ExpressionSyntax GenerateTarget(SemanticModel model, BinaryExpressionSyntax node)
{
var symbols = model.LookupSymbols(node.SpanStart).OfType<IMethodSymbol>();
if (!symbols.Any() || HasDifferentEqualsMethod(symbols))
return SyntaxFactory.MemberAccessExpression(SyntaxKind.SimpleMemberAccessExpression, SyntaxFactory.ParseExpression("object"), SyntaxFactory.IdentifierName("Equals"));
else
return SyntaxFactory.IdentifierName("Equals");
}
public static string ReduceQualifiedTypeName(
this ITypeSymbol type,SemanticModel semantic,int classDeclarationPosition)
{
// one problem is that the type could be from a different semantic model
// (one that was created before) so we search the type in the
// new model and if we find it use the new one instead
var typeInSemanticModel = semantic.LookupSymbols(0, name: type.Name)
.OfType<ITypeSymbol>()
.FirstOrDefault();
if (typeInSemanticModel != null)
type = typeInSemanticModel;
return type.ToMinimalDisplayString(semantic, classDeclarationPosition);
}
private static string GetProgramElementNameThatMatchStringLiteral(LiteralExpressionSyntax stringLiteral, SemanticModel semanticModel)
{
var programElementName = GetParameterNameThatMatchStringLiteral(stringLiteral);
if (!Found(programElementName))
{
var literalValueText = stringLiteral.Token.ValueText;
var symbol = semanticModel.LookupSymbols(stringLiteral.Token.SpanStart, null, literalValueText).FirstOrDefault();
programElementName = symbol?.ToDisplayParts().LastOrDefault(IncludeOnlyPartsThatAreName).ToString();
}
return programElementName;
}
protected virtual IEnumerable<CompletionData> CreateCompletionData (CompletionEngine engine, SemanticModel semanticModel, int position, INamedTypeSymbol enclosingType, SyntaxToken token, bool afterPartialKeyword, CancellationToken cancellationToken)
{
var symbols = semanticModel.LookupSymbols(position, container: enclosingType)
.OfType<IMethodSymbol>()
.Where(m => IsPartial(m) && m.PartialImplementationPart == null);
var list = new List<CompletionData> ();
var declarationBegin = afterPartialKeyword ? token.Parent.SpanStart : position - 1;
foreach (var m in symbols) {
var data = engine.Factory.CreatePartialCompletionData (
this,
declarationBegin,
enclosingType,
m,
afterPartialKeyword
);
list.Add (data);
}
return list;
}
private static string GetProgramElementNameThatMatchStringLiteral(LiteralExpressionSyntax stringLiteral, SemanticModel semanticModel)
{
var programElementName = GetParameterNameThatMatchStringLiteral(stringLiteral);
if (!Found(programElementName))
{
var literalValueText = stringLiteral.Token.ValueText;
var symbol = semanticModel.LookupSymbols(stringLiteral.Token.SpanStart, null, literalValueText).FirstOrDefault();
if (symbol?.Kind == SymbolKind.Local)
{
var symbolSpan = symbol.Locations.Min(i => i.SourceSpan);
if (symbolSpan.CompareTo(stringLiteral.Token.Span) > 0)
return string.Empty;
}
programElementName = symbol?.ToDisplayParts().LastOrDefault(AnalyzerExtensions.IsName).ToString();
}
return programElementName;
}
private static string DetectSynchronousUsages(IMethodSymbol methodCallSymbol, SemanticModel semanticModel)
{
var list = semanticModel.LookupSymbols(0, container: methodCallSymbol.ContainingType,
includeReducedExtensionMethods: true);
var name = methodCallSymbol.Name;
if (methodCallSymbol.ContainingType == null)
{
return "None";
}
if (methodCallSymbol.ContainingType.Name == "Thread" && name == "Sleep")
{
return "Task.Delay";
}
// Parameter Sifir olmasi lazim!!!!!
else if (methodCallSymbol.ContainingType.Name == "Task" && name == "Wait")
{
return "await";
}
else if (methodCallSymbol.ContainingType.Name == "Task" && name == "WaitAll")
{
return "Task.WhenAll";
}
else if (methodCallSymbol.ContainingType.Name == "Task" && name == "WaitAny")
{
return "Task.WhenAny";
}
foreach (var tmp in list)
{
if (tmp.Name.Equals(name + "Async"))
{
return tmp.Name;
}
}
return "None";
}
static bool FindIssuesInAccessor(SemanticModel semanticModel, AccessorDeclarationSyntax accessor)
{
var body = accessor.Body;
if (!IsEligible(body))
return false;
if (body.Statements.Any())
{
var foundValueSymbol = semanticModel.LookupSymbols(body.Statements.First().SpanStart, null, "value").FirstOrDefault();
if (foundValueSymbol == null)
return false;
foreach (var valueRef in body.DescendantNodes().OfType<IdentifierNameSyntax>().Where(ins => ins.Identifier.ValueText == "value"))
{
var valueRefSymbol = semanticModel.GetSymbolInfo(valueRef).Symbol;
if (foundValueSymbol.Equals(valueRefSymbol))
return false;
}
}
return true;
}
private static string GetProgramElementNameThatMatchStringLiteral(LiteralExpressionSyntax stringLiteral, SemanticModel semanticModel, out bool externalSymbol)
{
externalSymbol = false;
var programElementName = GetParameterNameThatMatchStringLiteral(stringLiteral);
if (!Found(programElementName))
{
var literalValueText = stringLiteral.Token.ValueText;
var symbol = semanticModel.LookupSymbols(stringLiteral.Token.SpanStart, null, literalValueText).FirstOrDefault();
if (symbol == null) return null;
externalSymbol = !symbol.Locations.Any(l => l.IsInSource);
if (symbol.Kind == SymbolKind.Local)
{
var symbolSpan = symbol.Locations.Min(i => i.SourceSpan);
if (symbolSpan.CompareTo(stringLiteral.Token.Span) > 0)
return null;
}
programElementName = symbol.ToDisplayParts(NameOfSymbolDisplayFormat).LastOrDefault(AnalyzerExtensions.IsName).ToString();
}
return programElementName;
}
private bool TryGetIndexers(int position, SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken, out IEnumerable<IPropertySymbol> indexers, out ITypeSymbol expressionType)
{
expressionType = semanticModel.GetTypeInfo(expression, cancellationToken).Type;
if (expressionType == null)
{
indexers = null;
return false;
}
if (expressionType is IErrorTypeSymbol)
{
expressionType = (expressionType as IErrorTypeSymbol).CandidateSymbols.FirstOrDefault().GetSymbolType();
}
indexers = semanticModel.LookupSymbols(position, expressionType, WellKnownMemberNames.Indexer).OfType<IPropertySymbol>();
return true;
}
private Task<IEnumerable<CompletionData>> GetCompletionsOffOfExplicitInterfaceAsync(
CompletionEngine engine, Document document, SemanticModel semanticModel, int position, NameSyntax name, CancellationToken cancellationToken)
{
// Bind the interface name which is to the left of the dot
var syntaxTree = semanticModel.SyntaxTree;
var nameBinding = semanticModel.GetSymbolInfo(name, cancellationToken);
// var context = CSharpSyntaxContext.CreateContext(document.Project.Solution.Workspace, semanticModel, position, cancellationToken);
var symbol = nameBinding.Symbol as ITypeSymbol;
if (symbol == null || symbol.TypeKind != TypeKind.Interface)
{
return Task.FromResult (Enumerable.Empty<CompletionData> ());
}
var members = semanticModel.LookupSymbols (
position: name.SpanStart,
container: symbol)
.Where (s => !s.IsStatic);
// .FilterToVisibleAndBrowsableSymbols(document.ShouldHideAdvancedMembers(), semanticModel.Compilation);
// We're going to create a entry for each one, including the signature
var completions = new List<CompletionData>();
// var signatureDisplayFormat =
// new SymbolDisplayFormat(
// genericsOptions: SymbolDisplayGenericsOptions.IncludeTypeParameters,
// memberOptions:
// SymbolDisplayMemberOptions.IncludeParameters,
// parameterOptions:
// SymbolDisplayParameterOptions.IncludeName |
// SymbolDisplayParameterOptions.IncludeType |
// SymbolDisplayParameterOptions.IncludeParamsRefOut,
// miscellaneousOptions:
// SymbolDisplayMiscellaneousOptions.EscapeKeywordIdentifiers |
// SymbolDisplayMiscellaneousOptions.UseSpecialTypes);
var namePosition = name.SpanStart;
// var text = await context.SyntaxTree.GetTextAsync(cancellationToken).ConfigureAwait(false);
// var textChangeSpan = GetTextChangeSpan(text, context.Position);
foreach (var member in members)
{
// var displayString = member.ToMinimalDisplayString(semanticModel, namePosition, signatureDisplayFormat);
// var memberCopied = member;
// var insertionText = displayString;
completions.Add(engine.Factory.CreateSymbolCompletionData (this, member)
/*new SymbolCompletionItem(
this,
displayString,
insertionText: insertionText,
filterSpan: textChangeSpan,
position: position,
symbols: new List<ISymbol> { member },
context: context) */);
}
return Task.FromResult ((IEnumerable<CompletionData>)completions);
}
static string GetName(SemanticModel model, TextSpan span, string[] variableNames)
{
var symbols = model.LookupSymbols(span.Start).ToList();
for (int i = 0; i < 1000; i++)
{
foreach (var vn in variableNames)
{
string id = i > 0 ? vn + i : vn;
if (symbols.All(s => s.Name != id))
return id;
}
}
return null;
}
private bool TryGetIndexers(int position, SemanticModel semanticModel, ExpressionSyntax expression, CancellationToken cancellationToken, out IEnumerable<IPropertySymbol> indexers, out ITypeSymbol expressionType)
{
expressionType = semanticModel.GetTypeInfo(expression, cancellationToken).Type;
if (expressionType == null)
{
indexers = null;
return false;
}
if (expressionType is IErrorTypeSymbol)
{
// If `expression` is a QualifiedNameSyntax then GetTypeInfo().Type won't have any CandidateSymbols, so
// we should then fall back to getting the actual symbol for the expression.
expressionType = (expressionType as IErrorTypeSymbol).CandidateSymbols.FirstOrDefault().GetSymbolType()
?? semanticModel.GetSymbolInfo(expression).GetAnySymbol().GetSymbolType();
}
indexers = semanticModel.LookupSymbols(position, expressionType, WellKnownMemberNames.Indexer).OfType<IPropertySymbol>();
return true;
}
public IEnumerable<Location> ComputePossibleImplicitUsageConflicts(
ISymbol renamedSymbol,
SemanticModel semanticModel,
Location originalDeclarationLocation,
int newDeclarationLocationStartingPosition,
CancellationToken cancellationToken)
{
// TODO: support other implicitly used methods like dispose
if ((renamedSymbol.Name == "MoveNext" || renamedSymbol.Name == "GetEnumerator" || renamedSymbol.Name == "Current") && renamedSymbol.GetAllTypeArguments().Length == 0)
{
// TODO: partial methods currently only show the location where the rename happens as a conflict.
// Consider showing both locations as a conflict.
var baseType = renamedSymbol.ContainingType.GetBaseTypes().FirstOrDefault();
if (baseType != null)
{
var implicitSymbols = semanticModel.LookupSymbols(
newDeclarationLocationStartingPosition,
baseType,
renamedSymbol.Name)
.Where(sym => !sym.Equals(renamedSymbol));
foreach (var symbol in implicitSymbols)
{
if (symbol.GetAllTypeArguments().Length != 0)
{
continue;
}
if (symbol.Kind == SymbolKind.Method)
{
var method = (IMethodSymbol)symbol;
if (symbol.Name == "MoveNext")
{
if (!method.ReturnsVoid && !method.Parameters.Any() && method.ReturnType.SpecialType == SpecialType.System_Boolean)
{
return SpecializedCollections.SingletonEnumerable(originalDeclarationLocation);
}
}
else if (symbol.Name == "GetEnumerator")
{
// we are a bit pessimistic here.
// To be sure we would need to check if the returned type is having a MoveNext and Current as required by foreach
if (!method.ReturnsVoid &&
!method.Parameters.Any())
{
return SpecializedCollections.SingletonEnumerable(originalDeclarationLocation);
}
}
}
else if (symbol.Kind == SymbolKind.Property && symbol.Name == "Current")
{
var property = (IPropertySymbol)symbol;
if (!property.Parameters.Any() && !property.IsWriteOnly)
{
return SpecializedCollections.SingletonEnumerable(originalDeclarationLocation);
}
}
}
}
}
return SpecializedCollections.EmptyEnumerable<Location>();
}
CodeAction GetAction(Document document, SemanticModel model, SyntaxNode root, SyntaxNode node, MethodDeclarationSyntax method)
{
return CodeActionFactory.Create(node.Span, DiagnosticSeverity.Info, GettextCatalog.GetString("Extract anonymous method"), t2 =>
{
var identifier = SyntaxFactory.IdentifierName(NameGenerator.EnsureUniqueness("Method", model.LookupSymbols(node.SpanStart).Select(s => s.Name)));
var surroundingMemberDeclaration = node.GetAncestor<MemberDeclarationSyntax>();
var rootWithTrackedMember = root.TrackNodes(node, surroundingMemberDeclaration);
var newRoot = rootWithTrackedMember.ReplaceNode(rootWithTrackedMember.GetCurrentNode(node), identifier);
newRoot = newRoot
.InsertNodesBefore(newRoot.GetCurrentNode(surroundingMemberDeclaration),
new[] { method.WithTrailingTrivia(surroundingMemberDeclaration.GetTrailingTrivia()) });
return Task.FromResult(document.WithSyntaxRoot(newRoot));
});
}
ParameterHintingResult HandleTypeParameterCase(SemanticModel semanticModel, SyntaxNode node, CancellationToken cancellationToken)
{
var result = new ParameterHintingResult(node.SpanStart);
string typeName;
var gns = node as GenericNameSyntax;
if (gns != null) {
typeName = gns.Identifier.ToString ();
} else {
typeName = node.ToString ();
}
foreach (var cand in semanticModel.LookupSymbols (node.SpanStart).OfType<INamedTypeSymbol> ()) {
if (cand.TypeParameters.Length == 0)
continue;
if (cand.Name == typeName || cand.GetFullName () == typeName)
result.AddData(factory.CreateTypeParameterDataProvider(cand));
}
if (result.Count == 0) {
foreach (var cand in semanticModel.LookupSymbols (node.SpanStart).OfType<IMethodSymbol> ()) {
if (cand.TypeParameters.Length == 0)
continue;
if (cand.Name == typeName)
result.AddData (factory.CreateTypeParameterDataProvider (cand));
}
}
return result;
}
private static string FindAvailableStringBuilderVariableName(AssignmentExpressionSyntax assignmentExpression, SemanticModel semanticModel)
{
const string builderNameBase = "builder";
var builderName = builderNameBase;
var builderNameIncrementer = 0;
while (semanticModel.LookupSymbols(assignmentExpression.GetLocation().SourceSpan.Start, name: builderName).Any())
builderName = builderNameBase + ++builderNameIncrementer;
return builderName;
}
public static string DetectSynchronousUsages(this IMethodSymbol methodCallSymbol, SemanticModel semanticModel)
{
var list = semanticModel.LookupSymbols(0, container: methodCallSymbol.ContainingType,
includeReducedExtensionMethods: true);
var name = methodCallSymbol.Name;
if (name.Equals("Sleep"))
{
return "Task.Delay";
}
foreach (var tmp in list)
{
//if (tmp.Name.Equals("Begin" + name))
//{
// return tmp.Name;
//}
if (tmp.Name.Equals(name + "Async"))
{
if(!name.Equals("Invoke"))
return tmp.Name;
}
}
return "None";
}
public static ITypeSymbol InferAwaitableReturnType(this ISymbol symbol, SemanticModel semanticModel, int position)
{
var methodSymbol = symbol as IMethodSymbol;
if (methodSymbol == null)
{
return null;
}
var returnType = methodSymbol.ReturnType;
if (returnType == null)
{
return null;
}
var potentialGetAwaiters = semanticModel.LookupSymbols(position, container: returnType, name: WellKnownMemberNames.GetAwaiter, includeReducedExtensionMethods: true);
var getAwaiters = potentialGetAwaiters.OfType<IMethodSymbol>().Where(x => !x.Parameters.Any());
if (!getAwaiters.Any())
{
return null;
}
var getResults = getAwaiters.SelectMany(g => semanticModel.LookupSymbols(position, container: g.ReturnType, name: WellKnownMemberNames.GetResult));
var getResult = getResults.OfType<IMethodSymbol>().FirstOrDefault(g => !g.IsStatic);
if (getResult == null)
{
return null;
}
return getResult.ReturnType;
}
/// <summary>
/// If the <paramref name="symbol"/> is a method symbol, returns True if the method's return type is "awaitable".
/// If the <paramref name="symbol"/> is a type symbol, returns True if that type is "awaitable".
/// An "awaitable" is any type that exposes a GetAwaiter method which returns a valid "awaiter". This GetAwaiter method may be an instance method or an extension method.
/// </summary>
public static bool IsAwaitable(this ISymbol symbol, SemanticModel semanticModel, int position)
{
IMethodSymbol methodSymbol = symbol as IMethodSymbol;
ITypeSymbol typeSymbol = null;
if (methodSymbol == null)
{
typeSymbol = symbol as ITypeSymbol;
if (typeSymbol == null)
{
return false;
}
}
else
{
if (methodSymbol.ReturnType == null)
{
return false;
}
// dynamic
if (methodSymbol.ReturnType.TypeKind == TypeKind.Dynamic &&
methodSymbol.MethodKind != MethodKind.BuiltinOperator)
{
return true;
}
}
// otherwise: needs valid GetAwaiter
var potentialGetAwaiters = semanticModel.LookupSymbols(position,
container: typeSymbol ?? methodSymbol.ReturnType.OriginalDefinition,
name: WellKnownMemberNames.GetAwaiter,
includeReducedExtensionMethods: true);
var getAwaiters = potentialGetAwaiters.OfType<IMethodSymbol>().Where(x => !x.Parameters.Any());
return getAwaiters.Any(VerifyGetAwaiter);
}
private static string GetIdentifierName(ObjectCreationExpressionSyntax objectCreation, SemanticModel semanticModel)
{
var identifierName = "disposableObject";
var type = objectCreation.Type;
if (type.IsKind(SyntaxKind.QualifiedName))
{
var name = (QualifiedNameSyntax)type;
identifierName = LowerCaseFirstLetter(name.Right.Identifier.ValueText);
}
else if (type is SimpleNameSyntax)
{
var name = (SimpleNameSyntax)type;
identifierName = LowerCaseFirstLetter(name.Identifier.ValueText);
}
var confilctingNames = from symbol in semanticModel.LookupSymbols(objectCreation.SpanStart)
let symbolIdentifierName = symbol?.ToDisplayParts().LastOrDefault(AnalyzerExtensions.IsName).ToString()
where symbolIdentifierName != null && symbolIdentifierName.StartsWith(identifierName)
select symbolIdentifierName;
var identifierPostFix = 0;
while (confilctingNames.Any(p => p == identifierName + ++identifierPostFix)) { }
return identifierName + (identifierPostFix == 0 ? "" : identifierPostFix.ToString());
}
static MethodDeclarationSyntax GetMethod(SemanticModel context, TextSpan span, IMethodSymbol lambdaSymbol, BlockSyntax body)
{
TypeSyntax returnType = null;
if (lambdaSymbol.ReturnsVoid)
{
returnType = SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.VoidKeyword));
}
else
{
var type = lambdaSymbol.ReturnType;
returnType = type.TypeKind == TypeKind.Unknown ?
SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.VoidKeyword)) :
SyntaxFactory.ParseTypeName(type.Name).WithAdditionalAnnotations(Simplifier.Annotation);
}
var methodParameters = SyntaxFactory.ParameterList(
SyntaxFactory.SeparatedList(lambdaSymbol.Parameters.Select(p => SyntaxFactory.Parameter(
SyntaxFactory.List<AttributeListSyntax>(),
SyntaxFactory.TokenList(),
SyntaxFactory.ParseTypeName(p.Type.Name),
SyntaxFactory.Identifier(p.Name),
null
))
));
var method = SyntaxFactory.MethodDeclaration(returnType, NameGenerator.EnsureUniqueness("Method", context.LookupSymbols(span.Start).Select(s => s.Name)))
.WithParameterList(methodParameters)
.WithBody(body);
if (lambdaSymbol.IsAsync)
method = method.WithModifiers(SyntaxFactory.TokenList(SyntaxFactory.Token(SyntaxKind.AsyncKeyword)));
return method.WithAdditionalAnnotations(Formatter.Annotation, Simplifier.Annotation);
}