private void GenerateStatement(StatementSyntax statement)
{
var success = false;
int mark = GetMark();
switch (statement.Kind())
{
case SyntaxKind.LocalDeclarationStatement:
success = TryGenerateLocal((LocalDeclarationStatementSyntax)statement);
break;
case SyntaxKind.Block:
success = true;
GenerateBlock((BlockSyntax)statement);
break;
case SyntaxKind.ExpressionStatement:
success = TryGenerateExpressionStatement((ExpressionStatementSyntax)statement);
break;
}
if (!success)
{
Rewind(mark);
GenerateUnknown(statement);
}
// Just for readability
LineBreak();
}
private bool CheckStatement(SemanticModel semanticModel, StatementSyntax statement, CancellationToken cancellationToken)
{
if (statement is CheckedStatementSyntax ||
statement is DoStatementSyntax ||
statement is EmptyStatementSyntax ||
statement is ExpressionStatementSyntax ||
statement is FixedStatementSyntax ||
statement is ForEachStatementSyntax ||
statement is ForStatementSyntax ||
statement is IfStatementSyntax ||
statement is LocalDeclarationStatementSyntax ||
statement is LockStatementSyntax ||
statement is ReturnStatementSyntax ||
statement is SwitchStatementSyntax ||
statement is ThrowStatementSyntax ||
statement is TryStatementSyntax ||
statement is UnsafeStatementSyntax ||
statement is UsingStatementSyntax ||
statement is WhileStatementSyntax)
{
return true;
}
return false;
}
private static ExpressionSyntax TryGetExpression(StatementSyntax firstStatement)
{
if (firstStatement.Kind() == SyntaxKind.ExpressionStatement)
{
return ((ExpressionStatementSyntax)firstStatement).Expression;
}
else if (firstStatement.Kind() == SyntaxKind.ReturnStatement)
{
var returnStatement = (ReturnStatementSyntax)firstStatement;
if (returnStatement.Expression != null)
{
// If there are any comments on the return keyword, move them to
// the expression.
return firstStatement.GetLeadingTrivia().Any(t => t.IsSingleOrMultiLineComment())
? returnStatement.Expression.WithLeadingTrivia(returnStatement.GetLeadingTrivia())
: returnStatement.Expression;
}
}
else if (firstStatement.Kind() == SyntaxKind.ThrowStatement)
{
var throwStatement = (ThrowStatementSyntax)firstStatement;
if (throwStatement.Expression != null)
{
return SyntaxFactory.ThrowExpression(throwStatement.ThrowKeyword, throwStatement.Expression);
}
}
return null;
}
public ControlFlowNode(StatementSyntax previousStatement, StatementSyntax nextStatement, ControlFlowNodeType type)
{
if (previousStatement == null && nextStatement == null)
throw new ArgumentException("previousStatement and nextStatement must not be both null");
this.PreviousStatement = previousStatement;
this.NextStatement = nextStatement;
this.Type = type;
}
internal static SyntaxNode AddStatementToConstructorBody(SyntaxNode root, ConstructorDeclarationSyntax constructor, StatementSyntax statement)
{
var body = constructor.Body ?? SyntaxFactory.Block();
return root.ReplaceNode(root.GetCurrentNode(constructor), constructor.WithBody(
body.WithStatements(SyntaxFactory.List(new[] { statement }.Concat(body.Statements)))
));
}
private SyntaxNode GetStatementSingle(StatementSyntax statement)
{
var block = statement as BlockSyntax;
return block == null ?
statement :
(block.Statements.Count == 1 ? block.Statements[0] : null);
}
public IfThrowPrecondition(StatementSyntax ifThrowStaement, ThrowStatementSyntax throwStatement)
{
Contract.Requires(ifThrowStaement != null);
Contract.Requires(throwStatement != null);
IfThrowStaement = ifThrowStaement;
ThrowStatement = throwStatement;
}
private static void CheckLoop(SyntaxNodeAnalysisContext context, StatementSyntax statement)
{
if (IsNestedStatement(statement))
{
return;
}
CheckStatement(context, statement, "in a loop", "only once");
}
private static Document MakeObjectInitializer(Document document, SyntaxNode root, StatementSyntax statement, ISymbol variableSymbol, SemanticModel semanticModel)
{
var blockParent = statement.FirstAncestorOrSelf<BlockSyntax>();
var objectCreationExpression = statement.DescendantNodes().OfType<ObjectCreationExpressionSyntax>().Single();
var newBlockParent = CreateNewBlockParent(statement, semanticModel, objectCreationExpression, variableSymbol);
var newRoot = root.ReplaceNode(blockParent, newBlockParent);
var newDocument = document.WithSyntaxRoot(newRoot);
return newDocument;
}
/// <summary>
/// Creates a speculative SemanticModel for a method body that did not appear in the original source code.
/// </summary>
internal static MethodBodySemanticModel CreateSpeculative(SyntaxTreeSemanticModel parentSemanticModel, MethodSymbol owner, StatementSyntax syntax, Binder rootBinder, int position)
{
Debug.Assert(parentSemanticModel != null);
Debug.Assert(syntax != null);
Debug.Assert(rootBinder != null);
Debug.Assert(rootBinder.IsSemanticModelBinder);
return new MethodBodySemanticModel(parentSemanticModel.Compilation, owner, rootBinder, syntax, parentSemanticModel, position);
}
private static SwitchSectionSyntax CreateSection(SwitchLabelSyntax label, StatementSyntax statement)
{
var labels = new SyntaxList<SwitchLabelSyntax>();
labels = labels.Add(label);
return SyntaxFactory.SwitchSection(
labels, CreateSectionStatements(statement)
);
}
private Document ConvertToConditional(Document document, SemanticModel semanticModel, IfStatementSyntax ifStatement, StatementSyntax replacementStatement, CancellationToken cancellationToken)
{
var oldRoot = semanticModel.SyntaxTree.GetRoot();
var newRoot = oldRoot.ReplaceNode(
oldNode: ifStatement,
newNode: replacementStatement.WithAdditionalAnnotations(Formatter.Annotation));
return document.WithSyntaxRoot(newRoot);
}
private static ExpressionSyntax GetMemberAccessIdentifierFromStatements(SemanticModel semanticModel, StatementSyntax statementInsideIf, StatementSyntax statementInsideElse)
{
var expressionIf = statementInsideIf as ExpressionStatementSyntax;
var expressionElse = statementInsideElse as ExpressionStatementSyntax;
var memberAccessExpression = expressionIf != null && expressionElse != null
? GetMemberAccessExpressionFromAssignment(semanticModel, expressionIf.Expression as AssignmentExpressionSyntax, expressionElse.Expression as AssignmentExpressionSyntax)
: GetMemberAccessExpressionFromReturn(statementInsideIf as ReturnStatementSyntax, statementInsideElse as ReturnStatementSyntax);
return memberAccessExpression?.Expression;
}
private async Task<Document> MakeBlockAsync(Document document, StatementSyntax ifChildStatement, CancellationToken c)
{
var block = SyntaxFactory.Block(ifChildStatement);
// Replace the old statement with the block:
var root = await document.GetSyntaxRootAsync();
var newRoot = root.ReplaceNode((SyntaxNode)ifChildStatement, block);
var newDocument = document.WithSyntaxRoot(newRoot);
return newDocument;
}
private static bool IsThrowArgumentExceptionStatement(StatementSyntax statement, SemanticModel semanticModel)
{
var throwStatement = statement as ThrowStatementSyntax;
var objectCreation = throwStatement?.Expression as ObjectCreationExpressionSyntax;
if (objectCreation == null) return false;
var symbol = semanticModel.GetSymbolInfo(objectCreation.Type).Symbol;
return symbol.IsArgumentExceptionType(semanticModel);
}
private static BlockSyntax CreateNewBlockParent(StatementSyntax statement, SemanticModel semanticModel, ObjectCreationExpressionSyntax objectCreationExpression, ISymbol variableSymbol)
{
var blockParent = statement.FirstAncestorOrSelf<BlockSyntax>();
var assignmentExpressions = ObjectInitializerAnalyzer.FindAssignmentExpressions(semanticModel, statement, variableSymbol);
var newBlockParent = SyntaxFactory.Block()
.WithLeadingTrivia(blockParent.GetLeadingTrivia())
.WithTrailingTrivia(blockParent.GetTrailingTrivia())
.WithAdditionalAnnotations(Formatter.Annotation);
var newAssignmentExpressions = new List<ExpressionStatementSyntax>();
for (int i = 0; i < blockParent.Statements.Count; i++)
{
var blockStatement = blockParent.Statements[i];
if (blockStatement.Equals(statement))
{
var initializationExpressions = new List<AssignmentExpressionSyntax>();
foreach (var expressionStatement in assignmentExpressions)
{
var assignmentExpression = expressionStatement.Expression as AssignmentExpressionSyntax;
var memberAccess = assignmentExpression.Left as MemberAccessExpressionSyntax;
var propertyIdentifier = memberAccess.Name as IdentifierNameSyntax;
initializationExpressions.Add(SyntaxFactory.AssignmentExpression(SyntaxKind.SimpleAssignmentExpression, propertyIdentifier, assignmentExpression.Right));
}
var initializers = SyntaxFactory.SeparatedList<ExpressionSyntax>(initializationExpressions);
var newObjectCreationExpression = objectCreationExpression.WithInitializer(
SyntaxFactory.InitializerExpression(
SyntaxKind.ObjectInitializerExpression,
SyntaxFactory.Token(SyntaxFactory.ParseLeadingTrivia(" "), SyntaxKind.OpenBraceToken, SyntaxFactory.ParseTrailingTrivia("\n")),
initializers,
SyntaxFactory.Token(SyntaxFactory.ParseLeadingTrivia(" "), SyntaxKind.CloseBraceToken, SyntaxFactory.ParseTrailingTrivia(""))
))
.WithLeadingTrivia(objectCreationExpression.GetLeadingTrivia())
.WithTrailingTrivia(objectCreationExpression.GetTrailingTrivia())
.WithAdditionalAnnotations(Formatter.Annotation);
if (newObjectCreationExpression.ArgumentList?.Arguments.Count == 0)
{
newObjectCreationExpression = newObjectCreationExpression.WithArgumentList(null);
}
var newLocalDeclarationStatement = statement.ReplaceNode(objectCreationExpression, newObjectCreationExpression)
.WithLeadingTrivia(statement.GetLeadingTrivia())
.WithTrailingTrivia(statement.GetTrailingTrivia())
.WithAdditionalAnnotations(Formatter.Annotation);
newBlockParent = newBlockParent.AddStatements(newLocalDeclarationStatement);
i += initializationExpressions.Count;
}
else
{
newBlockParent = newBlockParent.AddStatements(blockStatement
.WithLeadingTrivia(blockStatement.GetLeadingTrivia())
.WithTrailingTrivia(blockStatement.GetTrailingTrivia())
.WithAdditionalAnnotations(Formatter.Annotation));
}
}
return newBlockParent;
}
protected OperatorDeclarationSyntax CreateOperatorDeclaration(SyntaxKind kind, ParameterSyntax[] parameters, StatementSyntax statement)
{
return SyntaxFactory.OperatorDeclaration(
new SyntaxList<AttributeListSyntax>(),
SyntaxFactory.TokenList(new SyntaxToken[] { SyntaxFactory.Token(SyntaxKind.PublicKeyword), SyntaxFactory.Token(SyntaxKind.StaticKeyword) }),
SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.BoolKeyword)),
SyntaxFactory.Token(SyntaxKind.OperatorKeyword),
SyntaxFactory.Token(kind),
SyntaxFactory.ParameterList(SyntaxFactory.SeparatedList(parameters)),
SyntaxFactory.Block(statement),
new SyntaxToken());
}
protected MethodDeclarationSyntax CreateSimpleMethodDeclaration(string name, StatementSyntax statement)
{
return SyntaxFactory.MethodDeclaration(
new SyntaxList<AttributeListSyntax>(),
SyntaxFactory.TokenList(new SyntaxToken[] { SyntaxFactory.Token(SyntaxKind.PublicKeyword) }),
SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.VoidKeyword)),
null,
SyntaxFactory.Identifier(name),
null,
SyntaxFactory.ParameterList(),
new SyntaxList<TypeParameterConstraintClauseSyntax>(),
SyntaxFactory.Block(statement),
new SyntaxToken());
}
private static int GetNestingLevelStatement(StatementSyntax statement, MethodDeclarationSyntax methodDeclaration)
{
var nestingLevelStatement = IsEnlargersNesting(statement) ? 1 : 0;
var parentStatement = statement.Parent;
while (parentStatement != null && parentStatement != methodDeclaration)
{
if (IsEnlargersNesting(parentStatement))
nestingLevelStatement++;
parentStatement = parentStatement.Parent;
}
return nestingLevelStatement;
}
private RegionAnalysisContext RegionAnalysisContext(StatementSyntax firstStatement, StatementSyntax lastStatement)
{
var memberModel = GetMemberModel(firstStatement);
if (memberModel == null)
{
// Recover from error cases
var node = new BoundBadStatement(firstStatement, ImmutableArray<BoundNode>.Empty, hasErrors: true);
return new RegionAnalysisContext(Compilation, null, node, node, node);
}
Symbol member;
BoundNode boundNode = GetBoundRoot(memberModel, out member);
var first = memberModel.GetUpperBoundNode(firstStatement, promoteToBindable: true);
var last = memberModel.GetUpperBoundNode(lastStatement, promoteToBindable: true);
return new RegionAnalysisContext(Compilation, member, boundNode, first, last);
}
/// <summary>Creates a new ForStatementSyntax instance.</summary>
public static ForStatementSyntax ForStatement(VariableDeclarationSyntax declaration, SeparatedSyntaxList<ExpressionSyntax> initializers, ExpressionSyntax condition, SeparatedSyntaxList<ExpressionSyntax> incrementors, StatementSyntax statement)
{
return ForStatement(
SyntaxFactory.Token(SyntaxKind.ForKeyword),
SyntaxFactory.Token(SyntaxKind.OpenParenToken),
default(SyntaxToken),
null,
declaration,
initializers,
SyntaxFactory.Token(SyntaxKind.SemicolonToken),
condition,
SyntaxFactory.Token(SyntaxKind.SemicolonToken),
incrementors,
SyntaxFactory.Token(SyntaxKind.CloseParenToken),
statement);
}
/// <summary>Creates a new ForStatementSyntax instance.</summary>
public static ForStatementSyntax ForStatement(SyntaxToken forKeyword, SyntaxToken openParenToken, VariableDeclarationSyntax declaration, SeparatedSyntaxList<ExpressionSyntax> initializers, SyntaxToken firstSemicolonToken, ExpressionSyntax condition, SyntaxToken secondSemicolonToken, SeparatedSyntaxList<ExpressionSyntax> incrementors, SyntaxToken closeParenToken, StatementSyntax statement)
{
return ForStatement(
forKeyword: forKeyword,
openParenToken: openParenToken,
refKeyword: default(SyntaxToken),
deconstruction: null,
declaration: declaration,
initializers: initializers,
firstSemicolonToken: firstSemicolonToken,
condition: condition,
secondSemicolonToken: secondSemicolonToken,
incrementors: incrementors,
closeParenToken: closeParenToken,
statement: statement);
}
internal static bool CheckForAssignmentOfLiteral(StatementSyntax statement, SyntaxKind literalExpressionType, out ExpressionSyntax assignmentTarget, out SyntaxTriviaList assignmentTrailingTriviaList)
{
assignmentTarget = null;
assignmentTrailingTriviaList = SyntaxFactory.TriviaList(SyntaxFactory.SyntaxTrivia(SyntaxKind.DisabledTextTrivia, ""));
var expressionStatement = statement as ExpressionStatementSyntax;
if (expressionStatement == null)
return false;
var assignmentExpression = expressionStatement.Expression as AssignmentExpressionSyntax;
if ((assignmentExpression == null) || !assignmentExpression.IsKind(SyntaxKind.SimpleAssignmentExpression))
return false;
assignmentTarget = assignmentExpression.Left as IdentifierNameSyntax;
assignmentTrailingTriviaList = assignmentExpression.OperatorToken.TrailingTrivia;
if (assignmentTarget == null)
assignmentTarget = assignmentExpression.Left as MemberAccessExpressionSyntax;
var rightAssignment = assignmentExpression.Right as LiteralExpressionSyntax;
return (assignmentTarget != null) && (rightAssignment != null) && (rightAssignment.IsKind(literalExpressionType));
}
public static IEnumerable<ReplaceAction> GetSimplifications(ForEachStatementSyntax forLoop, ISemanticModel model, Assumptions assumptions, CancellationToken cancellationToken = default(CancellationToken))
{
if (forLoop.IsAnyIterationSufficient(model, assumptions) == true)
yield break; // a more appropriate code issue handles this case
// can the loop be replaced by its first or last iteration?
var isFirstSufficient = forLoop.IsFirstIterationSufficient(model, assumptions) == true;
var isLastSufficient = forLoop.IsLastIterationSufficient(model, assumptions) == true;
var firstVsLast = isFirstSufficient ? "First"
: isLastSufficient ? "Last"
: null;
if (firstVsLast == null) yield break;
// do we know how to translate?
var loopStatements = forLoop.Statement.Statements();
var rawThenStatements = loopStatements.SkipLast(loopStatements.Last().IsIntraLoopJump() ? 1 : 0).ToArray();
if (rawThenStatements.Any(e => e.HasTopLevelIntraLoopJumps())) yield break; // don't know how to translate jumps that aren't at the end
// wrap collection items in a type with a new null value (so that a null result definitively indicates an empty collection)
var iteratorType = ((LocalSymbol)model.GetDeclaredSymbol(forLoop)).Type;
var nuller = GetNullabledQueryAndValueGetter(iteratorType, forLoop.Identifier, forLoop.Expression);
var nullableQuery = nuller.Item1;
var valueGetter = nuller.Item2;
var tempNullableLocalName = Syntax.Identifier("_" + forLoop.Identifier.ValueText);
var tempNullableLocalGet = Syntax.IdentifierName(tempNullableLocalName);
// build replacement
var iteratorReads = forLoop.Statement.ReadsOfLocalVariable(forLoop.Identifier).ToArray();
var desiredIterationQuery = nullableQuery.Accessing(firstVsLast + "OrDefault").Invoking();
var condition = tempNullableLocalGet.BOpNotEquals(Syntax.LiteralExpression(SyntaxKind.NullLiteralExpression));
var useDenulledLocal = iteratorReads.Length > 2;
var thenStatement = useDenulledLocal
? rawThenStatements.Prepend(forLoop.Identifier.VarInit(valueGetter(tempNullableLocalGet))).Block()
: rawThenStatements.Select(e => e.ReplaceNodes(iteratorReads, (n, a) => valueGetter(tempNullableLocalGet))).Block();
var replacementStatements = new StatementSyntax[] {
tempNullableLocalName.VarInit(desiredIterationQuery),
condition.IfThen(thenStatement)
};
// expose as code action/issue
yield return forLoop.MakeReplaceStatementWithManyAction(
replacementStatements,
"Execute " + firstVsLast + " if any");
}
private static async Task<Document> WrapAsync(Document document, StatementSyntax expressionStatement, CancellationToken token)
{
var identifierNameSyntax =
expressionStatement.DescendantNodes().FirstOrDefault(x => x.IsKind(SyntaxKind.IdentifierName)) as
IdentifierNameSyntax;
if (identifierNameSyntax == null)
return document;
var loggerName = identifierNameSyntax.Identifier.Text;
var expression = SyntaxFactory.ParseExpression(loggerName + ".IsDebugEnabled");
var ifStatement = SyntaxFactory.IfStatement(expression, expressionStatement);
var root = await document.GetSyntaxRootAsync(token);
root = root.ReplaceNode(expressionStatement, ifStatement);
return document.WithSyntaxRoot(root);
}
private static bool IsSelectingADifferentMethod(IEnumerable<SyntaxNode> childNodes, SimpleNameSyntax methodName, SyntaxTree tree, IMethodSymbol methodSymbol, StatementSyntax invocationStatement, Compilation compilation)
{
var parameterExpressions = CallExtensionMethodAsExtensionCodeFixProvider.GetParameterExpressions(childNodes);
var firstArgument = parameterExpressions.FirstOrDefault();
var argumentList = CallExtensionMethodAsExtensionCodeFixProvider.CreateArgumentListSyntaxFrom(parameterExpressions.Skip(1));
var newInvocationStatement = SyntaxFactory.ExpressionStatement(
CallExtensionMethodAsExtensionCodeFixProvider.CreateInvocationExpression(
firstArgument, methodName, argumentList)).WithAdditionalAnnotations(introduceExtensionMethodAnnotation);
var extensionMethodNamespaceUsingDirective = SyntaxFactory.UsingDirective(methodSymbol.ContainingNamespace.ToNameSyntax());
var speculativeRootWithExtensionMethod = tree.GetCompilationUnitRoot()
.ReplaceNode(invocationStatement, newInvocationStatement)
.AddUsings(extensionMethodNamespaceUsingDirective);
var speculativeModel = compilation.ReplaceSyntaxTree(tree, speculativeRootWithExtensionMethod.SyntaxTree)
.GetSemanticModel(speculativeRootWithExtensionMethod.SyntaxTree);
var speculativeInvocationStatement = speculativeRootWithExtensionMethod.SyntaxTree.GetCompilationUnitRoot().GetAnnotatedNodes(introduceExtensionMethodAnnotation).Single() as ExpressionStatementSyntax;
var speculativeExtensionMethodSymbol = speculativeModel.GetSymbolInfo(speculativeInvocationStatement.Expression).Symbol as IMethodSymbol;
var speculativeNonExtensionFormOfTheMethodSymbol = speculativeExtensionMethodSymbol?.GetConstructedReducedFrom();
return speculativeNonExtensionFormOfTheMethodSymbol == null || !speculativeNonExtensionFormOfTheMethodSymbol.Equals(methodSymbol);
}
private static SyntaxNode CalculateNewRoot(SyntaxNode root, Diagnostic diagnostic,
StatementSyntax currentAsStatement, AssignmentExpressionSyntax currentAsAssignment,
BinaryExpressionSyntax currentAsBinary)
{
if (currentAsStatement != null)
{
return root.RemoveNode(currentAsStatement, SyntaxRemoveOptions.KeepNoTrivia);
}
if (currentAsAssignment != null)
{
return root.ReplaceNode(
currentAsAssignment,
currentAsAssignment.Left.WithAdditionalAnnotations(Formatter.Annotation));
}
var isReportingOnLeft = bool.Parse(diagnostic.Properties[SillyBitwiseOperation.IsReportingOnLeftKey]);
return root.ReplaceNode(
currentAsBinary,
(isReportingOnLeft ? currentAsBinary.Right : currentAsBinary.Left).WithAdditionalAnnotations(Formatter.Annotation));
}
private bool IsCut(StatementSyntax statement, SyntaxToken identifier)
{
bool result = false;
if (statement is IfStatementSyntax)
{
var ifStatement = (IfStatementSyntax)statement;
if (ifStatement.Condition is BinaryExpressionSyntax)
{
BinaryExpressionSyntax condition = (BinaryExpressionSyntax)ifStatement.Condition;
if (condition.Left.IsKind(SyntaxKind.NullLiteralExpression) ||
condition.Right.IsKind(SyntaxKind.NullLiteralExpression))
{
if (condition.Left is IdentifierNameSyntax)
result = ((IdentifierNameSyntax)condition.Left).Identifier.Text == identifier.Text;
else if (condition.Right is IdentifierNameSyntax)
result = ((IdentifierNameSyntax)condition.Right).Identifier.Text == identifier.Text;
}
}
}
return result;
}
private static SyntaxList<StatementSyntax> CreateSectionStatements(StatementSyntax source)
{
var result = new SyntaxList<StatementSyntax>();
if (source is BlockSyntax)
{
var block = source as BlockSyntax;
result = result.AddRange(block.Statements);
}
else
{
result = result.Add(source);
}
var lastStatement = result.LastOrDefault();
if (!(lastStatement is ReturnStatementSyntax || lastStatement is ThrowStatementSyntax))
{
result = result.Add(SyntaxFactory.BreakStatement());
}
return result;
}
internal override bool TryGetSpeculativeSemanticModelCore(SyntaxTreeSemanticModel parentModel, int position, StatementSyntax statement, out SemanticModel speculativeModel)
{
position = CheckAndAdjustPosition(position);
var binder = this.GetEnclosingBinder(position);
if (binder == null)
{
speculativeModel = null;
return false;
}
var methodSymbol = (MethodSymbol)this.MemberSymbol;
binder = new ExecutableCodeBinder(statement, methodSymbol, binder);
// local declaration statements need to be wrapped in a block so the local gets seen
if (!statement.IsKind(SyntaxKind.Block))
{
binder = new BlockBinder(methodSymbol, binder, new SyntaxList<StatementSyntax>(statement));
}
speculativeModel = CreateSpeculative(parentModel, methodSymbol, statement, binder, position);
return true;
}
public static void Analyze(SyntaxNodeAnalysisContext context, IfStatementSyntax ifStatement)
{
SyntaxNode parent = ifStatement.Parent;
if (parent?.IsKind(SyntaxKind.Block) == true)
{
ReturnStatementSyntax returnStatement = GetReturnStatement(ifStatement.Statement);
LiteralExpressionSyntax booleanLiteral = GetBooleanLiteral(returnStatement);
if (booleanLiteral != null)
{
ReturnStatementSyntax returnStatement2 = null;
LiteralExpressionSyntax booleanLiteral2 = null;
TextSpan span = ifStatement.Span;
ElseClauseSyntax @else = ifStatement.Else;
if (@else != null)
{
returnStatement2 = GetReturnStatement(@else.Statement);
booleanLiteral2 = GetBooleanLiteral(returnStatement2);
}
else
{
var block = (BlockSyntax)parent;
SyntaxList <StatementSyntax> statements = block.Statements;
int index = statements.IndexOf(ifStatement);
if (index < statements.Count - 1 &&
(index == 0 || !IsIfStatementWithReturnStatement(statements[index - 1])))
{
StatementSyntax nextStatement = statements[index + 1];
if (nextStatement.IsKind(SyntaxKind.ReturnStatement))
{
returnStatement2 = (ReturnStatementSyntax)nextStatement;
booleanLiteral2 = GetBooleanLiteral(returnStatement2);
if (booleanLiteral2 != null)
{
span = TextSpan.FromBounds(ifStatement.SpanStart, returnStatement2.Span.End);
}
}
}
}
if (booleanLiteral2 != null &&
IsOppositeBooleanLiteral(booleanLiteral, booleanLiteral2) &&
parent
.DescendantTrivia(span)
.All(f => f.IsWhitespaceOrEndOfLineTrivia()))
{
context.ReportDiagnostic(
DiagnosticDescriptors.ReplaceIfStatementWithReturnStatement,
Location.Create(context.Node.SyntaxTree, span));
context.FadeOutToken(FadeOutDescriptor, ifStatement.IfKeyword);
context.FadeOutToken(FadeOutDescriptor, ifStatement.OpenParenToken);
context.FadeOutToken(FadeOutDescriptor, ifStatement.CloseParenToken);
context.FadeOutNode(FadeOutDescriptor, ifStatement.Statement);
if (ifStatement.Else != null)
{
context.FadeOutNode(FadeOutDescriptor, @else);
}
else
{
context.FadeOutNode(FadeOutDescriptor, returnStatement2);
}
}
}
}
}
private static Task <Document> GetTransformedDocumentAsync(Document document, SyntaxNode root, StatementSyntax node, CancellationToken cancellationToken)
{
var newSyntaxRoot = root.ReplaceNode(node, SyntaxFactory.Block(node));
return(Task.FromResult(document.WithSyntaxRoot(newSyntaxRoot)));
}
public LockStatementSyntax Update(SyntaxToken lockKeyword, SyntaxToken openParenToken, ExpressionSyntax expression, SyntaxToken closeParenToken, StatementSyntax statement) => Update(AttributeLists, lockKeyword, openParenToken, expression, closeParenToken, statement);
public void TestProperties()
{
var syntaxNode = this.CreateLocalFunctionStatement();
Assert.True(syntaxNode.IsKind(SyntaxKind.LocalFunctionStatement));
Assert.True(syntaxNode.IsKind(SyntaxKindEx.LocalFunctionStatement));
var wrapper = (LocalFunctionStatementSyntaxWrapper)syntaxNode;
Assert.Same(syntaxNode, wrapper.SyntaxNode);
Assert.Equal(syntaxNode.Modifiers, wrapper.Modifiers); // This is a struct, so we can't use Same()
Assert.Same(syntaxNode.ReturnType, wrapper.ReturnType);
Assert.Equal(syntaxNode.Identifier, wrapper.Identifier); // This is a struct, so we can't use Same()
Assert.Same(syntaxNode.TypeParameterList, wrapper.TypeParameterList);
Assert.Same(syntaxNode.ParameterList, wrapper.ParameterList);
Assert.Equal(syntaxNode.ConstraintClauses, wrapper.ConstraintClauses); // This is a struct, so we can't use Same()
Assert.Same(syntaxNode.Body, wrapper.Body);
Assert.Same(syntaxNode.ExpressionBody, wrapper.ExpressionBody);
Assert.True(syntaxNode.SemicolonToken.IsEquivalentTo(wrapper.SemicolonToken));
var newModifiers = SyntaxFactory.TokenList();
var wrapperWithModifiedModifiers = wrapper.WithModifiers(newModifiers);
Assert.NotNull(wrapperWithModifiedModifiers.SyntaxNode);
Assert.NotEqual(syntaxNode.Modifiers, wrapperWithModifiedModifiers.Modifiers);
Assert.Equal(0, wrapperWithModifiedModifiers.Modifiers.Count);
var newReturnType = SyntaxFactory.PredefinedType(SyntaxFactory.Token(SyntaxKind.BoolKeyword));
var wrapperWithModifiedReturnType = wrapper.WithReturnType(newReturnType);
Assert.NotNull(wrapperWithModifiedReturnType.SyntaxNode);
Assert.NotSame(syntaxNode.ReturnType, wrapperWithModifiedReturnType.ReturnType);
Assert.Equal(SyntaxKind.PredefinedType, wrapperWithModifiedReturnType.ReturnType.Kind());
var newIdentifier = SyntaxFactory.Identifier("NewIdentifier");
var wrapperWithModifiedIdentifier = wrapper.WithIdentifier(newIdentifier);
Assert.NotNull(wrapperWithModifiedIdentifier.SyntaxNode);
Assert.NotEqual(syntaxNode.Identifier, wrapperWithModifiedIdentifier.Identifier);
Assert.Equal(SyntaxKind.IdentifierToken, wrapperWithModifiedIdentifier.Identifier.Kind());
Assert.Equal("NewIdentifier", wrapperWithModifiedIdentifier.Identifier.Text);
var newTypeParameterList = SyntaxFactory.TypeParameterList();
var wrapperWithModifiedTypeParameterList = wrapper.WithTypeParameterList(newTypeParameterList);
Assert.NotNull(wrapperWithModifiedTypeParameterList.SyntaxNode);
Assert.NotSame(syntaxNode.TypeParameterList, wrapperWithModifiedTypeParameterList.TypeParameterList);
Assert.Equal(0, wrapperWithModifiedTypeParameterList.TypeParameterList.Parameters.Count);
var newParameterList = SyntaxFactory.ParameterList();
var wrapperWithModifiedParameterList = wrapper.WithParameterList(newParameterList);
Assert.NotNull(wrapperWithModifiedParameterList.SyntaxNode);
Assert.NotSame(syntaxNode.ParameterList, wrapperWithModifiedParameterList.ParameterList);
Assert.Equal(0, wrapperWithModifiedParameterList.ParameterList.Parameters.Count);
var newConstraintClauses = SyntaxFactory.List <TypeParameterConstraintClauseSyntax>();
var wrapperWithModifiedConstraintClauses = wrapper.WithConstraintClauses(newConstraintClauses);
Assert.NotNull(wrapperWithModifiedConstraintClauses.SyntaxNode);
Assert.NotEqual(syntaxNode.ConstraintClauses, wrapperWithModifiedConstraintClauses.ConstraintClauses);
Assert.Equal(0, wrapperWithModifiedConstraintClauses.ConstraintClauses.Count);
var newBody = SyntaxFactory.Block();
var wrapperWithModifiedBody = wrapper.WithBody(newBody);
Assert.NotNull(wrapperWithModifiedBody.SyntaxNode);
Assert.Equal(SyntaxKind.Block, wrapperWithModifiedBody.Body.Kind());
Assert.Equal(0, wrapperWithModifiedBody.Body.Statements.Count);
var newExpressionBody = SyntaxFactory.ArrowExpressionClause(SyntaxFactory.LiteralExpression(SyntaxKind.NullLiteralExpression));
var wrapperWithModifiedExpressionBody = wrapper.WithExpressionBody(newExpressionBody);
Assert.NotNull(wrapperWithModifiedExpressionBody.SyntaxNode);
Assert.Equal(SyntaxKind.ArrowExpressionClause, wrapperWithModifiedExpressionBody.ExpressionBody.Kind());
Assert.Equal(SyntaxKind.NullLiteralExpression, wrapperWithModifiedExpressionBody.ExpressionBody.Expression.Kind());
var newSemicolonToken = SyntaxFactory.Token(SyntaxKind.SemicolonToken).WithLeadingTrivia(SyntaxFactory.Space);
var wrapperWithModifiedSemicolonToken = wrapper.WithSemicolonToken(newSemicolonToken);
Assert.NotNull(wrapperWithModifiedSemicolonToken.SyntaxNode);
Assert.Equal(1, wrapperWithModifiedSemicolonToken.SemicolonToken.LeadingTrivia.Count);
Assert.Equal(" ", wrapperWithModifiedSemicolonToken.SemicolonToken.LeadingTrivia.ToString());
var addedModifiers = new SyntaxToken[] { SyntaxFactory.Token(SyntaxKind.AsyncKeyword) };
var wrapperWithAddedModifiers = wrapper.AddModifiers(addedModifiers);
Assert.NotNull(wrapperWithAddedModifiers.SyntaxNode);
Assert.NotEqual(syntaxNode.Modifiers, wrapperWithAddedModifiers.Modifiers);
Assert.Equal(2, wrapperWithAddedModifiers.Modifiers.Count);
Assert.Equal(SyntaxKind.PrivateKeyword, wrapperWithAddedModifiers.Modifiers[0].Kind());
Assert.Equal(SyntaxKind.AsyncKeyword, wrapperWithAddedModifiers.Modifiers[1].Kind());
var addedTypeParameterList = new TypeParameterSyntax[] { SyntaxFactory.TypeParameter("T2") };
var wrapperWithAddedTypeParameterList = wrapper.AddTypeParameterListParameters(addedTypeParameterList);
Assert.NotNull(wrapperWithAddedTypeParameterList.SyntaxNode);
Assert.NotSame(syntaxNode.TypeParameterList, wrapperWithAddedTypeParameterList.TypeParameterList);
Assert.Equal(2, wrapperWithAddedTypeParameterList.TypeParameterList.Parameters.Count);
Assert.Equal("T1", wrapperWithAddedTypeParameterList.TypeParameterList.Parameters[0].Identifier.Text);
Assert.Equal("T2", wrapperWithAddedTypeParameterList.TypeParameterList.Parameters[1].Identifier.Text);
var addedParameterList = new ParameterSyntax[] { SyntaxFactory.Parameter(SyntaxFactory.Identifier("param2")) };
var wrapperWithAddedParameterList = wrapper.AddParameterListParameters(addedParameterList);
Assert.NotNull(wrapperWithAddedParameterList.SyntaxNode);
Assert.NotSame(syntaxNode.ParameterList, wrapperWithAddedParameterList.ParameterList);
Assert.Equal(2, wrapperWithAddedParameterList.ParameterList.Parameters.Count);
Assert.Equal("param1", wrapperWithAddedParameterList.ParameterList.Parameters[0].Identifier.Text);
Assert.Equal("param2", wrapperWithAddedParameterList.ParameterList.Parameters[1].Identifier.Text);
var addedConstraintClauses = new TypeParameterConstraintClauseSyntax[] { SyntaxFactory.TypeParameterConstraintClause(SyntaxFactory.IdentifierName("constraint2")) };
var wrapperWithAddedConstraintClauses = wrapper.AddConstraintClauses(addedConstraintClauses);
Assert.NotNull(wrapperWithAddedConstraintClauses.SyntaxNode);
Assert.NotEqual(syntaxNode.ConstraintClauses, wrapperWithAddedConstraintClauses.ConstraintClauses);
Assert.Equal(2, wrapperWithAddedConstraintClauses.ConstraintClauses.Count);
Assert.Equal("constraint1", wrapperWithAddedConstraintClauses.ConstraintClauses[0].Name.Identifier.Text);
Assert.Equal("constraint2", wrapperWithAddedConstraintClauses.ConstraintClauses[1].Name.Identifier.Text);
var addedBodyStatements = new StatementSyntax[] { SyntaxFactory.ReturnStatement() };
var wrapperWithAddedBodyStatements = wrapper.AddBodyStatements(addedBodyStatements);
Assert.NotNull(wrapperWithAddedBodyStatements.SyntaxNode);
Assert.Equal(SyntaxKind.Block, wrapperWithAddedBodyStatements.Body.Kind());
Assert.Equal(2, wrapperWithAddedBodyStatements.Body.Statements.Count);
Assert.Equal(SyntaxKind.BreakStatement, wrapperWithAddedBodyStatements.Body.Statements[0].Kind());
Assert.Equal(SyntaxKind.ReturnStatement, wrapperWithAddedBodyStatements.Body.Statements[1].Kind());
}
private SyntaxNode GetNewBlock(SyntaxNode statement, StatementSyntax statementBody)
{
var body = SyntaxFactory.Block(statementBody);
return(statement.ReplaceNode(statementBody, body));
}
private static bool HasDescendantCSharpStatement(this StatementSyntax c)
{
return(c.DescendantNodes().OfType <StatementSyntax>().Any());
}
private static StatementSyntax RemoveOrComment(StatementSyntax member)
{
return(member.WithLeadingTrivia(RemoveOrComment(member.GetLeadingTrivia())));
}
private static bool IsThrowStatementWithoutExpression(StatementSyntax statement)
{
return((statement is ThrowStatementSyntax throwStatement) &&
throwStatement.Expression == null);
}
private static bool IsApprovedStatement(StatementSyntax statement)
{
return(!statement.IsAnyKind(ignoredStatementsInSwitch));
}
internal override bool TryGetSpeculativeSemanticModelCore(SyntaxTreeSemanticModel parentModel, int position, StatementSyntax statement, out SemanticModel speculativeModel)
{
position = CheckAndAdjustPosition(position);
var binder = this.GetEnclosingBinder(position);
if (binder == null)
{
speculativeModel = null;
return(false);
}
var methodSymbol = (MethodSymbol)this.MemberSymbol;
binder = new ExecutableCodeBinder(statement, methodSymbol, binder);
speculativeModel = CreateSpeculative(parentModel, methodSymbol, statement, binder, position);
return(true);
}
public static async Task ComputeRefactoringsAsync(RefactoringContext context, StatementListSelection selectedStatements)
{
if (selectedStatements.Count <= 1)
{
return;
}
StatementSyntax firstStatement = selectedStatements.First();
SemanticModel semanticModel = null;
ISymbol symbol = null;
ObjectCreationExpressionSyntax objectCreation = null;
SyntaxKind kind = firstStatement.Kind();
if (kind == SyntaxKind.LocalDeclarationStatement)
{
var localDeclaration = (LocalDeclarationStatementSyntax)firstStatement;
VariableDeclaratorSyntax variable = localDeclaration
.Declaration?
.Variables
.SingleOrDefault(shouldThrow: false);
objectCreation = variable?.Initializer?.Value as ObjectCreationExpressionSyntax;
if (objectCreation != null)
{
semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
symbol = semanticModel.GetDeclaredSymbol(variable, context.CancellationToken);
}
}
else if (kind == SyntaxKind.ExpressionStatement)
{
var expressionStatement = (ExpressionStatementSyntax)firstStatement;
if (expressionStatement.Expression is AssignmentExpressionSyntax assignment)
{
objectCreation = assignment.Right as ObjectCreationExpressionSyntax;
if (objectCreation != null)
{
semanticModel = await context.GetSemanticModelAsync().ConfigureAwait(false);
symbol = semanticModel.GetSymbol(assignment.Left, context.CancellationToken);
}
}
}
if (objectCreation == null)
{
return;
}
if (symbol?.IsErrorType() != false)
{
return;
}
for (int i = 1; i < selectedStatements.Count; i++)
{
if (!IsValidAssignmentStatement(selectedStatements[i], symbol, semanticModel, context.CancellationToken))
{
return;
}
}
context.RegisterRefactoring(
"Collapse to initializer",
ct => RefactorAsync(context.Document, objectCreation, selectedStatements, ct),
RefactoringIdentifiers.CollapseToInitializer);
}
public static LockStatementSyntax LockStatement(SyntaxToken lockKeyword, SyntaxToken openParenToken, ExpressionSyntax expression, SyntaxToken closeParenToken, StatementSyntax statement) => LockStatement(attributeLists: default, lockKeyword, openParenToken, expression, closeParenToken, statement);
private static void Analyze(SyntaxNodeAnalysisContext context, SyntaxToken token, StatementSyntax statement)
{
if (!token.IsKind(SyntaxKind.None) &&
!token.IsMissing &&
statement?.IsKind(SyntaxKind.Block, SyntaxKind.EmptyStatement) == false &&
context.SyntaxTree().IsSingleLineSpan(TextSpan.FromBounds(token.SpanStart, statement.SpanStart)))
{
ReportDiagnostic(context, statement);
}
}
public static LabeledStatementSyntax LabeledStatement(
SyntaxToken identifier,
SyntaxToken colonToken,
StatementSyntax statement
) => LabeledStatement(attributeLists: default, identifier, colonToken, statement);
public UsingStatementSyntax Update(SyntaxToken usingKeyword, SyntaxToken openParenToken, VariableDeclarationSyntax declaration, ExpressionSyntax expression, SyntaxToken closeParenToken, StatementSyntax statement)
{
return(Update(awaitKeyword: default, usingKeyword, openParenToken, declaration, expression, closeParenToken, statement));
public AwaitFinallyFrame(AwaitFinallyFrame parent, HashSet <LabelSymbol> labelsOpt, StatementSyntax statementSyntax)
{
Debug.Assert(parent != null);
Debug.Assert(statementSyntax != null);
Debug.Assert(statementSyntax.Kind() == SyntaxKind.TryStatement ||
(statementSyntax.Kind() == SyntaxKind.UsingStatement && ((UsingStatementSyntax)statementSyntax).AwaitKeyword != default) ||
(statementSyntax.Kind() == SyntaxKind.ForEachStatement && ((CommonForEachStatementSyntax)statementSyntax).AwaitKeyword != default) ||
(statementSyntax.Kind() == SyntaxKind.ForEachVariableStatement && ((CommonForEachStatementSyntax)statementSyntax).AwaitKeyword != default));
this.ParentOpt = parent;
this.LabelsOpt = labelsOpt;
_statementSyntaxOpt = statementSyntax;
}
public static void AnalyzeWhileStatement(SyntaxNodeAnalysisContext context)
{
var whileStatement = (WhileStatementSyntax)context.Node;
ExpressionSyntax condition = whileStatement.Condition;
if (condition.IsMissing)
{
return;
}
if (!condition.IsSingleLine())
{
return;
}
StatementSyntax statement = whileStatement.Statement;
if (!statement.IsKind(SyntaxKind.Block))
{
return;
}
var block = (BlockSyntax)statement;
SyntaxList <StatementSyntax> innerStatements = block.Statements;
if (innerStatements.Count <= 1)
{
return;
}
ExpressionSyntax incrementedExpression = GetIncrementedExpression(innerStatements.Last());
if (!incrementedExpression.IsKind(SyntaxKind.IdentifierName))
{
return;
}
SyntaxList <StatementSyntax> outerStatements = SyntaxInfo.StatementListInfo(whileStatement).Statements;
int index = outerStatements.IndexOf(whileStatement);
if (index <= 0)
{
return;
}
SingleLocalDeclarationStatementInfo localInfo = GetLocalInfo(outerStatements[index - 1]);
if (!localInfo.Success)
{
return;
}
if (index > 1)
{
SingleLocalDeclarationStatementInfo localInfo2 = GetLocalInfo(outerStatements[index - 2]);
if (localInfo2.Success)
{
ExpressionSyntax incrementedExpression2 = GetIncrementedExpression(innerStatements[innerStatements.Count - 2]);
if (incrementedExpression2.IsKind(SyntaxKind.IdentifierName))
{
var identifierName2 = (IdentifierNameSyntax)incrementedExpression2;
if (string.Equals(localInfo2.Identifier.ValueText, identifierName2.Identifier.ValueText, StringComparison.Ordinal))
{
return;
}
}
}
}
var identifierName = (IdentifierNameSyntax)incrementedExpression;
if (!string.Equals(localInfo.Identifier.ValueText, identifierName.Identifier.ValueText, StringComparison.Ordinal))
{
return;
}
if (ContainsContinueStatement())
{
return;
}
SemanticModel semanticModel = context.SemanticModel;
CancellationToken cancellationToken = context.CancellationToken;
ISymbol symbol = semanticModel.GetDeclaredSymbol(localInfo.Declarator, cancellationToken);
if (symbol?.Kind != SymbolKind.Local)
{
return;
}
if (IsLocalVariableReferencedAfterWhileStatement())
{
return;
}
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.UseForStatementInsteadOfWhileStatement, whileStatement.WhileKeyword);
bool ContainsContinueStatement()
{
ContainsContinueStatementWalker walker = ContainsContinueStatementWalker.GetInstance();
bool containsContinueStatement = false;
foreach (StatementSyntax innerStatement in innerStatements)
{
walker.Visit(innerStatement);
if (walker.ContainsContinueStatement)
{
containsContinueStatement = true;
break;
}
}
ContainsContinueStatementWalker.Free(walker);
return(containsContinueStatement);
}
bool IsLocalVariableReferencedAfterWhileStatement()
{
ContainsLocalOrParameterReferenceWalker walker = ContainsLocalOrParameterReferenceWalker.GetInstance(symbol, semanticModel, cancellationToken);
walker.VisitList(outerStatements, index + 1);
return(ContainsLocalOrParameterReferenceWalker.GetResultAndFree(walker));
}
}
public override IfStatementSyntax SetStatement(IfStatementSyntax statement, StatementSyntax newStatement)
{
return(statement.WithStatement(newStatement));
}
private static SingleLocalDeclarationStatementInfo GetLocalInfo(StatementSyntax statement)
{
return((statement.IsKind(SyntaxKind.LocalDeclarationStatement))
? SyntaxInfo.SingleLocalDeclarationStatementInfo((LocalDeclarationStatementSyntax)statement)
: default);
protected override StatementSyntax GetOrDeclareEntityArray(RoslynEcsTranslator.IterationContext iterationContext, out StatementSyntax arrayDisposal)
{
arrayDisposal = ExpressionStatement(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
IdentifierName(iterationContext.EntitiesArrayName),
IdentifierName(nameof(IDisposable.Dispose)))))
.NormalizeWhitespace();
return(RoslynBuilder.DeclareLocalVariable(
typeof(NativeArray <Entity>),
iterationContext.EntitiesArrayName,
ForEachContext.MakeInitEntityArray(iterationContext),
RoslynBuilder.VariableDeclarationType.InferredType));
}
/// <summary>
/// コンストラクタ
/// </summary>
/// <param name="method">メソッドインスタンス</param>
/// <param name="statement">構文インスタンス</param>
public BaseStatement(IMethod method, StatementSyntax statement)
{
MethodInstance = method;
Statement = statement;
}
public ForEachStatementSyntax Update(SyntaxToken forEachKeyword, SyntaxToken openParenToken, TypeSyntax type, SyntaxToken identifier, SyntaxToken inKeyword, ExpressionSyntax expression, SyntaxToken closeParenToken, StatementSyntax statement)
{
return(Update(awaitKeyword: default, forEachKeyword, openParenToken, type, identifier, inKeyword, expression, closeParenToken, statement));
internal void BuildLocals(Binder enclosingBinder, StatementSyntax statement, ArrayBuilder <LocalSymbol> locals)
{
var innerStatement = statement;
// drill into any LabeledStatements -- atomic LabelStatements have been bound into
// wrapped LabeledStatements by this point
while (innerStatement.Kind() == SyntaxKind.LabeledStatement)
{
innerStatement = ((LabeledStatementSyntax)innerStatement).Statement;
}
switch (innerStatement.Kind())
{
case SyntaxKind.LocalDeclarationStatement:
{
Binder localDeclarationBinder = enclosingBinder.GetBinder(innerStatement) ?? enclosingBinder;
var decl = (LocalDeclarationStatementSyntax)innerStatement;
decl.Declaration.Type.VisitRankSpecifiers((rankSpecifier, args) =>
{
foreach (var expression in rankSpecifier.Sizes)
{
if (expression.Kind() != SyntaxKind.OmittedArraySizeExpression)
{
ExpressionVariableFinder.FindExpressionVariables(args.localScopeBinder, args.locals, expression, args.localDeclarationBinder);
}
}
}, (localScopeBinder: this, locals: locals, localDeclarationBinder: localDeclarationBinder));
LocalDeclarationKind kind;
if (decl.IsConst)
{
kind = LocalDeclarationKind.Constant;
}
else if (decl.UsingKeyword != default(SyntaxToken))
{
kind = LocalDeclarationKind.UsingVariable;
}
else
{
kind = LocalDeclarationKind.RegularVariable;
}
foreach (var vdecl in decl.Declaration.Variables)
{
var localSymbol = MakeLocal(decl.Declaration, vdecl, kind, localDeclarationBinder);
locals.Add(localSymbol);
// also gather expression-declared variables from the bracketed argument lists and the initializers
ExpressionVariableFinder.FindExpressionVariables(this, locals, vdecl, localDeclarationBinder);
}
}
break;
case SyntaxKind.ExpressionStatement:
case SyntaxKind.IfStatement:
case SyntaxKind.YieldReturnStatement:
case SyntaxKind.ReturnStatement:
case SyntaxKind.ThrowStatement:
case SyntaxKind.GotoCaseStatement:
ExpressionVariableFinder.FindExpressionVariables(this, locals, innerStatement, enclosingBinder.GetBinder(innerStatement) ?? enclosingBinder);
break;
case SyntaxKind.SwitchStatement:
var switchStatement = (SwitchStatementSyntax)innerStatement;
ExpressionVariableFinder.FindExpressionVariables(this, locals, innerStatement, enclosingBinder.GetBinder(switchStatement.Expression) ?? enclosingBinder);
break;
case SyntaxKind.LockStatement:
Binder statementBinder = enclosingBinder.GetBinder(innerStatement);
Debug.Assert(statementBinder != null); // Lock always has a binder.
ExpressionVariableFinder.FindExpressionVariables(this, locals, innerStatement, statementBinder);
break;
default:
// no other statement introduces local variables into the enclosing scope
break;
}
}
public LabeledStatementSyntax Update(
SyntaxToken identifier,
SyntaxToken colonToken,
StatementSyntax statement
) => Update(AttributeLists, identifier, colonToken, statement);
internal static SyntaxToken GetFirstExcludedToken(StatementSyntax statement)
{
Debug.Assert(statement != null);
switch (statement.Kind())
{
case SyntaxKind.Block:
return(((BlockSyntax)statement).CloseBraceToken);
case SyntaxKind.BreakStatement:
return(((BreakStatementSyntax)statement).SemicolonToken);
case SyntaxKind.CheckedStatement:
case SyntaxKind.UncheckedStatement:
return(((CheckedStatementSyntax)statement).Block.CloseBraceToken);
case SyntaxKind.ContinueStatement:
return(((ContinueStatementSyntax)statement).SemicolonToken);
case SyntaxKind.LocalDeclarationStatement:
return(((LocalDeclarationStatementSyntax)statement).SemicolonToken);
case SyntaxKind.DoStatement:
return(((DoStatementSyntax)statement).SemicolonToken);
case SyntaxKind.EmptyStatement:
return(((EmptyStatementSyntax)statement).SemicolonToken);
case SyntaxKind.ExpressionStatement:
return(((ExpressionStatementSyntax)statement).SemicolonToken);
case SyntaxKind.FixedStatement:
return(GetFirstExcludedToken(((FixedStatementSyntax)statement).Statement));
case SyntaxKind.ForEachStatement:
case SyntaxKind.ForEachVariableStatement:
return(GetFirstExcludedToken(
((CommonForEachStatementSyntax)statement).Statement
));
case SyntaxKind.ForStatement:
return(GetFirstExcludedToken(((ForStatementSyntax)statement).Statement));
case SyntaxKind.GotoDefaultStatement:
case SyntaxKind.GotoCaseStatement:
case SyntaxKind.GotoStatement:
return(((GotoStatementSyntax)statement).SemicolonToken);
case SyntaxKind.IfStatement:
IfStatementSyntax ifStmt = (IfStatementSyntax)statement;
ElseClauseSyntax? elseOpt = ifStmt.Else;
return(GetFirstExcludedToken(
elseOpt == null ? ifStmt.Statement : elseOpt.Statement
));
case SyntaxKind.LabeledStatement:
return(GetFirstExcludedToken(((LabeledStatementSyntax)statement).Statement));
case SyntaxKind.LockStatement:
return(GetFirstExcludedToken(((LockStatementSyntax)statement).Statement));
case SyntaxKind.ReturnStatement:
return(((ReturnStatementSyntax)statement).SemicolonToken);
case SyntaxKind.SwitchStatement:
return(((SwitchStatementSyntax)statement).CloseBraceToken);
case SyntaxKind.ThrowStatement:
return(((ThrowStatementSyntax)statement).SemicolonToken);
case SyntaxKind.TryStatement:
TryStatementSyntax tryStmt = (TryStatementSyntax)statement;
FinallyClauseSyntax?finallyClause = tryStmt.Finally;
if (finallyClause != null)
{
return(finallyClause.Block.CloseBraceToken);
}
CatchClauseSyntax?lastCatch = tryStmt.Catches.LastOrDefault();
if (lastCatch != null)
{
return(lastCatch.Block.CloseBraceToken);
}
return(tryStmt.Block.CloseBraceToken);
case SyntaxKind.UnsafeStatement:
return(((UnsafeStatementSyntax)statement).Block.CloseBraceToken);
case SyntaxKind.UsingStatement:
return(GetFirstExcludedToken(((UsingStatementSyntax)statement).Statement));
case SyntaxKind.WhileStatement:
return(GetFirstExcludedToken(((WhileStatementSyntax)statement).Statement));
case SyntaxKind.YieldReturnStatement:
case SyntaxKind.YieldBreakStatement:
return(((YieldStatementSyntax)statement).SemicolonToken);
case SyntaxKind.LocalFunctionStatement:
LocalFunctionStatementSyntax localFunctionStmt =
(LocalFunctionStatementSyntax)statement;
if (localFunctionStmt.Body != null)
{
return(GetFirstExcludedToken(localFunctionStmt.Body));
}
if (localFunctionStmt.SemicolonToken != default(SyntaxToken))
{
return(localFunctionStmt.SemicolonToken);
}
return(localFunctionStmt.ParameterList.GetLastToken());
default:
throw ExceptionUtilities.UnexpectedValue(statement.Kind());
}
}
private static LiteralExpressionSyntax GetBooleanLiteral(StatementSyntax statement)
{
return(GetBooleanLiteral(GetReturnStatement(statement)));
}
protected override StatementSyntax AddMissingEventBuffers(RoslynEcsTranslator.IterationContext iterationContext, StatementSyntax onPopContext)
{
BlockSyntax b = onPopContext is BlockSyntax bl ? bl : Block(onPopContext);
var before = new List <StatementSyntax>();
foreach (Type eventType in iterationContext.WrittenEventTypes)
{
// ClearEvents<EventType>.AddMissingBuffers(<target query>, EntityManager);
before.Add(ExpressionStatement(
InvocationExpression(
MemberAccessExpression(
SyntaxKind.SimpleMemberAccessExpression,
GenericName(
Identifier("EventSystem"))
.WithTypeArgumentList(
TypeArgumentList(
SingletonSeparatedList(
eventType.ToTypeSyntax()))),
IdentifierName("AddMissingBuffers")))
.WithArgumentList(
ArgumentList(
SeparatedList(
new ArgumentSyntax[]
{
Argument(IdentifierName("Entities")),
Argument(IdentifierName(SendEventTranslator.MakeMissingEventQueryName(iterationContext, eventType))),
Argument(IdentifierName("EntityManager"))
})))));
}
b = b.WithStatements(b.Statements.InsertRange(0, before));
return(b);
}
private static SyntaxToken GetFirstIncludedToken(StatementSyntax statement)
{
Debug.Assert(statement != null);
switch (statement.Kind())
{
case SyntaxKind.Block:
return(((BlockSyntax)statement).OpenBraceToken);
case SyntaxKind.BreakStatement:
return(((BreakStatementSyntax)statement).BreakKeyword);
case SyntaxKind.CheckedStatement:
case SyntaxKind.UncheckedStatement:
return(((CheckedStatementSyntax)statement).Keyword);
case SyntaxKind.ContinueStatement:
return(((ContinueStatementSyntax)statement).ContinueKeyword);
case SyntaxKind.ExpressionStatement:
case SyntaxKind.LocalDeclarationStatement:
return(statement.GetFirstToken());
case SyntaxKind.DoStatement:
return(((DoStatementSyntax)statement).DoKeyword);
case SyntaxKind.EmptyStatement:
return(default(SyntaxToken)); //The caller will have to check for this.
case SyntaxKind.FixedStatement:
return(((FixedStatementSyntax)statement).FixedKeyword);
case SyntaxKind.ForEachStatement:
case SyntaxKind.ForEachVariableStatement:
return(((CommonForEachStatementSyntax)statement).OpenParenToken.GetNextToken());
case SyntaxKind.ForStatement:
return(((ForStatementSyntax)statement).OpenParenToken.GetNextToken());
case SyntaxKind.GotoDefaultStatement:
case SyntaxKind.GotoCaseStatement:
case SyntaxKind.GotoStatement:
return(((GotoStatementSyntax)statement).GotoKeyword);
case SyntaxKind.IfStatement:
return(((IfStatementSyntax)statement).IfKeyword);
case SyntaxKind.LabeledStatement:
return(((LabeledStatementSyntax)statement).Identifier);
case SyntaxKind.LockStatement:
return(((LockStatementSyntax)statement).LockKeyword);
case SyntaxKind.ReturnStatement:
return(((ReturnStatementSyntax)statement).ReturnKeyword);
case SyntaxKind.SwitchStatement:
return(((SwitchStatementSyntax)statement).Expression.GetFirstToken());
case SyntaxKind.ThrowStatement:
return(((ThrowStatementSyntax)statement).ThrowKeyword);
case SyntaxKind.TryStatement:
return(((TryStatementSyntax)statement).TryKeyword);
case SyntaxKind.UnsafeStatement:
return(((UnsafeStatementSyntax)statement).UnsafeKeyword);
case SyntaxKind.UsingStatement:
return(((UsingStatementSyntax)statement).UsingKeyword);
case SyntaxKind.WhileStatement:
return(((WhileStatementSyntax)statement).WhileKeyword);
case SyntaxKind.YieldReturnStatement:
case SyntaxKind.YieldBreakStatement:
return(((YieldStatementSyntax)statement).YieldKeyword);
case SyntaxKind.LocalFunctionStatement:
return(statement.GetFirstToken());
default:
throw ExceptionUtilities.UnexpectedValue(statement.Kind());
}
}
private static void ReportDiagnostic(SyntaxNodeAnalysisContext context, StatementSyntax statement)
{
context.ReportDiagnostic(
DiagnosticDescriptors.FormatEmbeddedStatementOnSeparateLine,
statement);
}
/// <summary>
/// Creates a speculative SemanticModel for a method body that did not appear in the original source code.
/// </summary>
internal static MethodBodySemanticModel CreateSpeculative(SyntaxTreeSemanticModel parentSemanticModel, MethodSymbol owner, StatementSyntax syntax, Binder rootBinder, int position)
{
Debug.Assert(parentSemanticModel != null);
Debug.Assert(syntax != null);
Debug.Assert(rootBinder != null);
Debug.Assert(rootBinder.IsSemanticModelBinder);
return(new MethodBodySemanticModel(owner, rootBinder, syntax, parentSemanticModelOpt: parentSemanticModel, speculatedPosition: position));
}