internal static void ReportDefaultInterfaceImplementationModifiers(
bool hasBody,
DeclarationModifiers modifiers,
DeclarationModifiers defaultInterfaceImplementationModifiers,
Location errorLocation,
BindingDiagnosticBag diagnostics)
{
if (!hasBody && (modifiers & defaultInterfaceImplementationModifiers) != 0)
{
LanguageVersion availableVersion = ((CSharpParseOptions)errorLocation.SourceTree.Options).LanguageVersion;
LanguageVersion requiredVersion = MessageID.IDS_DefaultInterfaceImplementation.RequiredVersion();
if (availableVersion < requiredVersion)
{
DeclarationModifiers errorModifiers = modifiers & defaultInterfaceImplementationModifiers;
var requiredVersionArgument = new CSharpRequiredLanguageVersion(requiredVersion);
var availableVersionArgument = availableVersion.ToDisplayString();
while (errorModifiers != DeclarationModifiers.None)
{
DeclarationModifiers oneError = errorModifiers & ~(errorModifiers - 1);
Debug.Assert(oneError != DeclarationModifiers.None);
errorModifiers = errorModifiers & ~oneError;
diagnostics.Add(ErrorCode.ERR_InvalidModifierForLanguageVersion, errorLocation,
ConvertSingleModifierToSyntaxText(oneError),
availableVersionArgument,
requiredVersionArgument);
}
}
}
}
internal static void ReportUnsupportedModifiersForLanguageVersion(DeclarationModifiers modifiers, DeclarationModifiers unsupportedModifiers, Location errorLocation, BindingDiagnosticBag diagnostics, LanguageVersion availableVersion, LanguageVersion requiredVersion)
{
DeclarationModifiers errorModifiers = modifiers & unsupportedModifiers;
var requiredVersionArgument = new CSharpRequiredLanguageVersion(requiredVersion);
var availableVersionArgument = availableVersion.ToDisplayString();
while (errorModifiers != DeclarationModifiers.None)
{
DeclarationModifiers oneError = errorModifiers & ~(errorModifiers - 1);
Debug.Assert(oneError != DeclarationModifiers.None);
errorModifiers = errorModifiers & ~oneError;
diagnostics.Add(ErrorCode.ERR_InvalidModifierForLanguageVersion, errorLocation,
ConvertSingleModifierToSyntaxText(oneError),
availableVersionArgument,
requiredVersionArgument);
}
}
public void SetProperty_MaxSupportedLangVersion(LanguageVersion?maxSupportedLangVersion)
{
using var environment = new TestEnvironment(typeof(CSharpParseOptionsChangingService));
var hierarchy = environment.CreateHierarchy(
"CSharpProject",
"Bin",
projectRefPath: null,
projectCapabilities: "CSharp"
);
var storage = Assert.IsAssignableFrom <IVsBuildPropertyStorage>(hierarchy);
Assert.True(
ErrorHandler.Succeeded(
storage.SetPropertyValue(
"MaxSupportedLangVersion",
null,
(uint)_PersistStorageType.PST_PROJECT_FILE,
maxSupportedLangVersion?.ToDisplayString()
)
)
);
_ = CSharpHelpers.CreateCSharpProject(environment, "Test", hierarchy);
var project = environment.Workspace.CurrentSolution.Projects.Single();
var oldParseOptions = (CSharpParseOptions)project.ParseOptions;
const LanguageVersion attemptedVersion = LanguageVersion.CSharp8;
var canApply = environment.Workspace.CanApplyParseOptionChange(
oldParseOptions,
oldParseOptions.WithLanguageVersion(attemptedVersion),
project
);
if (maxSupportedLangVersion.HasValue)
{
Assert.Equal(attemptedVersion <= maxSupportedLangVersion.Value, canApply);
}
else
{
Assert.True(canApply);
}
}