public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
return;
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
VisitLambdaExpression(node);
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
VisitWithNesting(node, base.VisitSimpleLambdaExpression);
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
LambdaExpressionHandler(node);
base.VisitSimpleLambdaExpression(node);
}
public override SyntaxNode VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
return(node);
}
/*
* private MemberExpression GetExpressionMethod(string methodName, Type[] parameterTypes)
* {
* var method = project.FindMethod(typeof(System.Linq.Expressions.Expression).GetMethod(methodName, parameterTypes));
* return SkJs.EntityMethodToJsFunctionRef(method);
* }
*/
public override JsExpression VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
return(VisitLambdaExpression(node, new[] { node.Parameter }, node.Body));
}
public override object VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
Visit(node.Body);
return(null);
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
_tracker.AddIdentifier(node.Parameter.Identifier);
Visit(node.Body);
_tracker.RemoveIdentifier(node.Parameter.Identifier);
}
public static Lambda Create(ExpressionNodeInfo info, SimpleLambdaExpressionSyntax node) => new Lambda(info, node);
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
// don't walk lambda
}
Lambda(ExpressionNodeInfo info, SimpleLambdaExpressionSyntax node)
: this(info.SetKind(ExprKind.LAMBDA), node.Body, Enumerators.Singleton(node.Parameter))
{
}
public static bool TryFindMethodInvocation(
SyntaxNode containerNode,
ImmutableArray <string> methodNames,
Func <SimpleLambdaExpressionSyntax, bool> lambdaPredicate,
out InvocationExpressionSyntax invocation,
out SimpleLambdaExpressionSyntax methodArgument,
out int index)
{
invocation = null;
methodArgument = null;
index = -1;
bool isFound = false;
foreach (var node in containerNode.DescendantNodes())
{
if (!node.IsKind(SyntaxKind.InvocationExpression))
{
continue;
}
var currentInvocation = (InvocationExpressionSyntax)node;
if (!currentInvocation.Expression.IsKind(SyntaxKind.SimpleMemberAccessExpression))
{
continue;
}
var memberAccess = (MemberAccessExpressionSyntax)currentInvocation.Expression;
index = methodNames.IndexOf(memberAccess.Name.Identifier.Text);
if (index == -1)
{
continue;
}
if (currentInvocation.ArgumentList.Arguments.Count != 1)
{
continue;
}
var argument = currentInvocation.ArgumentList.Arguments[0];
if (!argument.Expression.IsKind(SyntaxKind.SimpleLambdaExpression))
{
continue;
}
var lambda = (SimpleLambdaExpressionSyntax)argument.Expression;
if (!lambdaPredicate(lambda))
{
continue;
}
invocation = currentInvocation;
methodArgument = lambda;
isFound = true;
break;
}
return(isFound);
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node) => OnlyOnParent(node, () => base.VisitSimpleLambdaExpression(node));
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
Emit <SimpleLambdaExpressionBlock, SimpleLambdaExpressionSyntax>(node);
}
private SyntaxNode FixSimpleLambda(SimpleLambdaExpressionSyntax lambda)
{
return(lambda.WithAsyncKeyword(default(SyntaxToken)).WithPrependedLeadingTrivia(lambda.AsyncKeyword.LeadingTrivia));
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
Visit(node.Body);
//base.VisitSimpleLambdaExpression(node);
}
private static TypeSyntax GetCastType(SimpleLambdaExpressionSyntax lambda)
{
return(lambda?.Body?.As <CastExpressionSyntax>()?.Type);
}
public override SyntaxNode VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
node = (SimpleLambdaExpressionSyntax)base.VisitSimpleLambdaExpression(node);
Classes.Add(node);
return(node);
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
hasLambdasWithClosedVariables = hasLambdasWithClosedVariables || LambdaClosedVariablesChecker.HasClosedVariables(node);
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
// ignore lambdas
}
public override LuaSyntaxNode VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
return(VisitLambdaExpression(new ParameterSyntax[] { node.Parameter }, node.Body));
}
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
_anonymousFunctionDepth++;
base.VisitSimpleLambdaExpression(node);
_anonymousFunctionDepth--;
}
public override TypeSyntax VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node) => GetInferredReturnTypeOfAnonymousFunctionSyntax(node);
public override void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
throw new NotImplementedException();
}
public override SyntaxNode VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
FilterAndInstrument(node.Body);
return(base.VisitSimpleLambdaExpression(node));
}
public static async Task <Document> RefactorAsync(
Document document,
ConditionalAccessExpressionSyntax conditionalAccess,
CancellationToken cancellationToken)
{
ExpressionSyntax expression = conditionalAccess.Expression;
SemanticModel semanticModel = await document.GetSemanticModelAsync().ConfigureAwait(false);
int position = conditionalAccess.SpanStart;
string localName = NameGenerator.Default.EnsureUniqueLocalName(DefaultNames.Variable, semanticModel, position);
ITypeSymbol typeSymbol = semanticModel.GetTypeSymbol(expression, cancellationToken);
TypeSyntax type = (typeSymbol?.SupportsExplicitDeclaration() == true)
? typeSymbol.ToMinimalTypeSyntax(semanticModel, position)
: VarType();
LocalDeclarationStatementSyntax localStatement = LocalDeclarationStatement(
type,
Identifier(localName).WithRenameAnnotation(),
expression);
InvocationExpressionSyntax newExpression = CreateTaskFromResultExpression(document, conditionalAccess, semanticModel, cancellationToken);
IfStatementSyntax ifStatement = IfStatement(
CSharpSnippets.NotEqualsToNull(IdentifierName(localName)),
Block(ReturnStatement(conditionalAccess.RemoveOperatorToken())),
ElseClause(Block(ReturnStatement(newExpression))));
SyntaxList <StatementSyntax> statements = List(new StatementSyntax[] { localStatement, ifStatement });
SyntaxNode parent = conditionalAccess.Parent;
if (parent is ReturnStatementSyntax returnStatement)
{
statements = statements.WithTriviaFrom(returnStatement);
if (returnStatement.IsEmbedded())
{
return(await document.ReplaceNodeAsync(returnStatement, Block(statements), cancellationToken).ConfigureAwait(false));
}
else
{
return(await document.ReplaceNodeAsync(returnStatement, statements, cancellationToken).ConfigureAwait(false));
}
}
else if (parent is SimpleLambdaExpressionSyntax simpleLambda)
{
SimpleLambdaExpressionSyntax newNode = simpleLambda
.WithBody(Block(statements))
.WithFormatterAnnotation();
return(await document.ReplaceNodeAsync(simpleLambda, newNode, cancellationToken).ConfigureAwait(false));
}
else if (parent is ParenthesizedLambdaExpressionSyntax parenthesizedLambda)
{
ParenthesizedLambdaExpressionSyntax newNode = parenthesizedLambda
.WithBody(Block(statements))
.WithFormatterAnnotation();
return(await document.ReplaceNodeAsync(parenthesizedLambda, newNode, cancellationToken).ConfigureAwait(false));
}
else
{
var arrowExpressionClause = (ArrowExpressionClauseSyntax)parent;
SyntaxNode node = arrowExpressionClause.Parent;
SyntaxNode newNode = CreateNewNode(node).WithFormatterAnnotation();
return(await document.ReplaceNodeAsync(node, newNode, cancellationToken).ConfigureAwait(false));
}
SyntaxNode CreateNewNode(SyntaxNode node)
{
switch (node)
{
case MethodDeclarationSyntax methodDeclaration:
{
return(methodDeclaration
.WithExpressionBody(null)
.WithBody(Block(statements)));
}
case LocalFunctionStatementSyntax localFunction:
{
return(localFunction
.WithExpressionBody(null)
.WithBody(Block(statements)));
}
case PropertyDeclarationSyntax propertyDeclaration:
{
return(propertyDeclaration
.WithExpressionBody(null)
.WithSemicolonToken(default(SyntaxToken))
.WithAccessorList(AccessorList(GetAccessorDeclaration(Block(statements)))));
}
case IndexerDeclarationSyntax indexerDeclaration:
{
return(indexerDeclaration
.WithExpressionBody(null)
.WithSemicolonToken(default(SyntaxToken))
.WithAccessorList(AccessorList(GetAccessorDeclaration(Block(statements)))));
}
case AccessorDeclarationSyntax accessorDeclaration:
{
return(accessorDeclaration
.WithExpressionBody(null)
.WithSemicolonToken(default(SyntaxToken))
.WithBody(Block(statements)));
}
default:
{
Debug.Fail(node.Kind().ToString());
return(node);
}
}
}
}
public SimpleLambdaExpressionTranslation(SimpleLambdaExpressionSyntax syntax, SyntaxTranslation parent) : base(syntax, parent)
{
Body = syntax.Body.Get <CSharpSyntaxTranslation>(this);
Parameter = syntax.Parameter.Get <ParameterTranslation>(this);
}
internal static SyntaxNode WithoutAsyncModifier(SimpleLambdaExpressionSyntax lambda) => lambda.WithAsyncKeyword(default).WithPrependedLeadingTrivia(lambda.AsyncKeyword.LeadingTrivia);
private static async Task <Document> RefactorAsync(
Document document,
SyntaxNode node,
CancellationToken cancellationToken)
{
SemanticModel semanticModel = await document.GetSemanticModelAsync(cancellationToken).ConfigureAwait(false);
switch (node)
{
case MethodDeclarationSyntax methodDeclaration:
{
IMethodSymbol methodSymbol = semanticModel.GetDeclaredSymbol(methodDeclaration, cancellationToken);
UseAsyncAwaitRewriter rewriter = UseAsyncAwaitRewriter.Create(methodSymbol);
var newNode = (MethodDeclarationSyntax)rewriter.VisitMethodDeclaration(methodDeclaration);
newNode = ModifierList <MethodDeclarationSyntax> .Instance.Insert(newNode, SyntaxKind.AsyncKeyword);
return(await document.ReplaceNodeAsync(methodDeclaration, newNode, cancellationToken).ConfigureAwait(false));
}
case LocalFunctionStatementSyntax localFunction:
{
IMethodSymbol methodSymbol = semanticModel.GetDeclaredSymbol(localFunction, cancellationToken);
UseAsyncAwaitRewriter rewriter = UseAsyncAwaitRewriter.Create(methodSymbol);
var newBody = (BlockSyntax)rewriter.VisitBlock(localFunction.Body);
LocalFunctionStatementSyntax newNode = localFunction.WithBody(newBody);
newNode = ModifierList <LocalFunctionStatementSyntax> .Instance.Insert(newNode, SyntaxKind.AsyncKeyword);
return(await document.ReplaceNodeAsync(localFunction, newNode, cancellationToken).ConfigureAwait(false));
}
case SimpleLambdaExpressionSyntax lambda:
{
var methodSymbol = (IMethodSymbol)semanticModel.GetSymbol(lambda, cancellationToken);
UseAsyncAwaitRewriter rewriter = UseAsyncAwaitRewriter.Create(methodSymbol);
var newBody = (BlockSyntax)rewriter.VisitBlock((BlockSyntax)lambda.Body);
SimpleLambdaExpressionSyntax newNode = lambda
.WithBody(newBody)
.WithAsyncKeyword(Token(SyntaxKind.AsyncKeyword));
return(await document.ReplaceNodeAsync(lambda, newNode, cancellationToken).ConfigureAwait(false));
}
case ParenthesizedLambdaExpressionSyntax lambda:
{
var methodSymbol = (IMethodSymbol)semanticModel.GetSymbol(lambda, cancellationToken);
UseAsyncAwaitRewriter rewriter = UseAsyncAwaitRewriter.Create(methodSymbol);
var newBody = (BlockSyntax)rewriter.VisitBlock((BlockSyntax)lambda.Body);
ParenthesizedLambdaExpressionSyntax newNode = lambda
.WithBody(newBody)
.WithAsyncKeyword(Token(SyntaxKind.AsyncKeyword));
return(await document.ReplaceNodeAsync(lambda, newNode, cancellationToken).ConfigureAwait(false));
}
case AnonymousMethodExpressionSyntax anonymousMethod:
{
var methodSymbol = (IMethodSymbol)semanticModel.GetSymbol(anonymousMethod, cancellationToken);
UseAsyncAwaitRewriter rewriter = UseAsyncAwaitRewriter.Create(methodSymbol);
var newBody = (BlockSyntax)rewriter.VisitBlock((BlockSyntax)anonymousMethod.Body);
AnonymousMethodExpressionSyntax newNode = anonymousMethod
.WithBody(newBody)
.WithAsyncKeyword(Token(SyntaxKind.AsyncKeyword));
return(await document.ReplaceNodeAsync(anonymousMethod, newNode, cancellationToken).ConfigureAwait(false));
}
}
throw new InvalidOperationException();
}
private SyntaxNode FixSimpleLambda(SimpleLambdaExpressionSyntax lambda)
{
return(lambda.WithoutLeadingTrivia()
.WithAsyncKeyword(s_asyncToken.WithPrependedLeadingTrivia(lambda.GetLeadingTrivia())));
}
public void VisitSimpleLambdaExpression(SimpleLambdaExpressionSyntax node)
{
if (node == null)
throw new ArgumentNullException("node");
node.Validate();
ExpressionStart(node);
if (node.Modifiers != Modifiers.None)
{
_writer.WriteModifiers(node.Modifiers);
_writer.WriteSpace();
}
node.Parameter.Accept(this);
if (_writer.Configuration.Spaces.Other.AroundLambdaArrow)
_writer.WriteSpace();
_writer.WriteSyntax(Syntax.Arrow);
if (
_writer.Configuration.Spaces.Other.AroundLambdaArrow &&
!(node.Body is BlockSyntax)
)
_writer.WriteSpace();
_writer.PushBraceFormatting(_writer.Configuration.BracesLayout.Other, false);
node.Body.Accept(this);
_writer.PopBraceFormatting();
ExpressionEnd(node);
}
