private static bool IsSystemException(CatchDeclarationSyntax catchDeclaration, SemanticModel semanticModel)
{
var caughtTypeSyntax = catchDeclaration?.Type;
return(caughtTypeSyntax == null ||
semanticModel.GetTypeInfo(caughtTypeSyntax).Type.Is(KnownType.System_Exception));
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
var type = node.Type.ToString();
var identifier = node.Identifier.ValueText;
_currentNode = new CatchDeclaration(type, identifier);
}
protected override ISymbol GetExceptionTypeSymbolFromCatchClause(CatchClauseSyntax catchNode, SemanticModel model)
{
Debug.Assert(catchNode != null);
CatchDeclarationSyntax typeDeclNode = catchNode.Declaration;
return(typeDeclNode == null ? TypesOfInterest.SystemObject : typeDeclNode.Type.GetDeclaredOrReferencedSymbol(model));
}
public static void Analyze(SyntaxNodeAnalysisContext context, CatchClauseSyntax catchClause)
{
CatchDeclarationSyntax declaration = catchClause.Declaration;
if (declaration != null)
{
BlockSyntax block = catchClause.Block;
if (block != null &&
declaration.Type != null &&
!block.Statements.Any())
{
ITypeSymbol typeSymbol = context
.SemanticModel
.GetTypeSymbol(declaration.Type, context.CancellationToken);
if (typeSymbol?.IsErrorType() == false)
{
INamedTypeSymbol exceptionTypeSymbol = context.GetTypeByMetadataName(MetadataNames.System_Exception);
if (typeSymbol.Equals(exceptionTypeSymbol))
{
context.ReportDiagnostic(
DiagnosticDescriptors.AvoidEmptyCatchClauseThatCatchesSystemException,
catchClause.CatchKeyword.GetLocation());
}
}
}
}
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
if (node.Identifier != null)
{
map.Add(node.Identifier.ValueText, node.Identifier);
}
base.VisitCatchDeclaration(node);
}
private async static Task <Document> RemoveVariableAsync(Document document, CatchDeclarationSyntax variableUnused, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken);
var newRoot = root.ReplaceNode(variableUnused, variableUnused.Update(variableUnused.OpenParenToken, variableUnused.Type.WithoutTrailingTrivia(), new SyntaxToken(), variableUnused.CloseParenToken));
return(document.WithSyntaxRoot(newRoot));
}
private async static Task<Document> RemoveVariableAsync(Document document, CatchDeclarationSyntax variableUnused, CancellationToken cancellationToken)
{
var root = await document.GetSyntaxRootAsync(cancellationToken);
var newRoot = root.ReplaceNode(variableUnused, variableUnused.Update(variableUnused.OpenParenToken, variableUnused.Type.WithoutTrailingTrivia(), new SyntaxToken(), variableUnused.CloseParenToken));
return document.WithSyntaxRoot(newRoot);
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
Information.Add(InfoExtractor.Info.NAME, node.Identifier.Value);
node.Type?.Accept(this);
base.VisitCatchDeclaration(node);
}
private static bool IsCatchingNullReferenceException(CatchDeclarationSyntax catchDeclaration,
SemanticModel semanticModel)
{
var caughtTypeSyntax = catchDeclaration?.Type;
return(caughtTypeSyntax != null &&
semanticModel.GetTypeInfo(caughtTypeSyntax).Type.Is(KnownType.System_NullReferenceException));
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
if (node.Identifier != null)
{
map.Add(node.Identifier.ValueText, node.Identifier);
}
base.VisitCatchDeclaration(node);
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
if (node.Identifier != default)
{
VisitLocal(node);
}
base.VisitCatchDeclaration(node);
}
public static void AnalyzeCatchClause(SyntaxNodeAnalysisContext context)
{
var catchClause = (CatchClauseSyntax)context.Node;
BlockSyntax block = catchClause.Block;
if (block == null)
{
return;
}
CatchDeclarationSyntax declaration = catchClause.Declaration;
if (declaration == null)
{
return;
}
SemanticModel semanticModel = context.SemanticModel;
CancellationToken cancellationToken = context.CancellationToken;
ILocalSymbol symbol = semanticModel.GetDeclaredSymbol(declaration, cancellationToken);
if (symbol?.IsErrorType() != false)
{
return;
}
//TODO: SyntaxWalker
foreach (SyntaxNode node in block.DescendantNodes(descendIntoChildren: f => f.Kind() != SyntaxKind.CatchClause))
{
if (node.Kind() != SyntaxKind.ThrowStatement)
{
continue;
}
var throwStatement = (ThrowStatementSyntax)node;
ExpressionSyntax expression = throwStatement.Expression;
if (expression == null)
{
continue;
}
ISymbol expressionSymbol = semanticModel.GetSymbol(expression, cancellationToken);
if (!symbol.Equals(expressionSymbol))
{
continue;
}
context.ReportDiagnostic(
DiagnosticDescriptors.RemoveOriginalExceptionFromThrowStatement,
expression);
}
}
public override SyntaxNode VisitCatchDeclaration(CatchDeclarationSyntax node)
{
if (node.Identifier.ValueText != null)
{
var newIdName = RegisterNewReanmedVariable(node.Identifier.ValueText);
node = node.WithIdentifier(SyntaxFactory.Identifier(newIdName));
}
return(base.VisitCatchDeclaration(node));
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
var exceptionType = this.semanticModel.GetTypeInfo(node.Type).Type;
if (exceptionType != null)
{
addDependency(this.currentClass, Dependency.DECLARE, exceptionType.ToString());
}
base.VisitCatchDeclaration(node);
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
ISymbol typeSymbol = semanticModel.GetTypeInfo(node.Type).Type;
var exceptionClass = (FAMIX.Class)importer.EnsureType(typeSymbol, typeof(FAMIX.Class));
FAMIX.CaughtException caughtException = importer.New <FAMIX.CaughtException>();
caughtException.definingMethod = currentMethod;
caughtException.exceptionClass = exceptionClass;
base.VisitCatchDeclaration(node);
}
private static bool CatchIsTooGeneric(SyntaxNodeAnalysisContext context, CatchDeclarationSyntax declaration)
{
var symbol = context.SemanticModel.GetSymbolInfo(declaration.Type);
if (symbol.Symbol == null)
{
return false;
}
var exception = context.SemanticModel.Compilation.GetTypeByMetadataName(typeof(Exception).FullName);
return symbol.Symbol == exception;
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
var identifier = node.Identifier;
if (identifier.Span.Length != 0)
{
FindSpellingMistakesForIdentifier(identifier);
}
base.VisitCatchDeclaration(node);
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
ISymbol exceptionSymbol = _semanticModel.GetSymbolInfo(node.Type).Symbol;
if (exceptionSymbol.ToString() != "System.Exception")
{
throw new NotSupportedException("Catch block for inherited exception types is not supported");
}
base.VisitCatchDeclaration(node);
}
private CatchClauseSyntax ParseCatchClause(bool hasCatchAll)
{
Debug.Assert(this.CurrentToken.Kind == SyntaxKind.CatchKeyword);
var @catch = this.EatToken();
// Check for the error of catch clause following empty catch here.
if (hasCatchAll)
{
@catch = this.AddError(@catch, ErrorCode.ERR_TooManyCatches);
}
CatchDeclarationSyntax decl = null;
var saveTerm = this._termState;
if (this.CurrentToken.Kind == SyntaxKind.OpenParenToken)
{
var openParen = this.EatToken();
this._termState |= TerminatorState.IsEndOfCatchClause;
var type = this.ParseClassType();
SyntaxToken name = null;
if (this.IsTrueIdentifier())
{
name = this.ParseIdentifierToken();
}
this._termState = saveTerm;
var closeParen = this.EatToken(SyntaxKind.CloseParenToken);
decl = _syntaxFactory.CatchDeclaration(openParen, type, name, closeParen);
}
CatchFilterClauseSyntax filter = null;
if (this.CurrentToken.Kind == SyntaxKind.IfKeyword)
{
var ifKeyword = CheckFeatureAvailability(this.EatToken(), MessageID.IDS_FeatureExceptionFilter);
this._termState |= TerminatorState.IsEndOfilterClause;
var openParen = this.EatToken(SyntaxKind.OpenParenToken);
var filterExpression = this.ParseExpression();
this._termState = saveTerm;
var closeParen = this.EatToken(SyntaxKind.CloseParenToken);
filter = _syntaxFactory.CatchFilterClause(ifKeyword, openParen, filterExpression, closeParen);
}
this._termState |= TerminatorState.IsEndOfCatchBlock;
var block = this.ParseBlock();
this._termState = saveTerm;
return(_syntaxFactory.CatchClause(@catch, decl, filter, block));
}
public override void AddChildren()
{
Kind = Node.Kind();
_catchKeyword = ((CatchClauseSyntax)Node).CatchKeyword;
_catchKeywordIsChanged = false;
_declaration = ((CatchClauseSyntax)Node).Declaration;
_declarationIsChanged = false;
_filter = ((CatchClauseSyntax)Node).Filter;
_filterIsChanged = false;
_block = ((CatchClauseSyntax)Node).Block;
_blockIsChanged = false;
}
public static void Write(this CatchDeclarationSyntax syntax, IIndentedTextWriterWrapper textWriter, IContext context)
{
if (syntax.Type != null)
{
var symbol = (ITypeSymbol)context.SemanticModel.GetSymbolInfo(syntax.Type).Symbol;
textWriter.Write("type = ");
context.TypeReferenceWriter.WriteTypeReference(symbol, textWriter);
textWriter.WriteLine(",");
}
textWriter.WriteLine("func = function({0})", syntax.Identifier.Text);
}
private static void AnalyzeCatchClause(SyntaxNodeAnalysisContext context)
{
var catchClause = (CatchClauseSyntax)context.Node;
CatchDeclarationSyntax declaration = catchClause.Declaration;
if (declaration == null)
{
return;
}
SemanticModel semanticModel = context.SemanticModel;
CancellationToken cancellationToken = context.CancellationToken;
ILocalSymbol symbol = semanticModel.GetDeclaredSymbol(declaration, cancellationToken);
if (symbol?.IsErrorType() != false)
{
return;
}
ExpressionSyntax expression = null;
Walker walker = null;
try
{
walker = Walker.GetInstance();
walker.Symbol = symbol;
walker.SemanticModel = semanticModel;
walker.CancellationToken = cancellationToken;
walker.VisitBlock(catchClause.Block);
expression = walker.ThrowStatement?.Expression;
}
finally
{
if (walker != null)
{
Walker.Free(walker);
}
}
if (expression != null)
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticRules.RemoveOriginalExceptionFromThrowStatement,
expression);
}
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
if (!PreVisit(node))
{
return;
}
node.Type?.Accept(this);
base.VisitCatchDeclaration(node);
PostVisit(node);
}
// TODO: copy-paste! Refactor if needed!
private static bool CatchIsTooGeneric(SyntaxNodeAnalysisContext context, CatchDeclarationSyntax declaration)
{
var symbol = context.SemanticModel.GetSymbolInfo(declaration.Type);
if (symbol.Symbol == null)
{
return(false);
}
var exception = context.SemanticModel.Compilation.GetTypeByMetadataName(typeof(Exception).FullName);
return(symbol.Symbol == exception);
}
public static VariableDeclaration Create(Context cx, CatchDeclarationSyntax d, bool isVar, IExpressionParentEntity parent, int child)
{
var symbol = cx.GetModel(d).GetDeclaredSymbol(d) !;
var type = symbol.GetAnnotatedType();
var ret = Create(cx, d, type, parent, child);
cx.Try(d, null, () =>
{
var declSymbol = cx.GetModel(d).GetDeclaredSymbol(d) !;
var l = LocalVariable.Create(cx, declSymbol);
l.PopulateManual(ret, isVar);
TypeMention.Create(cx, d.Type, ret, type);
});
return(ret);
}
public static VariableDeclaration Create(Context cx, CatchDeclarationSyntax d, bool isVar, IExpressionParentEntity parent, int child)
{
var type = Type.Create(cx, cx.Model(d).GetDeclaredSymbol(d).Type);
var ret = Create(cx, d, type, isVar, parent, child);
cx.Try(d, null, () =>
{
var id = d.Identifier;
var declSymbol = cx.Model(d).GetDeclaredSymbol(d);
var location = cx.Create(id.GetLocation());
LocalVariable.Create(cx, declSymbol, ret, isVar, location);
TypeMention.Create(cx, d.Type, ret, type);
});
return(ret);
}
public CSharpSyntaxNode Convert(CatchClause node)
{
BlockSyntax csCatchBlock = node.Block.ToCsNode <BlockSyntax>();
if (node.VariableDeclaration == null)
{
return(SyntaxFactory.CatchClause().WithBlock(csCatchBlock));
}
else
{
CatchDeclarationSyntax csCatchDeclaration = SyntaxFactory.CatchDeclaration(
SyntaxFactory.IdentifierName(node.VariableDeclaration.Type.Text),
SyntaxFactory.Identifier(node.VariableDeclaration.Name.Text));
return(SyntaxFactory.CatchClause().WithDeclaration(csCatchDeclaration).WithBlock(csCatchBlock));
}
}
public static bool CatchIsTooGeneric(this CatchDeclarationSyntax declaration, SemanticModel semanticModel)
{
if (declaration == null)
{
return(true);
}
var symbol = semanticModel.GetSymbolInfo(declaration.Type).Symbol;
if (symbol == null)
{
return(false);
}
var compilation = semanticModel.Compilation;
return(IsGenericException(symbol, compilation));
}
/// <summary>
/// Traverse AST node that represents catch clause parameter declaration
/// </summary>
/// <param name="node">AST node.</param>
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
try
{
var symbol = _sm.GetDeclaredSymbol(node);
if (symbol != null)
{
var def = Def.For(symbol: symbol, type: "local", name: symbol.Name).At(_path, node.Identifier.Span);
def.Local = true;
def.Exported = false;
AddDef(def);
}
base.VisitCatchDeclaration(node);
}
catch (Exception e)
{
}
}
public static bool CatchIsTooGeneric(this CatchDeclarationSyntax declaration, SemanticModel semanticModel)
{
if (declaration == null)
{
return(true);
}
var symbol = semanticModel.GetSymbolInfo(declaration.Type);
if (symbol.Symbol == null)
{
return(false);
}
var exception = semanticModel.Compilation.GetTypeByMetadataName(typeof(Exception).FullName);
return(symbol.Symbol.Equals(exception));
}
public override SyntaxNode VisitCatchDeclaration(CatchDeclarationSyntax node)
{
string newCatch = null;
foreach (var c in catchReplacementList)
{
if (node.Type.ToString().Contains(c.Key))
{
newCatch = node.Type.ToString().Replace(c.Key, c.Value);
}
}
if (newCatch != null)
{
return(CatchDeclaration(ParseTypeName(newCatch), node.Identifier));
}
else
{
return(base.VisitCatchDeclaration(node));
}
}
public static void Analyze(SyntaxNodeAnalysisContext context, CatchClauseSyntax catchClause)
{
CatchDeclarationSyntax declaration = catchClause.Declaration;
if (declaration != null)
{
BlockSyntax block = catchClause.Block;
if (block != null)
{
ILocalSymbol symbol = context
.SemanticModel
.GetDeclaredSymbol(catchClause.Declaration, context.CancellationToken);
if (symbol != null)
{
foreach (SyntaxNode node in block.DescendantNodes(f => !f.IsKind(SyntaxKind.CatchClause)))
{
if (node.IsKind(SyntaxKind.ThrowStatement))
{
var throwStatement = (ThrowStatementSyntax)node;
if (throwStatement.Expression != null)
{
ISymbol expressionSymbol = context
.SemanticModel
.GetSymbol(throwStatement.Expression, context.CancellationToken);
if (expressionSymbol != null &&
symbol.Equals(expressionSymbol))
{
context.ReportDiagnostic(
DiagnosticDescriptors.RemoveOriginalExceptionFromThrowStatement,
throwStatement.Expression);
}
}
}
}
}
}
}
}
private Diagnostic AnalyzeCatchDeclaration(CatchDeclarationSyntax node)
{
if (node is null)
{
return(null); // we don't have an exception
}
var identifier = node.Identifier;
var name = identifier.ValueText;
switch (name)
{
case null: // we don't have one
case "": // we don't have one
case ExpectedName: // correct identifier
return(null);
default:
return(Issue(name, identifier, ExpectedName));
}
}
/// <summary>
/// Given a catch declaration, get the symbol for the exception variable
/// </summary>
/// <param name="cancellationToken">The cancellation token.</param>
/// <param name="catchDeclaration"></param>
public ILocalSymbol GetDeclaredSymbol(CatchDeclarationSyntax catchDeclaration, CancellationToken cancellationToken = default(CancellationToken))
{
CSharpSyntaxNode catchClause = catchDeclaration.Parent; //Syntax->Binder map is keyed on clause, not decl
Debug.Assert(catchClause.Kind() == SyntaxKind.CatchClause);
Binder enclosingBinder = this.GetEnclosingBinder(GetAdjustedNodePosition(catchClause));
if (enclosingBinder == null)
{
return null;
}
Binder catchBinder = enclosingBinder.GetBinder(catchClause);
// Binder.GetBinder can fail in presence of syntax errors.
if (catchBinder == null)
{
return null;
}
catchBinder = enclosingBinder.GetBinder(catchClause);
LocalSymbol local = catchBinder.GetDeclaredLocalsForScope(catchClause).FirstOrDefault();
return ((object)local != null && local.DeclarationKind == LocalDeclarationKind.CatchVariable)
? local
: null;
}
public CatchDeclarationTranslation(CatchDeclarationSyntax syntax, SyntaxTranslation parent) : base(syntax, parent)
{
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
_builder.Add(node);
base.VisitCatchDeclaration(node);
}
/// <summary>
///
/// </summary>
/// <param name="node"></param>
public override sealed void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
this.OnNodeVisited(node, this.type.IsInstanceOfType(node));
base.VisitCatchDeclaration(node);
}
/// <summary>
///
/// </summary>
/// <param name="node"></param>
public override sealed void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
this.OnNodeVisited(node);
if (!this.traverseRootOnly) base.VisitCatchDeclaration(node);
}
public void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
if (node == null)
throw new ArgumentNullException("node");
node.Validate();
_writer.WriteSyntax(Syntax.OpenParen);
if (_writer.Configuration.Spaces.WithinParentheses.CatchParentheses)
_writer.WriteSpace();
node.Type.Accept(this);
if (node.Identifier != null)
{
_writer.WriteSpace();
_writer.WriteIdentifier(node.Identifier);
}
if (_writer.Configuration.Spaces.WithinParentheses.CatchParentheses)
_writer.WriteSpace();
_writer.WriteSyntax(Syntax.CloseParen);
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
this.Found |= node.Identifier.ValueText == this.name;
base.VisitCatchDeclaration(node);
}
public override void VisitCatchDeclaration(CatchDeclarationSyntax node)
{
base.VisitCatchDeclaration(node);
Add(node.Identifier);
}
private IEnumerable<ITypeSymbol> InferTypeInCatchDeclaration(CatchDeclarationSyntax catchDeclaration, SyntaxToken? previousToken = null)
{
// If we have a position, it has to be after "catch("
if (previousToken.HasValue && previousToken.Value != catchDeclaration.OpenParenToken)
{
return SpecializedCollections.EmptyEnumerable<ITypeSymbol>();
}
return SpecializedCollections.SingletonEnumerable(this.Compilation.ExceptionType());
}