private static LocalFunctionStatementSyntax CreateLocalFunctionStatement(
LocalDeclarationStatementSyntax localDeclaration,
AnonymousFunctionExpressionSyntax anonymousFunction,
IMethodSymbol delegateMethod,
ParameterListSyntax parameterList)
{
var modifiers = anonymousFunction.AsyncKeyword.IsKind(SyntaxKind.AsyncKeyword)
? new SyntaxTokenList(anonymousFunction.AsyncKeyword)
: default;
var returnType = delegateMethod.GenerateReturnTypeSyntax();
var identifier = localDeclaration.Declaration.Variables[0].Identifier;
var typeParameterList = default(TypeParameterListSyntax);
var constraintClauses = default(SyntaxList <TypeParameterConstraintClauseSyntax>);
var body = anonymousFunction.Body.IsKind(SyntaxKind.Block)
? (BlockSyntax)anonymousFunction.Body
: null;
var expressionBody = anonymousFunction.Body is ExpressionSyntax expression
? SyntaxFactory.ArrowExpressionClause(((LambdaExpressionSyntax)anonymousFunction).ArrowToken, expression)
: null;
var semicolonToken = anonymousFunction.Body is ExpressionSyntax
? localDeclaration.SemicolonToken
: default;
return(SyntaxFactory.LocalFunctionStatement(
modifiers, returnType, identifier, typeParameterList, parameterList,
constraintClauses, body, expressionBody, semicolonToken));
}
static void HandlePropertyCase(CodeRefactoringContext context, SyntaxNode root, SyntaxToken token, PropertyDeclarationSyntax property)
{
var getter = property.AccessorList.Accessors.FirstOrDefault(acc => acc.IsKind(SyntaxKind.GetAccessorDeclaration));
ExpressionSyntax expr;
if (getter == null || property.AccessorList.Accessors.Count != 1 || !IsSimpleReturn(getter.Body, out expr))
{
return;
}
context.RegisterRefactoring(
CodeActionFactory.Create(
token.Span,
DiagnosticSeverity.Info,
GettextCatalog.GetString("To expression body"),
t2 =>
{
var newRoot = root.ReplaceNode((SyntaxNode)
property,
property
.WithAccessorList(null)
.WithExpressionBody(SyntaxFactory.ArrowExpressionClause(expr))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken))
.WithTrailingTrivia(expr.Parent.GetTrailingTrivia())
.WithAdditionalAnnotations(Formatter.Annotation)
);
return(Task.FromResult(context.Document.WithSyntaxRoot(newRoot)));
}
)
);
}
private static MethodDeclarationSyntax CreateTypeRequestWithMessageAllowNull(
string className,
HttpStatusCode httpStatusCode,
string typeRequestName,
string parameterName = "message")
{
return(SyntaxFactory.MethodDeclaration(
SyntaxFactory.IdentifierName(className),
SyntaxFactory.Identifier(httpStatusCode.ToNormalizedString()))
.WithModifiers(SyntaxTokenListFactory.PublicStaticKeyword())
.WithParameterList(
SyntaxFactory.ParameterList(
SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.Parameter(SyntaxFactory.Identifier(parameterName))
.WithType(SyntaxFactory.NullableType(SyntaxFactory.PredefinedType(SyntaxTokenFactory.StringKeyword())))
.WithDefault(
SyntaxFactory.EqualsValueClause(
SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression))))))
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxObjectCreationExpressionFactory.Create(className)
.WithArgumentList(
SyntaxFactory.ArgumentList(
SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.Argument(
SyntaxObjectCreationExpressionFactory.Create(typeRequestName)
.WithArgumentList(
SyntaxArgumentListFactory.CreateWithOneItem(parameterName))))))))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)));
}
public void TestNull()
{
var syntaxNode = default(SyntaxNode);
var wrapper = (LocalFunctionStatementSyntaxWrapper)syntaxNode;
Assert.Null(wrapper.SyntaxNode);
Assert.Throws <NullReferenceException>(() => wrapper.Modifiers);
Assert.Throws <NullReferenceException>(() => wrapper.ReturnType);
Assert.Throws <NullReferenceException>(() => wrapper.Identifier);
Assert.Throws <NullReferenceException>(() => wrapper.TypeParameterList);
Assert.Throws <NullReferenceException>(() => wrapper.ParameterList);
Assert.Throws <NullReferenceException>(() => wrapper.ConstraintClauses);
Assert.Throws <NullReferenceException>(() => wrapper.Body);
Assert.Throws <NullReferenceException>(() => wrapper.ExpressionBody);
Assert.Throws <NullReferenceException>(() => wrapper.SemicolonToken);
Assert.Throws <NullReferenceException>(() => wrapper.WithModifiers(SyntaxFactory.TokenList()));
Assert.Throws <NullReferenceException>(() => wrapper.WithReturnType(SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.IntKeyword))));
Assert.Throws <NullReferenceException>(() => wrapper.WithIdentifier(SyntaxFactory.Identifier("Identifier")));
Assert.Throws <NullReferenceException>(() => wrapper.WithTypeParameterList(SyntaxFactory.TypeParameterList()));
Assert.Throws <NullReferenceException>(() => wrapper.WithParameterList(SyntaxFactory.ParameterList()));
Assert.Throws <NullReferenceException>(() => wrapper.WithConstraintClauses(SyntaxFactory.List <TypeParameterConstraintClauseSyntax>()));
Assert.Throws <NullReferenceException>(() => wrapper.WithBody(SyntaxFactory.Block()));
Assert.Throws <NullReferenceException>(() => wrapper.WithExpressionBody(SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(0)))));
Assert.Throws <NullReferenceException>(() => wrapper.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)));
Assert.Throws <NullReferenceException>(() => wrapper.AddModifiers());
Assert.Throws <NullReferenceException>(() => wrapper.AddTypeParameterListParameters());
Assert.Throws <NullReferenceException>(() => wrapper.AddParameterListParameters());
Assert.Throws <NullReferenceException>(() => wrapper.AddConstraintClauses());
Assert.Throws <NullReferenceException>(() => wrapper.AddBodyStatements());
}
public static bool TryConvertToArrowExpressionBody(
this BlockSyntax block, SyntaxKind declarationKind,
ParseOptions options, ExpressionBodyPreference preference,
out ArrowExpressionClauseSyntax arrowExpression,
out SyntaxToken semicolonToken)
{
var version = ((CSharpParseOptions)options).LanguageVersion;
// We can always use arrow-expression bodies in C# 7 or above.
// We can also use them in C# 6, but only a select set of member kinds.
var acceptableVersion =
version >= LanguageVersion.CSharp7 ||
(version >= LanguageVersion.CSharp6 && IsSupportedInCSharp6(declarationKind));
if (!acceptableVersion ||
!block.TryConvertToExpressionBody(
declarationKind, options, preference,
out var expression, out semicolonToken))
{
arrowExpression = null;
semicolonToken = default;
return(false);
}
arrowExpression = SyntaxFactory.ArrowExpressionClause(expression);
return(true);
}
/// <summary>
/// Creates the public properties for each Mvvm library.
/// </summary>
/// <returns>The public properties.</returns>
/// <param name="property">The property to generate.</param>
public virtual PropertyDeclarationSyntax CreatePublicProperties(Property property)
{
return(SyntaxFactory.PropertyDeclaration(SyntaxFactory.ParseTypeName(property.Type.FindType()), property.Name)
.AddModifiers(SyntaxFactory.Token(SyntaxKind.PublicKeyword))
.AddAccessorListAccessors(
SyntaxFactory.AccessorDeclaration(
SyntaxKind.GetAccessorDeclaration)
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression, SyntaxFactory.ThisExpression(), SyntaxFactory.IdentifierName(property.Name.ToCamelCase()))))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)),
SyntaxFactory.AccessorDeclaration(
SyntaxKind.SetAccessorDeclaration)
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.InvocationExpression(
SyntaxFactory.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression, SyntaxFactory.ThisExpression(), SyntaxFactory.IdentifierName("Set")))
.WithArgumentList(SyntaxFactory.ArgumentList(SyntaxFactory.SeparatedList <ArgumentSyntax>(
new SyntaxNodeOrToken[]
{
SyntaxFactory.Argument(SyntaxFactory.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression, SyntaxFactory.ThisExpression(), SyntaxFactory.IdentifierName(property.Name.ToCamelCase())))
.WithRefKindKeyword(SyntaxFactory.Token(SyntaxKind.RefKeyword)), SyntaxFactory.Token(SyntaxKind.CommaToken), SyntaxFactory.Argument(SyntaxFactory.IdentifierName("value"))
})))))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)))
.WithModifiers(FormatterHelper.GenerateComment(property.Comment)));
}
private PropertyDeclarationSyntax CreateCommandProperty(Command command)
{
var name = command.FormatCommandName();
var type = this.GetCommandType(command);
return(SyntaxFactory.PropertyDeclaration(SyntaxFactory.ParseTypeName(typeof(System.Windows.Input.ICommand).ToString()), name)
.AddModifiers(SyntaxFactory.Token(SyntaxKind.PublicKeyword))
.AddAccessorListAccessors(
SyntaxFactory.AccessorDeclaration(SyntaxKind.GetAccessorDeclaration)
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.BinaryExpression(
SyntaxKind.CoalesceExpression,
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.ThisExpression(),
SyntaxFactory.IdentifierName(name.ToCamelCase())),
SyntaxFactory.ParenthesizedExpression(
SyntaxFactory.AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.ThisExpression(),
SyntaxFactory.IdentifierName(name.ToCamelCase())),
SyntaxFactory.ObjectCreationExpression(SyntaxFactory.IdentifierName(type))
.WithArgumentList(this.GetCommandMethodSyntax(command)))))))
.WithSemicolonToken(SyntaxFactory.Token(
SyntaxFactory.TriviaList(),
SyntaxKind.SemicolonToken,
SyntaxFactory.TriviaList(SyntaxFactory.Comment(this.GenerateCommandComment(command))))))
.WithModifiers(FormatterHelper.GenerateComment(command.Comment)));
}
private LocalFunctionStatementSyntax CreateLocalFunctionStatement(
LocalDeclarationStatementSyntax localDeclaration,
LambdaExpressionSyntax lambda,
INamedTypeSymbol delegateType,
ParameterListSyntax parameterList,
CancellationToken cancellationToken)
{
var modifiers = lambda.AsyncKeyword.IsKind(SyntaxKind.AsyncKeyword)
? new SyntaxTokenList(lambda.AsyncKeyword)
: default;
var invokeMethod = delegateType.DelegateInvokeMethod;
var returnType = invokeMethod.GenerateReturnTypeSyntax();
var identifier = localDeclaration.Declaration.Variables[0].Identifier;
var typeParameterList = default(TypeParameterListSyntax);
var constraintClauses = default(SyntaxList <TypeParameterConstraintClauseSyntax>);
var body = lambda.Body.IsKind(SyntaxKind.Block)
? (BlockSyntax)lambda.Body
: null;
var expressionBody = lambda.Body is ExpressionSyntax expression
? SyntaxFactory.ArrowExpressionClause(lambda.ArrowToken, expression)
: null;
var semicolonToken = lambda.Body is ExpressionSyntax
? localDeclaration.SemicolonToken
: default;
return(SyntaxFactory.LocalFunctionStatement(
modifiers, returnType, identifier, typeParameterList, parameterList,
constraintClauses, body, expressionBody, semicolonToken));
}
public static bool TryConvertToExpressionBody(
this BlockSyntax block, ParseOptions options,
ExpressionBodyPreference preference,
out ArrowExpressionClauseSyntax arrowExpression,
out SyntaxToken semicolonToken)
{
if (preference != ExpressionBodyPreference.Never &&
(options as CSharpParseOptions)?.LanguageVersion >= LanguageVersion.CSharp7)
{
if (block != null && block.Statements.Count == 1)
{
var firstStatement = block.Statements[0];
if (TryGetExpression(firstStatement, out var expression, out semicolonToken) &&
MatchesPreference(expression, preference))
{
arrowExpression = SyntaxFactory.ArrowExpressionClause(expression);
// The close brace of the block may have important trivia on it (like
// comments or directives). Preserve them on the semicolon when we
// convert to an expression body.
semicolonToken = semicolonToken.WithAppendedTrailingTrivia(
block.CloseBraceToken.LeadingTrivia.Where(t => !t.IsWhitespaceOrEndOfLine()));
return(true);
}
}
}
arrowExpression = null;
semicolonToken = default(SyntaxToken);
return(false);
}
private MemberDeclarationSyntax CreatePropertyForStatusCodeContent(
HttpStatusCode statusCode,
string resultTypeName)
=> SyntaxFactory.PropertyDeclaration(
SyntaxFactory.IdentifierName(resultTypeName),
SyntaxFactory.Identifier(statusCode.ToNormalizedString() + "Content"))
.WithModifiers(SyntaxTokenListFactory.PublicKeyword())
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.ConditionalExpression(
SyntaxFactory.BinaryExpression(
SyntaxKind.LogicalAndExpression,
SyntaxFactory.IdentifierName("Is" + statusCode.ToNormalizedString()),
SyntaxFactory.IsPatternExpression(
SyntaxFactory.IdentifierName("ContentObject"),
SyntaxFactory.DeclarationPattern(
SyntaxFactory.IdentifierName(resultTypeName),
SyntaxFactory.SingleVariableDesignation(
SyntaxFactory.Identifier("result"))))),
SyntaxFactory.IdentifierName("result"),
SyntaxFactory.ThrowExpression(
SyntaxFactory.ObjectCreationExpression(SyntaxFactory.IdentifierName(nameof(InvalidOperationException)))
.WithArgumentList(
SyntaxFactory.ArgumentList(
SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.Argument(
SyntaxFactory.LiteralExpression(
SyntaxKind.StringLiteralExpression,
SyntaxFactory.Literal($"Content is not the expected type - please use the Is{statusCode.ToNormalizedString()} property first."))))))))))
.WithSemicolonToken(SyntaxTokenFactory.Semicolon());
/// <summary>
/// Creates the public properties for each Mvvm library.
/// </summary>
/// <returns>The public properties.</returns>
/// <param name="property">The property to generate.</param>
public override PropertyDeclarationSyntax CreatePublicProperties(Property property)
{
return(SyntaxFactory.PropertyDeclaration(SyntaxFactory.ParseTypeName(property.Type.FindType()), property.Name)
.AddModifiers(SyntaxFactory.Token(SyntaxKind.PublicKeyword))
.AddAccessorListAccessors(
SyntaxFactory.AccessorDeclaration(
SyntaxKind.GetAccessorDeclaration)
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression, SyntaxFactory.ThisExpression(), SyntaxFactory.IdentifierName(property.Name.ToCamelCase()))))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)),
SyntaxFactory.AccessorDeclaration(
SyntaxKind.SetAccessorDeclaration)
.WithBody(
SyntaxFactory.Block(
SyntaxFactory.ExpressionStatement(
SyntaxFactory.AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
SyntaxFactory.IdentifierName(property.Name.ToCamelCase()),
SyntaxFactory.IdentifierName("value"))),
SyntaxFactory.ExpressionStatement(
SyntaxFactory.InvocationExpression(
SyntaxFactory.IdentifierName("RaisePropertyChanged"))))))
.WithModifiers(FormatterHelper.GenerateComment(property.Comment)));
}
public override SyntaxNode VisitMethodDeclaration(MethodDeclarationSyntax node)
{
if (!HasClosedSourceAttribute(node, node.AttributeLists))
{
return(node);
}
if (node.Modifiers.Any(m => m.Text == "abstract"))
{
return(node);
}
var returntype = node.ReturnType.ToString();
ExpressionSyntax expression = null;
if (returntype != "void")
{
expression = SyntaxFactory.DefaultExpression(node.ReturnType.WithoutTrivia());
}
else
{
expression = SyntaxFactory.InvocationExpression(SyntaxFactory.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression, SyntaxFactory.IdentifierName(@"System.Linq.Expressions.Expression"),
SyntaxFactory.IdentifierName(@"Empty")).WithOperatorToken(SyntaxFactory.Token(SyntaxKind.DotToken)));
}
ArrowExpressionClauseSyntax arrowExpressionClause = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.Token(SyntaxKind.EqualsGreaterThanToken).WithTrailingTrivia(SyntaxFactory.Space).WithLeadingTrivia(SyntaxFactory.Space), expression);
return(SyntaxFactory.MethodDeclaration(node.AttributeLists, node.Modifiers,
node.ReturnType, node.ExplicitInterfaceSpecifier, node.Identifier,
node.TypeParameterList, node.ParameterList.WithoutTrivia(), node.ConstraintClauses, null, arrowExpressionClause, SyntaxFactory.Token(SyntaxKind.SemicolonToken)).WithTrailingTrivia(SyntaxFactory.EndOfLine("\r\n")));
}
static void HandleMethodCase(CodeRefactoringContext context, SyntaxNode root, SyntaxToken token, MethodDeclarationSyntax method)
{
ExpressionSyntax expr;
if (!IsSimpleReturn(method.Body, out expr))
{
if (!IsSimpleExpressionInVoidMethod(method, out expr))
{
return;
}
}
context.RegisterRefactoring(
CodeActionFactory.Create(
token.Span,
DiagnosticSeverity.Info,
GettextCatalog.GetString("To expression body"),
t2 =>
{
var newRoot = root.ReplaceNode((SyntaxNode)
method,
method
.WithBody(null)
.WithExpressionBody(SyntaxFactory.ArrowExpressionClause(expr))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken))
.WithTrailingTrivia(expr.Parent.GetTrailingTrivia())
.WithAdditionalAnnotations(Formatter.Annotation)
);
return(Task.FromResult(context.Document.WithSyntaxRoot(newRoot)));
}
)
);
}
internal static ArrowExpressionClauseSyntax MethodPointer(
string identifier,
ParameterListSyntax parameters
) =>
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.InvocationExpression(
SyntaxFactory.IdentifierName(identifier),
FromParams(parameters)));
private PropertyDeclarationSyntax CreateReadOnlyPropertyWithDefultValue(PropertyTemplateData propertyTemplate)
{
return(SyntaxFactory.PropertyDeclaration(SyntaxFactory.ParseTypeName(propertyTemplate.Type), propertyTemplate.Name)
.AddModifiers(SyntaxFactory.Token(SyntaxKind.PublicKeyword))
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(propertyTemplate.DefaultValue))))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)));
}
public void TestWithExpressionBody()
{
var syntax = SyntaxFactory.ConstructorDeclaration(SyntaxFactory.Identifier("Anything"));
var expressionBody = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
var syntaxWithBody = ConstructorDeclarationSyntaxExtensions.WithExpressionBody(syntax, expressionBody);
Assert.Null(syntax.ExpressionBody);
Assert.NotNull(syntaxWithBody.ExpressionBody);
Assert.Equal(SyntaxKind.NullLiteralExpression, syntaxWithBody.ExpressionBody.Expression.Kind());
}
public void TestWithExpressionBody()
{
var accessorDeclarationSyntax = SyntaxFactory.AccessorDeclaration(SyntaxKind.GetAccessorDeclaration);
var expressionBody = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
var accessorWithBody = AccessorDeclarationSyntaxExtensions.WithExpressionBody(accessorDeclarationSyntax, expressionBody);
Assert.Null(accessorDeclarationSyntax.ExpressionBody);
Assert.NotNull(accessorWithBody.ExpressionBody);
Assert.Equal(SyntaxKind.NullLiteralExpression, accessorWithBody.ExpressionBody.Expression.Kind());
}
TCommand WithSetBody(CodeContext code)
{
var body = code.GetCode();
SetStatements = body as BlockSyntax;
if (body is ExpressionSyntax bodyexpr)
{
SetExpression = SyntaxFactory.ArrowExpressionClause(bodyexpr);
}
return((TCommand)this);
}
public async Task FormatElasticTriviaBetweenPropertiesWithoutAccessors()
{
var expected = @"class PropertyTest
{
string MyProperty => ""42"";
string MyProperty => ""42"";
}";
var property = SyntaxFactory.PropertyDeclaration(
attributeLists: default(SyntaxList <AttributeListSyntax>),
modifiers: SyntaxFactory.TokenList(),
refKeyword: default(SyntaxToken),
type: SyntaxFactory.PredefinedType(
SyntaxFactory.Token(
SyntaxKind.StringKeyword)),
explicitInterfaceSpecifier: null,
identifier: SyntaxFactory.Identifier("MyProperty"),
accessorList: null,
expressionBody:
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.LiteralExpression(
SyntaxKind.StringLiteralExpression,
SyntaxFactory.Literal("42"))),
initializer: null,
semicolonToken: SyntaxFactory.Token(SyntaxKind.SemicolonToken));
var compilation = SyntaxFactory.CompilationUnit(
externs: default(SyntaxList <ExternAliasDirectiveSyntax>),
usings: default(SyntaxList <UsingDirectiveSyntax>),
attributeLists: default(SyntaxList <AttributeListSyntax>),
members: SyntaxFactory.List(
new MemberDeclarationSyntax[]
{
SyntaxFactory.ClassDeclaration(
attributeLists: default(SyntaxList <AttributeListSyntax>),
modifiers: SyntaxFactory.TokenList(),
identifier: SyntaxFactory.Identifier("PropertyTest"),
typeParameterList: null,
baseList: null,
constraintClauses: default(SyntaxList <TypeParameterConstraintClauseSyntax>),
members: SyntaxFactory.List(
new MemberDeclarationSyntax[]
{
property,
property
}))
}));
Assert.NotNull(compilation);
var newCompilation = await Formatter.FormatAsync(compilation, new AdhocWorkspace());
Assert.Equal(expected, newCompilation.ToFullString());
}
private LocalFunctionStatementSyntax CreateLocalFunctionStatement()
{
return(SyntaxFactory.LocalFunctionStatement(
modifiers: SyntaxFactory.TokenList(SyntaxFactory.TokenList(SyntaxFactory.Token(SyntaxKind.PrivateKeyword))),
returnType: SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.IntKeyword)),
identifier: SyntaxFactory.Identifier("Identifier"),
typeParameterList: SyntaxFactory.TypeParameterList(SyntaxFactory.SeparatedList(ImmutableArray.Create(SyntaxFactory.TypeParameter("T1")))),
parameterList: SyntaxFactory.ParameterList(SyntaxFactory.SeparatedList(ImmutableArray.Create(SyntaxFactory.Parameter(SyntaxFactory.Identifier("param1"))))),
constraintClauses: SyntaxFactory.List <TypeParameterConstraintClauseSyntax>(ImmutableArray.Create(SyntaxFactory.TypeParameterConstraintClause(SyntaxFactory.IdentifierName("constraint1")))),
body: SyntaxFactory.Block(SyntaxFactory.BreakStatement()),
expressionBody: SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NumericLiteralExpression, SyntaxFactory.Literal(0)))));
}
public async Task <CSharpSyntaxNode> Convert(VBSyntax.LambdaExpressionSyntax vbNode,
ParameterListSyntax param, IReadOnlyCollection <StatementSyntax> convertedStatements)
{
BlockSyntax block = null;
ExpressionSyntax expressionBody = null;
ArrowExpressionClauseSyntax arrow = null;
if (convertedStatements.TryUnpackSingleStatement(out StatementSyntax singleStatement) &&
singleStatement.TryUnpackSingleExpressionFromStatement(out expressionBody))
{
arrow = SyntaxFactory.ArrowExpressionClause(expressionBody);
}
private static AccessorDeclarationSyntax CreateGetter(string backingFieldName)
{
return(SyntaxFactory.AccessorDeclaration(SyntaxKind.GetAccessorDeclaration)
.WithKeyword(CreateTokenWithTrailingSpace(SyntaxKind.GetKeyword))
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.ThisExpression(),
SyntaxFactory.IdentifierName(backingFieldName)))
.WithArrowToken(CreateTokenWithTrailingSpace(SyntaxKind.EqualsGreaterThanToken)))
.WithSemicolonToken(CreateTokenWithTrailingSpace(SyntaxKind.SemicolonToken)));
}
private MemberDeclarationSyntax CreatePropertyForIsStatusCode(
HttpStatusCode statusCode)
=> SyntaxFactory.PropertyDeclaration(
SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.BoolKeyword)),
SyntaxFactory.Identifier("Is" + statusCode.ToNormalizedString()))
.WithModifiers(SyntaxFactory.TokenList(SyntaxFactory.Token(SyntaxKind.PublicKeyword)))
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.BinaryExpression(
SyntaxKind.EqualsExpression,
SyntaxFactory.IdentifierName("StatusCode"),
SyntaxMemberAccessExpressionFactory.Create(statusCode.ToString(), nameof(HttpStatusCode)))))
.WithSemicolonToken(SyntaxTokenFactory.Semicolon());
public MethodDeclarationSyntax Replace(MethodDeclarationSyntax method)
{
var originalBody = MethodBody(method);
var proxyBody = ProxyBody(method, originalBody);
var newBody = SyntaxFactory.ParseExpression(proxyBody);
var expressionBody = SyntaxFactory.ArrowExpressionClause(newBody);
return(method
.WithBody(null)
.WithoutTrailingTrivia()
.WithExpressionBody(expressionBody));
}
private static MemberDeclarationSyntax[] GenerateMethods(IReadOnlyList <TableModel> tables, string tablePrefix)
{
var result = new List <MemberDeclarationSyntax>(tables.Count * 2 + 2);
var identifierAliasType = SyntaxFactory.IdentifierName(nameof(Alias));
var arrayItems = tables.Select(t => SyntaxFactory.IdentifierName(GetMethodName(t, tablePrefix)).Invoke(identifierAliasType.MemberAccess(nameof(Alias.Empty))));
var arrayType = SyntaxFactory.ArrayType(SyntaxFactory.IdentifierName(nameof(TableBase)),
new SyntaxList <ArrayRankSpecifierSyntax>(new[]
{
SyntaxFactory.ArrayRankSpecifier(SyntaxFactory.Token(SyntaxKind.OpenBracketToken),
new SeparatedSyntaxList <ExpressionSyntax>(),
SyntaxFactory.Token(SyntaxKind.CloseBracketToken))
}));
var array = SyntaxFactory.ArrayCreationExpression(
arrayType,
SyntaxFactory.InitializerExpression(SyntaxKind.ArrayInitializerExpression,
new SeparatedSyntaxList <ExpressionSyntax>().AddRange(arrayItems))
);
result.Add(
SyntaxFactory.MethodDeclaration(arrayType, "BuildAllTableList")
.WithModifiers(SyntaxHelpers.Modifiers(SyntaxKind.PublicKeyword, SyntaxKind.StaticKeyword))
.WithExpressionBody(SyntaxFactory.ArrowExpressionClause(
array
))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)));
foreach (var t in tables)
{
var aliasParamName = "alias";
result.Add(SyntaxFactory.MethodDeclaration(SyntaxFactory.ParseTypeName(t.Name), GetMethodName(t, tablePrefix))
.WithModifiers(SyntaxHelpers.Modifiers(SyntaxKind.PublicKeyword, SyntaxKind.StaticKeyword))
.AddParameterListParameters(SyntaxHelpers.FuncParameter(aliasParamName, nameof(Alias)))
.WithExpressionBody(SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.ObjectCreationExpression(SyntaxFactory.ParseTypeName(t.Name),
SyntaxHelpers.ArgumentList(SyntaxFactory.IdentifierName(aliasParamName)),
null)))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)));
result.Add(SyntaxFactory.MethodDeclaration(SyntaxFactory.ParseTypeName(t.Name), GetMethodName(t, tablePrefix))
.WithModifiers(SyntaxHelpers.Modifiers(SyntaxKind.PublicKeyword, SyntaxKind.StaticKeyword))
.WithExpressionBody(SyntaxFactory.ArrowExpressionClause(
SyntaxFactory.ObjectCreationExpression(SyntaxFactory.ParseTypeName(t.Name),
SyntaxHelpers.ArgumentList(identifierAliasType.MemberAccess(nameof(Alias.Auto))),
null)))
.WithSemicolonToken(SyntaxFactory.Token(SyntaxKind.SemicolonToken)));
}
return(result.ToArray());
public void TestWithExpressionBody()
{
var accessorDeclarationSyntax = SyntaxFactory.AccessorDeclaration(SyntaxKind.GetAccessorDeclaration);
// With default value is allowed
var accessorWithDefaultBody = AccessorDeclarationSyntaxExtensions.WithExpressionBody(accessorDeclarationSyntax, null);
Assert.Null(AccessorDeclarationSyntaxExtensions.ExpressionBody(accessorWithDefaultBody));
// Non-default throws an exception
var expressionBody = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
Assert.Throws <NotSupportedException>(() => AccessorDeclarationSyntaxExtensions.WithExpressionBody(accessorDeclarationSyntax, expressionBody));
}
public void TestExpressionBody_Method()
{
var syntax = SyntaxFactory.MethodDeclaration(
SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.IntKeyword)),
SyntaxFactory.Identifier("Anything"));
Assert.Null(BaseMethodDeclarationSyntaxExtensions.ExpressionBody(syntax));
var expressionBody = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
syntax = syntax.WithExpressionBody(expressionBody);
Assert.NotNull(BaseMethodDeclarationSyntaxExtensions.ExpressionBody(syntax));
Assert.Equal(SyntaxKind.NullLiteralExpression, BaseMethodDeclarationSyntaxExtensions.ExpressionBody(syntax).Expression.Kind());
}
public void TestExpressionBody_ConversionOperator()
{
var syntax = SyntaxFactory.ConversionOperatorDeclaration(
SyntaxFactory.Token(SyntaxKind.ExplicitKeyword),
SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.IntKeyword)));
Assert.Null(BaseMethodDeclarationSyntaxExtensions.ExpressionBody(syntax));
var expressionBody = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
syntax = syntax.WithExpressionBody(expressionBody);
Assert.NotNull(BaseMethodDeclarationSyntaxExtensions.ExpressionBody(syntax));
Assert.Equal(SyntaxKind.NullLiteralExpression, BaseMethodDeclarationSyntaxExtensions.ExpressionBody(syntax).Expression.Kind());
}
public void TestWithExpressionBody()
{
var syntax = SyntaxFactory.DestructorDeclaration(SyntaxFactory.Identifier("Anything"));
// With default value is allowed
var syntaxWithDefaultBody = DestructorDeclarationSyntaxExtensions.WithExpressionBody(syntax, null);
Assert.Null(BaseMethodDeclarationSyntaxExtensions.ExpressionBody(syntaxWithDefaultBody));
// Non-default throws an exception
var expressionBody = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
Assert.Throws <NotSupportedException>(() => DestructorDeclarationSyntaxExtensions.WithExpressionBody(syntax, expressionBody));
}
private static MethodDeclarationSyntax CreateTypeRequestWithObject(
string className,
HttpStatusCode httpStatusCode,
string typeRequestName,
string parameterName = "message")
{
return(SyntaxFactory.MethodDeclaration(
SyntaxFactory.IdentifierName(className),
SyntaxFactory.Identifier(httpStatusCode.ToNormalizedString()))
.WithModifiers(SyntaxTokenListFactory.PublicStaticKeyword())
.WithParameterList(
SyntaxFactory.ParameterList(
SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.Parameter(SyntaxFactory.Identifier(parameterName))
.WithType(SyntaxFactory.NullableType(SyntaxFactory.PredefinedType(SyntaxTokenFactory.StringKeyword())))
.WithDefault(
SyntaxFactory.EqualsValueClause(
SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression))))))
.WithExpressionBody(
SyntaxFactory.ArrowExpressionClause(
SyntaxObjectCreationExpressionFactory.Create(className)
.WithArgumentList(
SyntaxFactory.ArgumentList(
SyntaxFactory.SingletonSeparatedList(
SyntaxFactory.Argument(
SyntaxObjectCreationExpressionFactory.Create(typeRequestName)
.WithInitializer(
SyntaxFactory.InitializerExpression(
SyntaxKind.ObjectInitializerExpression,
SyntaxFactory.SeparatedList <ExpressionSyntax>(
new SyntaxNodeOrToken[]
{
SyntaxFactory.AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
SyntaxFactory.IdentifierName("StatusCode"),
SyntaxFactory.CastExpression(
SyntaxFactory.PredefinedType(
SyntaxFactory.Token(SyntaxKind.IntKeyword)),
SyntaxFactory.MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
SyntaxFactory.IdentifierName(nameof(HttpStatusCode)),
SyntaxFactory.IdentifierName(httpStatusCode.ToNormalizedString())))),
SyntaxTokenFactory.Comma(),
SyntaxFactory.AssignmentExpression(
SyntaxKind.SimpleAssignmentExpression,
SyntaxFactory.IdentifierName("Content"),
SyntaxFactory.IdentifierName(parameterName)),
})))))))))
.WithSemicolonToken(SyntaxTokenFactory.Semicolon()));
}