoNotCompareFunctionPointers,
ErrorCode.WRN_PartialMethodTypeDifference,
ErrorCode.WRN_ParameterOccursAfterInterpolatedStringHandlerParameter
};
Assert.Contains(error, nullableUnrelatedWarnings);
}
}
[Fact]
public void Warning_1()
{
var text = @"
public class C
{
static private volatile int i;
static public void Test (ref int i) {}
public static void Main()
{
Test (ref i);
}
}
";
CreateCompilation(text, options: TestOptions.ReleaseExe).VerifyDiagnostics(
// (10,19): warning CS0420: 'C.i': a reference to a volatile field will not be treated as volatile
// Test (ref i);
Diagnostic(ErrorCode.WRN_VolatileByRef, "i").WithArguments("C.i"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(420), ReportDiagnostic.Suppress);
CSharpCompilationOptions option = TestOptions.ReleaseExe.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = TestOptions.ReleaseExe.WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (10,19): error CS0420: Warning as Error: 'C.i': a reference to a volatile field will not be treated as volatile
// Test (ref i);
Diagnostic(ErrorCode.WRN_VolatileByRef, "i").WithArguments("C.i").WithWarningAsError(true));
warnings[MessageProvider.Instance.GetIdForErrorCode(420)] = ReportDiagnostic.Error;
option = TestOptions.ReleaseExe.WithGeneralDiagnosticOption(ReportDiagnostic.Default).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (10,19): error CS0420: Warning as Error: 'C.i': a reference to a volatile field will not be treated as volatile
// Test (ref i);
Diagnostic(ErrorCode.WRN_VolatileByRef, "i").WithArguments("C.i").WithWarningAsError(true));
}
[Fact]
public void Warning_2()
{
var text = @"
public class C
{
public static void Main()
{
int x;
int j = 0;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (8,6): warning CS0168: The variable 'x' is declared but never used
// int x;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,6): warning CS0219: The variable 'j' is assigned but its value is never used
// int j = 0;
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "j").WithArguments("j"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Suppress);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (9,6): warning CS0219: The variable 'j' is assigned but its value is never used
// int j = 0;
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "j").WithArguments("j"));
warnings[MessageProvider.Instance.GetIdForErrorCode(168)] = ReportDiagnostic.Error;
option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,6): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,6): warning CS0219: The variable 'j' is assigned but its value is never used
// int j = 0;
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "j").WithArguments("j"));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,6): warning CS0168: The variable 'x' is declared but never used
// int x;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,6): warning CS0219: The variable 'j' is assigned but its value is never used
// int j = 0;
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "j").WithArguments("j"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NoErrorCodes1()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (10,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NoErrorCodes2()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning restore // comment
int x; // CS0168
int y = 0; // CS0219
#pragma warning disable // comment
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (8,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NumericErrorCodes1()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable 168
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore 168 // comment
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_IdentifierErrorCodes1()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable CS0168 // comment
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore CS0168
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NumericErrorCodes2()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning restore 168
int x; // CS0168
int y = 0; // CS0219
#pragma warning disable 168
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (9,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (10,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (9,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (10,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (9,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (10,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_IdentifierErrorCodes2()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning restore CS0168
int x; // CS0168
int y = 0; // CS0219
#pragma warning disable CS0168
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (9,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (10,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (9,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (10,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (9,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (10,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_IdentifierErrorCodesAreCaseSensitive()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable cs0168
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore cs0168
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13).WithWarningAsError(true),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13).WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_IdentifierErrorCodesMustMatchExactly1()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable CS168, CS0219L
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore CS0219L
int z; // CS0168
#pragma warning disable CS00168
int w; // CS0168
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13),
// (12,13): warning CS0168: The variable 'w' is declared but never used
// int w;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "w").WithArguments("w").WithLocation(12, 13));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13).WithWarningAsError(true),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13).WithWarningAsError(true),
// (12,13): error CS0168: Warning as Error: The variable 'w' is declared but never used
// int w;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "w").WithArguments("w").WithLocation(12, 13).WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13),
// (12,13): warning CS0168: The variable 'w' is declared but never used
// int w;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "w").WithArguments("w").WithLocation(12, 13));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_IdentifierErrorCodesMustMatchExactly2()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable ＣＳ０１６８
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore ＣＳ０１６８
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13).WithWarningAsError(true),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13).WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(7, 13),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(10, 13));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_BlockScopeIsNotSignificant1()
{
var text = @"
public class C
{
public static void Run()
{
#pragma warning disable
int _x; // CS0168
}
public static void Main()
{
int x; // CS0168
int y = 0; // CS0219
Run();
#pragma warning restore
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (12,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (17,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (12,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_BlockScopeIsNotSignificant2()
{
var text = @"
#pragma warning disable
public class C
{
public static void Run()
{
int _x; // CS0168
}
public static void Main()
{
int x; // CS0168
int y = 0; // CS0219
Run();
#pragma warning restore
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (11,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (16,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (11,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NumericAndIdentifierErrorCodes1()
{
var text = @"
#pragma warning disable 168, CS0219
public class C
{
public static void Run()
{
int _x; // CS0168
}
public static void Main()
{
int x; // CS0168
int y = 0; // CS0219
Run();
#pragma warning restore
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (12,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (17,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (12,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NumericAndIdentifierErrorCodes2()
{
var text = @"
#pragma warning disable 168, CS0219 // comment
public class C
{
public static void Run()
{
int _x; // CS0168
}
public static void Main()
{
int x; // CS0168
int y = 0; // CS0219
Run();
#pragma warning restore CS0219
int z;
}
}
";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics();
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NumericAndIdentifierErrorCodes3()
{
var text = @"
#pragma warning disable CS0465, 168, CS0219
public class C
{
public static void Run()
{
int _x; // CS0168
}
public virtual void Finalize() // CS0465
{
}
public static void Main()
{
int x; // CS0168
int y = 0; // CS0219
Run();
#pragma warning restore
int z;
}
}
";
// Verify that warnings can be disabled using a mixed list of numeric literals and identifier
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (20,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
var warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (20,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(3);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (20,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithGeneralDiagnosticOption(ReportDiagnostic.Error);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2).WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_BadSyntax1()
{
var text = @"
public class C
{
public static void Main()
{
#pragma
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore
int z;
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,8): warning CS1633: Unrecognized #pragma directive
// #pragma
Diagnostic(ErrorCode.WRN_IllegalPragma, ""),
// (8,17): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,17): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,17): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,8): warning CS1633: Unrecognized #pragma directive
// #pragma
Diagnostic(ErrorCode.WRN_IllegalPragma, ""),
// (8,17): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,17): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,17): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(1633), ReportDiagnostic.Suppress);
option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,17): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,17): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,17): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,8): warning CS1633: Unrecognized #pragma directive
// #pragma
Diagnostic(ErrorCode.WRN_IllegalPragma, ""));
}
[Fact]
public void PragmaWarning_BadSyntax2()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable 1633
#pragma
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore
int z;
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (8,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_BadSyntax3()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore
int z;
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,16): warning CS1634: Expected disable, restore, enable or safeonly
// #pragma warning
Diagnostic(ErrorCode.WRN_IllegalPPWarning, ""),
// (8,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,16): warning CS1634: Expected disable, restore, enable or safeonly
// #pragma warning
Diagnostic(ErrorCode.WRN_IllegalPPWarning, ""),
// (8,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,16): warning CS1634: Expected disable, restore, enable or safeonly
// #pragma warning
Diagnostic(ErrorCode.WRN_IllegalPPWarning, ""));
}
[Fact]
public void PragmaWarning_NoValidationForErrorCodes1()
{
// Previous versions of the compiler used to report a warning (CS1691)
// whenever an unrecognized warning code was supplied in a #pragma directive.
// We no longer generate a warning in such cases.
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable 1
#pragma warning disable CS168
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore all
int z;
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (10,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NoValidationForErrorCodes2()
{
// Previous versions of the compiler used to report a warning (CS1691)
// whenever an unrecognized warning code was supplied in a #pragma directive.
// We no longer generate a warning in such cases.
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable CS0001, 168, all
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore
int z;
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"),
// (11,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_NoValidationForErrorCodes3()
{
// Previous versions of the compiler used to report a warning (CS1691)
// whenever an unrecognized warning code was supplied in a #pragma directive.
// We no longer generate a warning in such cases.
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore 1
int z;
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics();
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics();
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_OnlyRestoreWithoutDisableIsNoOp()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning restore
int x; // CS0168
int y = 0; // CS0219
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (8,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
IDictionary<string, ReportDiagnostic> warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (8,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
warnings[MessageProvider.Instance.GetIdForErrorCode(168)] = ReportDiagnostic.Suppress;
option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics();
}
[Fact]
public void PragmaWarning_StringLiteralsAreNotAllowed()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable ""CS0168
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable "CS0168
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, @"""CS0168").WithLocation(7, 25),
// (8,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
var warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable "CS0168
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, @"""CS0168").WithLocation(7, 25),
// (8,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
warnings[MessageProvider.Instance.GetIdForErrorCode(168)] = ReportDiagnostic.Suppress;
option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable "CS0168
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, @"""CS0168").WithLocation(7, 25),
// (9,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y"));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (7,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable "CS0168
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, @"""CS0168").WithLocation(7, 25));
}
[Fact]
public void PragmaWarning_MostKeywordsAreAllowedAsErrorCodes()
{
// Lexing / parsing of identifiers inside #pragma is identical to that inside #define for the below cases.
// The #define cases below also produce no errors in previous versions of the compiler.
var text = @"
#define class
#define static
#define int
#define public
#define null
#define warning
#define define
public class C
{
public static void Main()
{
#pragma warning disable class, static, int
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore warning
#pragma warning restore public, null, define
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (12,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithLocation(14, 13),
// (13,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(15, 13));
}
/// <remarks>
/// See <see cref="SyntaxFacts.IsPreprocessorContextualKeyword"/>.
/// </remarks>
[Fact]
public void PragmaWarning_SomeKeywordsAreNotAllowedAsErrorCodes()
{
// A small number of keywords are not legal as error codes inside #pragma. This is because
// the lexer processes these keywords specially inside preprocessor directives i.e. it returns
// keyword tokens instead of identifier tokens for these.
// Lexing / parsing of identifiers inside #pragma is identical to that inside #define for the below cases.
// The #define cases below also produce identical errors in previous versions of the compiler.
var text = @"
#define true
#define default
#define hidden
#define disable
#define checksum
#define restore
#define false
public class C
{
public static void Main()
{
#pragma warning disable true
#pragma warning disable default
#pragma warning disable hidden
#pragma warning disable disable
#pragma warning restore checksum
#pragma warning restore restore
#pragma warning restore false
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (2,9): error CS1001: Identifier expected
// #define true
Diagnostic(ErrorCode.ERR_IdentifierExpected, "true").WithLocation(2, 9),
// (3,9): error CS1001: Identifier expected
// #define default
Diagnostic(ErrorCode.ERR_IdentifierExpected, "default").WithLocation(3, 9),
// (4,9): error CS1001: Identifier expected
// #define hidden
Diagnostic(ErrorCode.ERR_IdentifierExpected, "hidden").WithLocation(4, 9),
// (5,9): error CS1001: Identifier expected
// #define disable
Diagnostic(ErrorCode.ERR_IdentifierExpected, "disable").WithLocation(5, 9),
// (6,9): error CS1001: Identifier expected
// #define checksum
Diagnostic(ErrorCode.ERR_IdentifierExpected, "checksum").WithLocation(6, 9),
// (7,9): error CS1001: Identifier expected
// #define restore
Diagnostic(ErrorCode.ERR_IdentifierExpected, "restore").WithLocation(7, 9),
// (8,9): error CS1001: Identifier expected
// #define false
Diagnostic(ErrorCode.ERR_IdentifierExpected, "false").WithLocation(8, 9),
// (13,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable true
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "true").WithLocation(13, 25),
// (14,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable default
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "default").WithLocation(14, 25),
// (15,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable hidden
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "hidden").WithLocation(15, 25),
// (16,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable disable
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "disable").WithLocation(16, 25),
// (17,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore checksum
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "checksum").WithLocation(17, 25),
// (18,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore restore
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "restore").WithLocation(18, 25),
// (19,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore false
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "false").WithLocation(19, 25));
}
[Fact]
public void PragmaWarning_VeryLongIdentifiersAreAllowed()
{
var text = @"
#define __A_123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890
public class C
{
public static void Main()
{
#pragma warning disable __B_123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890, CS0168, CS0219
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore __B_123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789023456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678902345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890, CS0168, CS0219
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics();
var nodes = ParseWithRoundTripCheck(text).GetRoot().DescendantNodes(descendIntoTrivia: true);
var defineName = nodes.OfType<Syntax.DefineDirectiveTriviaSyntax>().Single().Name;
var errorCodeName = nodes.OfType<Syntax.PragmaWarningDirectiveTriviaSyntax>().First()
.ErrorCodes.OfType<Syntax.IdentifierNameSyntax>().First().Identifier;
// Lexing / parsing of identifiers inside #pragma warning directives is identical
// to that inside #define directives except that very long identifiers inside #define
// are truncated to 128 characters to maintain backwards compatibility with previous
// versions of the compiler.
Assert.Equal(128, defineName.ValueText.Length);
Assert.Equal(2335, defineName.Text.Length);
// Since support for identifiers inside #pragma warning directives is new,
// we don't have any backwards compatibility constraints. So we can preserve the
// identifier exactly as it appears in source.
Assert.Equal(2335, errorCodeName.ValueText.Length);
Assert.Equal(2335, errorCodeName.Text.Length);
}
[Fact]
public void PragmaWarning_EscapedKeywordsAreNotAllowedAsErrorCodes()
{
var text = @"
#define @true
#define @class
public class C
{
public static void Main()
{
#pragma warning disable @true
#pragma warning restore @class
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (2,9): error CS1001: Identifier expected
// #define @true
Diagnostic(ErrorCode.ERR_IdentifierExpected, "@").WithLocation(2, 9),
// (3,9): error CS1001: Identifier expected
// #define @class
Diagnostic(ErrorCode.ERR_IdentifierExpected, "@").WithLocation(3, 9),
// (8,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable @true
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "@").WithLocation(8, 25),
// (9,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore @class
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "@").WithLocation(9, 25));
}
[Fact]
public void PragmaWarning_ExpressionsAreNotAllowedAsErrorCodes()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable CS0168 + CS0219
int x; // CS0168
int y = 0; // CS0219
#pragma warning restore CS0168.Empty
#pragma warning disable (CS0168)
int z; // CS0168
#pragma warning restore -168
#pragma warning restore 168.1
#pragma warning restore 168L
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (6,32): warning CS1696: Single-line comment or end-of-line expected
// #pragma warning disable CS0168 + CS0219
Diagnostic(ErrorCode.WRN_EndOfPPLineExpected, "+").WithLocation(6, 32),
// (9,31): warning CS1696: Single-line comment or end-of-line expected
// #pragma warning restore CS0168.Empty
Diagnostic(ErrorCode.WRN_EndOfPPLineExpected, ".").WithLocation(9, 31),
// (11,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable (CS0168)
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "(").WithLocation(11, 25),
// (13,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore -168
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "-").WithLocation(13, 25),
// (14,28): warning CS1696: Single-line comment or end-of-line expected
// #pragma warning restore 168.1
Diagnostic(ErrorCode.WRN_EndOfPPLineExpected, ".").WithLocation(14, 28),
// (15,28): warning CS1696: Single-line comment or end-of-line expected
// #pragma warning restore 168L
Diagnostic(ErrorCode.WRN_EndOfPPLineExpected, "L").WithLocation(15, 28),
// (8,13): warning CS0219: The variable 'y' is assigned but its value is never used
// int y = 0; // CS0219
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(8, 13),
// (12,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithLocation(12, 13));
}
[Fact]
public void PragmaWarning_WarningsForBadPragmaSyntaxCanBeSuppressed()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable CS1072, CS1634
#pragma warning disable ~class
#pragma warning restore ""CS0219
#pragma warning blah
#pragma warning restore
#pragma warning disable @class
#pragma warning restore ""CS0168
#pragma warning blah
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (12,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable @class
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, "@").WithLocation(12, 25),
// (13,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore "CS0168
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, @"""CS0168").WithLocation(13, 25),
// (14,17): warning CS1634: Expected disable, restore, enable or safeonly
// #pragma warning blah
Diagnostic(ErrorCode.WRN_IllegalPPWarning, "blah").WithLocation(14, 17));
}
[Fact(Skip = "https://github.com/dotnet/roslyn/issues/36550")]
public void PragmaWarning_Enable()
{
var text1 = @"
class Test
{
void Main()
{
if (true)
{
int x;
}
else
{
return;
}
}
}
";
var expected1 = new DiagnosticDescription[]
{
// (8,17): warning CS0168: The variable 'x' is declared but never used
// int x;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (12,13): warning CS0162: Unreachable code detected
// return;
Diagnostic(ErrorCode.WRN_UnreachableCode, "return")
};
CreateCompilation(text1, parseOptions: TestOptions.Regular7_3).VerifyDiagnostics(expected1);
CreateCompilation(text1).VerifyDiagnostics(expected1);
var options = TestOptions.DebugDll.WithGeneralDiagnosticOption(ReportDiagnostic.Suppress);
CreateCompilation(text1, parseOptions: TestOptions.Regular7_3, options: options).VerifyDiagnostics();
CreateCompilation(text1, options: options).VerifyDiagnostics();
var text2 = @"
#pragma warning enable
" + text1;
CreateCompilation(text2, parseOptions: TestOptions.Regular7_3, options: options).VerifyDiagnostics(expected1);
CreateCompilation(text2, options: options).VerifyDiagnostics(expected1);
var text3 = @"
#pragma warning enable CS0168, 162
" + text1;
CreateCompilation(text3, parseOptions: TestOptions.Regular7_3, options: options).VerifyDiagnostics(expected1);
CreateCompilation(text3, options: options).VerifyDiagnostics(expected1);
var text4 = @"
#pragma warning enable CS0168
" + text1;
var expected2 = new DiagnosticDescription[]
{
// (8,17): warning CS0168: The variable 'x' is declared but never used
// int x;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x")
};
CreateCompilation(text4, parseOptions: TestOptions.Regular7_3, options: options).VerifyDiagnostics(expected2);
CreateCompilation(text4, options: options).VerifyDiagnostics(expected2);
var text5 = @"
#pragma warning enable 168
" + text1;
CreateCompilation(text5, parseOptions: TestOptions.Regular7_3, options: options).VerifyDiagnostics(expected2);
CreateCompilation(text5, options: options).VerifyDiagnostics(expected2);
}
[Fact]
public void PragmaWarning_ErrorsCantBeSuppressed()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable CS0029
int x = string.Empty;
#pragma warning restore CS0029
#pragma warning disable 29
int y = string.Empty;
#pragma warning restore 29
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (7,17): error CS0029: Cannot implicitly convert type 'string' to 'int'
// int x = string.Empty;
Diagnostic(ErrorCode.ERR_NoImplicitConv, "string.Empty").WithArguments("string", "int").WithLocation(7, 17),
// (10,17): error CS0029: Cannot implicitly convert type 'string' to 'int'
// int y = string.Empty;
Diagnostic(ErrorCode.ERR_NoImplicitConv, "string.Empty").WithArguments("string", "int").WithLocation(10, 17));
}
[Fact]
public void PragmaWarning_MissingErrorCodes()
{
var text = @"
public class C
{
public static void Main()
{
#pragma warning disable ,
int x; // CS0168
#pragma warning restore , ,
int z;
}
}";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics(
// (6,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,27): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (7,13): warning CS0168: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x"),
// (9,13): warning CS0168: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z"));
var warnings = new Dictionary<string, ReportDiagnostic>();
warnings.Add(MessageProvider.Instance.GetIdForErrorCode(168), ReportDiagnostic.Error);
CSharpCompilationOptions option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (6,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,27): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (7,13): error CS0168: Warning as Error: The variable 'x' is declared but never used
// int x; // CS0168
Diagnostic(ErrorCode.WRN_UnreferencedVar, "x").WithArguments("x").WithWarningAsError(true),
// (9,13): error CS0168: Warning as Error: The variable 'z' is declared but never used
// int z;
Diagnostic(ErrorCode.WRN_UnreferencedVar, "z").WithArguments("z").WithWarningAsError(true));
warnings[MessageProvider.Instance.GetIdForErrorCode(168)] = ReportDiagnostic.Suppress;
option = commonoption.WithSpecificDiagnosticOptions(warnings);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (6,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,27): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","));
option = commonoption.WithWarningLevel(2);
CreateCompilation(text, options: option).VerifyDiagnostics(
// (6,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning disable ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,25): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","),
// (8,27): warning CS1072: Expected identifier or numeric literal.
// #pragma warning restore , ,
Diagnostic(ErrorCode.WRN_IdentifierOrNumericLiteralExpected, ","));
}
[WorkItem(546814, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546814")]
[Fact]
public void PragmaWarning_NoValidationForErrorCodes4()
{
// Previous versions of the compiler used to report a warning (CS1691)
// whenever an unrecognized warning code was supplied in a #pragma directive.
// We no longer generate a warning in such cases.
var text = @"
using System;
class Program
{
#pragma warning disable 1691
#pragma warning disable 59526
public static void Main() { Console.Read(); }
#pragma warning restore 1691, 56529
} ";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics();
}
[WorkItem(546814, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/546814")]
[Fact]
public void PragmaWarning_NoValidationForErrorCodes5()
{
// Previous versions of the compiler used to report a warning (CS1691)
// whenever an unrecognized warning code was supplied in a #pragma directive.
// We no longer generate a warning in such cases.
var text = @"
using System;
class Program
{
#pragma warning disable 1691, 59526
public static void Main() { Console.Read(); }
#pragma warning restore 1691, 56529
} ";
CSharpCompilationOptions commonoption = TestOptions.ReleaseExe;
CreateCompilation(text, options: commonoption).VerifyDiagnostics();
}
[Fact]
public void PragmaWarningDirectiveMap()
{
var text = @"
using System;
public class C
{
#pragma warning disable
public static void Main()
#pragma warning restore 168
{
int x;
#pragma warning disable CS0168
int y; // CS0168
#pragma warning restore
int z = 0; // CS0219
}
}";
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree(text, path: "goo.cs");
Assert.Equal(PragmaWarningState.Default, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "public class").Start));
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "public static").Start));
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(219), GetSpanIn(syntaxTree, "public static").Start));
Assert.Equal(PragmaWarningState.Default, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "int x").Start));
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(219), GetSpanIn(syntaxTree, "int x").Start));
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "int y").Start));
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(219), GetSpanIn(syntaxTree, "int y").Start));
Assert.Equal(PragmaWarningState.Default, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "int z").Start));
Assert.Equal(PragmaWarningState.Default, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(219), GetSpanIn(syntaxTree, "int z").Start));
}
[Fact]
public void PragmaWarningDirectiveMapWithIfDirective()
{
var text = @"
using System;
class Program
{
static void Main(string[] args)
{
#pragma warning disable
var x = 10;
#if false
#pragma warning restore
#endif
var y = 10;
}
}";
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree(text, path: "goo.cs");
Assert.Equal(PragmaWarningState.Default, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "static void").Start));
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "var x").Start));
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(219), GetSpanIn(syntaxTree, "var y").Start));
}
[WorkItem(545407, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/545407")]
[Fact]
public void PragmaWarningDirectiveMapAtTheFirstLine()
{
var text = @"#pragma warning disable
using System;
class Program
{
static void Main(string[] args)
{
}
}";
SyntaxTree syntaxTree = SyntaxFactory.ParseSyntaxTree(text, path: "goo.cs");
Assert.Equal(PragmaWarningState.Disabled, syntaxTree.GetPragmaDirectiveWarningState(MessageProvider.Instance.GetIdForErrorCode(168), GetSpanIn(syntaxTree, "static void").Start));
}
private TextSpan GetSpanIn(SyntaxTree syntaxTree, string textToFind)
{
string s = syntaxTree.GetText().ToString();
int index = s.IndexOf(textToFind, StringComparison.Ordinal);
Assert.True(index >= 0, "textToFind not found in the tree");
return new TextSpan(index, textToFind.Length);
}
[WorkItem(543705, "http://vstfdevdiv:8080/DevDiv2/DevDiv/_workitems/edit/543705")]
[WorkItem(39992, "https://github.com/dotnet/roslyn/issues/39992")]
[Fact]
public void GetDiagnosticsCalledTwice()
{
var text = @"
interface IMyEnumerator { }
public class Test
{
static IMyEnumerator Goo()
{
yield break;
}
public static int Main()
{
return 1;
}
}";
var compilation = CreateCompilation(text);
Assert.Equal(1, compilation.GetDiagnostics().Length);
Assert.Equal(1, compilation.GetDiagnostics().Length);
}
[WorkItem(39992, "https://github.com/dotnet/roslyn/issues/39992")]
[Fact]
public void GetDiagnosticsCalledTwice_GetEmitDiagnostics()
{
var text = @"
interface IMyEnumerator { }
public class Test
{
static IMyEnumerator Goo()
{
yield break;
}
public static int Main()
{
return 1;
}
}";
var compilation = CreateCompilation(text);
var expected = new DiagnosticDescription[] {
// (6,26): error CS1624: The body of 'Test.Goo()' cannot be an iterator block because 'IMyEnumerator' is not an iterator interface type
// static IMyEnumerator Goo()
Diagnostic(ErrorCode.ERR_BadIteratorReturn, "Goo").WithArguments("Test.Goo()", "IMyEnumerator").WithLocation(6, 26)
};
compilation.VerifyDiagnostics(expected);
compilation.VerifyEmitDiagnostics(expected);
}
[Fact]
public void TestArgumentEquality()
{
var text = @"
using System;
public class Test
{
public static void Main()
{
(Console).WriteLine();
}
}";
var tree = Parse(text);
// (8,10): error CS0119: 'Console' is a type, which is not valid in the given context
AssertEx.Equal(CreateCompilation(tree).GetDiagnostics(), CreateCompilation(tree).GetDiagnostics());
}
/// <summary>
/// Test that invalid type argument lists produce clean error messages
/// with minimal noise
/// </summary>
[WorkItem(7177, "https://github.com/dotnet/roslyn/issues/7177")]
[Fact]
public void InvalidTypeArgumentList()
{
var text = @"using System;
public class A
{
static void Main(string[] args)
{
// Invalid type arguments
object a1 = typeof(Action<0>);
object a2 = typeof(Action<static>);
// Valid type arguments
object a3 = typeof(Action<string>);
object a4 = typeof(Action<>);
// Invalid with multiple types
object a5 = typeof(Func<0,1>);
object a6 = typeof(Func<0,bool>);
object a7 = typeof(Func<static,bool>);
// Valid with multiple types
object a8 = typeof(Func<string,bool>);
object a9 = typeof(Func<,>);
// Invalid with nested types
object a10 = typeof(Action<Action<0>>);
object a11 = typeof(Action<Action<static>>);
object a12 = typeof(Action<Action<>>);
// Valid with nested types
object a13 = typeof(Action<Action<string>>);
}
}";
CSharpCompilationOptions options = TestOptions.ReleaseExe;
CreateCompilation(text, options: options).VerifyDiagnostics(
// (7,35): error CS1031: Type expected
// object a1 = typeof(Action<0>);
Diagnostic(ErrorCode.ERR_TypeExpected, "0").WithLocation(7, 35),
// (8,35): error CS1031: Type expected
// object a2 = typeof(Action<static>);
Diagnostic(ErrorCode.ERR_TypeExpected, "static").WithLocation(8, 35),
// (15,33): error CS1031: Type expected
// object a5 = typeof(Func<0,1>);
Diagnostic(ErrorCode.ERR_TypeExpected, "0").WithLocation(15, 33),
// (15,35): error CS1031: Type expected
// object a5 = typeof(Func<0,1>);
Diagnostic(ErrorCode.ERR_TypeExpected, "1").WithLocation(15, 35),
// (16,33): error CS1031: Type expected
// object a6 = typeof(Func<0,bool>);
Diagnostic(ErrorCode.ERR_TypeExpected, "0").WithLocation(16, 33),
// (17,33): error CS1031: Type expected
// object a7 = typeof(Func<static,bool>);
Diagnostic(ErrorCode.ERR_TypeExpected, "static").WithLocation(17, 33),
// (24,43): error CS1031: Type expected
// object a10 = typeof(Action<Action<0>>);
Diagnostic(ErrorCode.ERR_TypeExpected, "0").WithLocation(24, 43),
// (25,43): error CS1031: Type expected
// object a11 = typeof(Action<Action<static>>);
Diagnostic(ErrorCode.ERR_TypeExpected, "static").WithLocation(25, 43),
// (26,36): error CS7003: Unexpected use of an unbound generic name
// object a12 = typeof(Action<Action<>>);
Diagnostic(ErrorCode.ERR_UnexpectedUnboundGenericName, "Action<>").WithLocation(26, 36));
}
/// <summary>
/// Tests if CS0075 - "To cast a negative value, you must enclose the value in parentheses" is correctly emitted.
/// </summary>
[Fact]
public void PossibleBadNegCast()
{
var source = @"using System;
class Program
{
static void Main()
{
var y = (ConsoleColor) - 1;
var z = (System.ConsoleColor) - 1;
}
}";
var compilation = CreateCompilation(source);
compilation.VerifyDiagnostics(new[]
{
// (6,18): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var y = (ConsoleColor) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(6, 18),
// (6,17): error CS0075: To cast a negative value, you must enclose the value in parentheses.
// var y = (ConsoleColor) - 1;
Diagnostic(ErrorCode.ERR_PossibleBadNegCast, "(ConsoleColor) - 1").WithLocation(6, 17),
// (6,18): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var y = (ConsoleColor) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(6, 18),
// (7,18): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var z = (System.ConsoleColor) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "System.ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(7, 18),
// (7,17): error CS0075: To cast a negative value, you must enclose the value in parentheses.
// var z = (System.ConsoleColor) - 1;
Diagnostic(ErrorCode.ERR_PossibleBadNegCast, "(System.ConsoleColor) - 1").WithLocation(7, 17),
// (7,18): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var z = (System.ConsoleColor) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "System.ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(7, 18)
});
}
/// <summary>
/// Tests if fixing CS0075 - "To cast a negative value, you must enclose the value in parentheses" works. (fixed version of <see cref="PossibleBadNegCast"/>).
/// </summary>
[Fact]
public void PossibleBadNegCastFixed()
{
var source = @"using System;
class Program
{
static void Main()
{
var y = (ConsoleColor) (- 1);
var z = (System.ConsoleColor) (- 1);
}
}";
var compilation = CreateCompilation(source);
compilation.VerifyDiagnostics(new[]
{
// (6,13): warning CS0219: The variable 'y' is assigned but its value is never used
// var y = (ConsoleColor) (- 1);
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "y").WithArguments("y").WithLocation(6, 13),
// (7,13): warning CS0219: The variable 'z' is assigned but its value is never used
// var z = (System.ConsoleColor) (- 1);
Diagnostic(ErrorCode.WRN_UnreferencedVarAssg, "z").WithArguments("z").WithLocation(7, 13)
});
}
/// <summary>
/// Tests if CS0075 - "To cast a negative value, you must enclose the value in parentheses" is only emitted if the left side is (would be) a cast expression.
/// </summary>
[Fact]
public void PossibleBadNegCastNotEmitted()
{
var source = @"using System;
class Program
{
static void Main()
{
var w = ((ConsoleColor)) - 1;
var x = ConsoleColor - 1;
var y = ((System.ConsoleColor)) - 1;
var z = System.ConsoleColor - 1;
}
}";
var compilation = CreateCompilation(source);
compilation.VerifyDiagnostics(new[]
{
// (7,19): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var w = ((ConsoleColor)) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(7, 19),
// (7,19): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var w = ((ConsoleColor)) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(7, 19),
// (7,19): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var w = ((ConsoleColor)) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(7, 19),
// (8,17): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var x = ConsoleColor - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(8, 17),
// (9,19): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var y = ((System.ConsoleColor)) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "System.ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(9, 19),
// (9,19): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var y = ((System.ConsoleColor)) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "System.ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(9, 19),
// (9,19): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var y = ((System.ConsoleColor)) - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "System.ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(9, 19),
// (10,17): error CS0119: 'ConsoleColor' is a type, which is not valid in the given context
// var z = System.ConsoleColor - 1;
Diagnostic(ErrorCode.ERR_BadSKunknown, "System.ConsoleColor").WithArguments("System.ConsoleColor", "type").WithLocation(10, 17)
});
}
/// <summary>
/// Tests if CS0075 - "To cast a negative value, you must enclose the value in parentheses" is also emitted for dynamic casts.
/// </summary>
[Fact]
public void PossibleBadNegCastDynamic()
{
var source = @"class Program
{
static void Main()
{
var y = (dynamic) - 1;
var z = (@dynamic) - 1;
}
}";
var compilation = CreateCompilation(source);
compilation.VerifyDiagnostics(new[]
{
// (5,18): error CS0103: The name 'dynamic' does not exist in the current context
// var y = (dynamic) - 1;
Diagnostic(ErrorCode.ERR_NameNotInContext, "dynamic").WithArguments("dynamic").WithLocation(5, 18),
// (5,17): error CS0075: To cast a negative value, you must enclose the value in parentheses.
// var y = (dynamic) - 1;
Diagnostic(ErrorCode.ERR_PossibleBadNegCast, "(dynamic) - 1").WithLocation(5, 17),
// (6,18): error CS0103: The name 'dynamic' does not exist in the current context
// var z = (@dynamic) - 1;
Diagnostic(ErrorCode.ERR_NameNotInContext, "@dynamic").WithArguments("dynamic").WithLocation(6, 18),
// (6,17): error CS0075: To cast a negative value, you must enclose the value in parentheses.
// var z = (@dynamic) - 1;
Diagnostic(ErrorCode.ERR_PossibleBadNegCast, "(@dynamic) - 1").WithLocation(6, 17)
});
}
/// <summary>
/// Tests if CS0075 - "To cast a negative value, you must enclose the value in parentheses" is also emitted for dynamic casts when a local variable called 'dynamic' is defined.
/// </summary>
[Fact]
public void PossibleBadNegCastDynamicWithLocal()
{
var source = @"class Program
{
static void Main()
{
var dynamic = 1;
var y = (dynamic) - 1;
var z = (@dynamic) - 1;
}
}";
var compilation = CreateCompilation(source);
compilation.VerifyDiagnostics();
}
/// <summary>
/// Tests if CS0075 - "To cast a negative value, you must enclose the value in parentheses" is also emitted for dynamic casts when a method called 'dynamic' is defined.
/// </summary>
[Fact]
public void PossibleBadNegCastDynamicWithMethod()
{
var source = @"class Program
{
static void Main()
{
var y = (dynamic) - 1;
var z = (@dynamic) - 1;
}
static void dynamic() {}
}";
var compilation = CreateCompilation(source);
compilation.VerifyDiagnostics(new[]
{
// (5,17): error CS0019: Operator '-' cannot be applied to operands of type 'method group' and 'int'
// var y = (dynamic) - 1;
Diagnostic(ErrorCode.ERR_BadBinaryOps, "(dynamic) - 1").WithArguments("-", "method group", "int").WithLocation(5, 17),
// (6,17): error CS0019: Operator '-' cannot be applied to operands of type 'method group' and 'int'
// var z = (@dynamic) - 1;
Diagnostic(ErrorCode.ERR_BadBinaryOps, "(@dynamic) - 1").WithArguments("-", "method group", "int").WithLocation(6, 17)
});
}
#region Mocks
internal class CustomErrorInfo : DiagnosticInfo
{
public readonly object OtherSymbol;
public readonly Location OtherLocation;
public override IReadOnlyList<Location> AdditionalLocations
{
get
{
return new Location[1] { OtherLocation };
}
}
public CustomErrorInfo(CommonMessageProvider provider, object otherSymbol, Location otherLocation)
: base(provider, 2)
{
this.OtherSymbol = otherSymbol;
this.OtherLocation = otherLocation;
}
}
internal sealed class MockMessageProvider : TestMessageProvider
{
public override DiagnosticSeverity GetSeverity(int code)
{
if (code >= 1000)
{
return DiagnosticSeverity.Warning;
}
else
{
return DiagnosticSeverity.Error;
}
}
public override string LoadMessage(int code, CultureInfo language)
{
switch (code)
{
case 1:
return "The first error";
case 2:
return "The second error is associated with symbol {0}";
case 1001:
return "The first warning";
case 1002:
return "The second warning about {0} and {1}";
default:
return null;
}
}
public override LocalizableString GetDescription(int code)
{
return string.Empty;
}
public override LocalizableString GetTitle(int code)
{
return string.Empty;
}
public override LocalizableString GetMessageFormat(int code)
{
return string.Empty;
}
public override string GetHelpLink(int code)
{
return string.Empty;
}
public override string GetCategory(int code)
{
return string.Empty;
}
public override string CodePrefix
{
get { return "MOCK"; }
}
public override int GetWarningLevel(int code)
{
if (code >= 1000)
{
return code % 4 + 1;
}
else
{
return 0;
}
}
public override string GetErrorDisplayString(ISymbol symbol)
{
return MessageProvider.Instance.GetErrorDisplayString(symbol);
}
public override bool GetIsEnabledByDefault(int code)
{
return true;
}
#if DEBUG
internal override bool ShouldAssertExpectedMessageArgumentsLength(int errorCode) => false;
#endif
}
#endregion
#region CoreCLR Signing Tests
[ConditionalFact(typeof(UnixLikeOnly), typeof(ClrOnly)), WorkItem(9288, "https://github.com/dotnet/roslyn/issues/9288")]
public void Bug9288_keycontainer()
{
const string source = "";
var ca = CreateCompilation(source, options: TestOptions.ReleaseDll.WithStrongNameProvider(new DesktopStrongNameProvider()).WithCryptoKeyContainer("bogus"));
ca.VerifyEmitDiagnostics(EmitOptions.Default.WithDebugInformationFormat(DebugInformationFormat.PortablePdb),
// error CS7028: Error signing output with public key from container 'bogus' -- Assembly signing not supported.
Diagnostic(ErrorCode.ERR_PublicKeyContainerFailure).WithArguments("bogus", "Assembly signing not supported.").WithLocation(1, 1)
);
}
// There are three places where we catch a ClrStrongNameMissingException,
// but the third cannot happen - only if a key is successfully retrieved
// from a keycontainer, and then we fail to get IClrStrongName afterwards
// for the actual signing. However, we error on the key read, and can never
// get to the third case (but there's still error handling if that changes)
#endregion
#region PathMap Linux Tests
// Like the above (CoreCLR Signing Tests), these aren't actually syntax tests, but this is in one of only two assemblies tested on linux
[Theory]
[InlineData("C:\\", "/", "C:\\", "/")]
[InlineData("C:\\temp\\", "/temp/", "C:\\temp", "/temp")]
[InlineData("C:\\temp\\", "/temp/", "C:\\temp\\", "/temp/")]
[InlineData("/", "C:\\", "/", "C:\\")]
[InlineData("/temp/", "C:\\temp\\", "/temp", "C:\\temp")]
[InlineData("/temp/", "C:\\temp\\", "/temp/", "C:\\temp\\")]
public void PathMapKeepsCrossPlatformRoot(string expectedFrom, string expectedTo, string sourceFrom, string sourceTo)
{
var pathmapArg = $"/pathmap:{sourceFrom}={sourceTo}";
var parsedArgs = CSharpCommandLineParser.Default.Parse(new[] { pathmapArg, "a.cs" }, TempRoot.Root, RuntimeEnvironment.GetRuntimeDirectory(), null);
parsedArgs.Errors.Verify();
var expected = new KeyValuePair<string, string>(expectedFrom, expectedTo);
Assert.Equal(expected, parsedArgs.PathMap[0]);
}
[Fact]
public void PathMapInconsistentSlashes()
{
CSharpCommandLineArguments parse(params string[] args)
{
var parsedArgs = CSharpCommandLineParser.Default.Parse(args, TempRoot.Root, RuntimeEnvironment.GetRuntimeDirectory(), null);
parsedArgs.Errors.Verify();
return parsedArgs;
}
var sep = PathUtilities.DirectorySeparatorChar;
Assert.Equal(new KeyValuePair<string, string>("C:\\temp/goo" + sep, "/temp\\goo" + sep), parse("/pathmap:C:\\temp/goo=/temp\\goo", "a.cs").PathMap[0]);
Assert.Equal(new KeyValuePair<string, string>("noslash" + sep, "withoutslash" + sep), parse("/pathmap:noslash=withoutslash", "a.cs").PathMap[0]);
var doublemap = parse("/pathmap:/temp=/goo,/temp/=/bar", "a.cs").PathMap;
Assert.Equal(new KeyValuePair<string, string>("/temp/", "/goo/"), doublemap[0]);
Assert.Equal(new KeyValuePair<string, string>("/temp/", "/bar/"), doublemap[1]);
}
#endregion
[Fact]
public void TestIsBuildOnlyDiagnostic()
{
foreach (ErrorCode errorCode in Enum.GetValues(typeof(ErrorCode)))
{
// ErrorFacts.IsBuildOnlyDiagnostic with throw if any new ErrorCode
// is added but not explicitly handled within it.
// Update ErrorFacts.IsBuildOnlyDiagnostic if the below call throws.
var isBuildOnly = ErrorFacts.IsBuildOnlyDiagnostic(errorCode);
switch (errorCode)
{
case ErrorCode.WRN_ALinkWarn:
case ErrorCode.WRN_UnreferencedField:
case ErrorCode.WRN_UnreferencedFieldAssg:
case ErrorCode.WRN_UnreferencedEvent:
case ErrorCode.WRN_UnassignedInternalField:
case ErrorCode.ERR_MissingPredefinedMember:
case ErrorCode.ERR_PredefinedTypeNotFound:
case ErrorCode.ERR_NoEntryPoint:
case ErrorCode.WRN_InvalidMainSig:
case ErrorCode.ERR_MultipleEntryPoints:
case ErrorCode.WRN_MainIgnored:
case ErrorCode.ERR_MainClassNotClass:
case ErrorCode.WRN_MainCantBeGeneric:
case ErrorCode.ERR_NoMainInClass:
case ErrorCode.ERR_MainClassNotFound:
case ErrorCode.WRN_SyncAndAsyncEntryPoints:
case ErrorCode.ERR_BadDelegateConstructor:
case ErrorCode.ERR_InsufficientStack:
case ErrorCode.ERR_ModuleEmitFailure:
case ErrorCode.ERR_TooManyLocals:
case ErrorCode.ERR_BindToBogus:
case ErrorCode.ERR_ExportedTypeConflictsWithDeclaration:
case ErrorCode.ERR_ForwardedTypeConflictsWithDeclaration:
case ErrorCode.ERR_ExportedTypesConflict:
case ErrorCode.ERR_ForwardedTypeConflictsWithExportedType:
case ErrorCode.ERR_ByRefTypeAndAwait:
case ErrorCode.ERR_RefReturningCallAndAwait:
case ErrorCode.ERR_SpecialByRefInLambda:
case ErrorCode.ERR_DynamicRequiredTypesMissing:
case ErrorCode.ERR_CannotBeConvertedToUtf8:
case ErrorCode.ERR_FileTypeNonUniquePath:
case ErrorCode.ERR_InterceptorSignatureMismatch:
case ErrorCode.ERR_InterceptorMustHaveMatchingThisParameter:
case ErrorCode.ERR_InterceptorMustNotHaveThisParameter:
case ErrorCode.ERR_DuplicateInterceptor:
case ErrorCode.WRN_InterceptorSignatureMismatch:
case ErrorCode.ERR_InterceptorNotAccessible:
case ErrorCode.ERR_InterceptorScopedMismatch:
case ErrorCode.WRN_NullabilityMismatchInReturnTypeOnInterceptor:
case ErrorCode.WRN_NullabilityMismatchInParameterTypeOnInterceptor:
case ErrorCode.ERR_InterceptorCannotInterceptNameof:
case ErrorCode.ERR_SymbolDefinedInAssembly:
case ErrorCode.ERR_InterceptorArityNotCompatible:
case ErrorCode.ERR_InterceptorCannotBeGeneric:
case ErrorCode.ERR_InterceptableMethodMustBeOrdinary:
case ErrorCode.ERR_PossibleAsyncIteratorWithoutYield:
case ErrorCode.ERR_PossibleAsyncIteratorWithoutYieldOrAwait:
case ErrorCode.ERR_RefLocalAcrossAwait:
Assert.True(isBuildOnly, $"Check failed for ErrorCode.{errorCode}");
break;
default:
Assert.False(isBuildOnly, $"Check failed for ErrorCode.{errorCode}");
break;
}
}
}
}
}
|