private void AnalyzeInvocationExpression(SyntaxNodeAnalysisContext context)
{
var invocation = (InvocationExpressionSyntax)context.Node;
ExpressionSyntax expression = invocation.Expression;
if (expression?.IsKind(SyntaxKind.SimpleMemberAccessExpression) == true)
{
var memberAccess = (MemberAccessExpressionSyntax)expression;
ArgumentListSyntax argumentList = invocation.ArgumentList;
if (argumentList?.IsMissing == false)
{
int argumentCount = argumentList.Arguments.Count;
string methodName = memberAccess.Name?.Identifier.ValueText;
if (argumentCount == 0)
{
switch (methodName)
{
case "Any":
{
SimplifyLinqMethodChainRefactoring.Analyze(context, invocation, memberAccess, methodName);
UseCountOrLengthPropertyInsteadOfAnyMethodRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "Cast":
{
CallOfTypeInsteadOfWhereAndCastRefactoring.Analyze(context, invocation);
break;
}
case "Count":
{
SimplifyLinqMethodChainRefactoring.Analyze(context, invocation, memberAccess, methodName);
UseInsteadOfCountMethodRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "First":
case "FirstOrDefault":
case "Last":
case "LastOrDefault":
case "LongCount":
case "Single":
case "SingleOrDefault":
{
SimplifyLinqMethodChainRefactoring.Analyze(context, invocation, memberAccess, methodName);
break;
}
}
}
else if (argumentCount == 1)
{
switch (methodName)
{
case "FirstOrDefault":
{
CallFindInsteadOfFirstOrDefaultRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "Where":
{
CombineEnumerableWhereMethodChainRefactoring.Analyze(context, invocation, memberAccess);
break;
}
}
}
}
}
if (UseBitwiseOperationInsteadOfCallingHasFlagRefactoring.CanRefactor(invocation, context.SemanticModel, context.CancellationToken) &&
!invocation.SpanContainsDirectives())
{
context.ReportDiagnostic(DiagnosticDescriptors.UseBitwiseOperationInsteadOfCallingHasFlag, invocation);
}
RemoveRedundantStringToCharArrayCallRefactoring.Analyze(context, invocation);
CombineEnumerableWhereAndAnyRefactoring.AnalyzeInvocationExpression(context);
if (!invocation.ContainsDiagnostics)
{
if (!invocation.SpanContainsDirectives())
{
CallExtensionMethodAsInstanceMethodRefactoring.AnalysisResult result =
CallExtensionMethodAsInstanceMethodRefactoring.Analyze(invocation, context.SemanticModel, context.CancellationToken);
if (result.Success &&
context.SemanticModel
.GetEnclosingNamedType(result.InvocationExpression.SpanStart, context.CancellationToken)?
.Equals(result.MethodSymbol.ContainingType) == false)
{
context.ReportDiagnostic(DiagnosticDescriptors.CallExtensionMethodAsInstanceMethod, invocation);
}
}
MemberInvocationExpression memberInvocation;
if (MemberInvocationExpression.TryCreate(invocation, out memberInvocation))
{
if (!invocation.SpanContainsDirectives())
{
UseRegexInstanceInsteadOfStaticMethodRefactoring.Analyze(context, memberInvocation);
}
string methodName = memberInvocation.NameText;
AvoidNullReferenceExceptionRefactoring.Analyze(context, memberInvocation);
int argumentCount = memberInvocation.ArgumentList.Arguments.Count;
switch (argumentCount)
{
case 0:
{
switch (methodName)
{
case "First":
{
if (!memberInvocation.Expression.IsKind(SyntaxKind.InvocationExpression) &&
UseElementAccessInsteadOfFirstRefactoring.CanRefactor(memberInvocation, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.UseElementAccessInsteadOfFirst, memberInvocation.Name);
}
break;
}
case "ToString":
{
RemoveRedundantToStringCallRefactoring.Analyze(context, memberInvocation);
break;
}
}
break;
}
case 1:
{
switch (methodName)
{
case "ElementAt":
{
if (!memberInvocation.Expression.IsKind(SyntaxKind.InvocationExpression) &&
UseElementAccessInsteadOfElementAtRefactoring.CanRefactor(memberInvocation, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.UseElementAccessInsteadOfElementAt, memberInvocation.Name);
}
break;
}
}
break;
}
}
switch (methodName)
{
case "Append":
case "AppendLine":
case "AppendFormat":
case "Insert":
{
OptimizeStringBuilderAppendCallRefactoring.Analyze(context, memberInvocation);
break;
}
case "Select":
{
if (argumentCount == 1 ||
argumentCount == 2)
{
CallCastInsteadOfSelectRefactoring.Analyze(context, memberInvocation);
}
break;
}
case "OrderBy":
case "OrderByDescending":
{
if (argumentCount == 1 ||
argumentCount == 2 ||
argumentCount == 3)
{
CallThenByInsteadOfOrderByRefactoring.Analyze(context, memberInvocation);
}
break;
}
}
if (UseMethodChainingRefactoring.IsFixable(memberInvocation, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.UseMethodChaining, memberInvocation.InvocationExpression);
}
}
}
}
private void AnalyzeInvocationExpression(SyntaxNodeAnalysisContext context)
{
var invocation = (InvocationExpressionSyntax)context.Node;
ExpressionSyntax expression = invocation.Expression;
if (expression?.IsKind(SyntaxKind.SimpleMemberAccessExpression) == true)
{
var memberAccess = (MemberAccessExpressionSyntax)expression;
ArgumentListSyntax argumentList = invocation.ArgumentList;
if (argumentList?.IsMissing == false)
{
int argumentCount = argumentList.Arguments.Count;
string methodName = memberAccess.Name?.Identifier.ValueText;
if (argumentCount == 0)
{
switch (methodName)
{
case "Any":
{
SimplifyLinqMethodChainRefactoring.Analyze(context, invocation, memberAccess, methodName);
UseCountOrLengthPropertyInsteadOfAnyMethodRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "Cast":
{
CallOfTypeInsteadOfWhereAndCastRefactoring.Analyze(context, invocation);
break;
}
case "Count":
{
SimplifyLinqMethodChainRefactoring.Analyze(context, invocation, memberAccess, methodName);
UseInsteadOfCountMethodRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "First":
{
SimplifyLinqMethodChainRefactoring.Analyze(context, invocation, memberAccess, methodName);
UseElementAccessInsteadOfFirstRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "FirstOrDefault":
case "Last":
case "LastOrDefault":
case "LongCount":
case "Single":
case "SingleOrDefault":
{
SimplifyLinqMethodChainRefactoring.Analyze(context, invocation, memberAccess, methodName);
break;
}
}
}
else if (argumentCount == 1)
{
switch (methodName)
{
case "ElementAt":
{
UseElementAccessInsteadOfElementAtRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "FirstOrDefault":
{
CallFindMethodInsteadOfFirstOrDefaultMethodRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "Select":
{
UseCastMethodInsteadOfSelectMethodRefactoring.Analyze(context, invocation, memberAccess);
break;
}
case "Where":
{
CombineEnumerableWhereMethodChainRefactoring.Analyze(context, invocation, memberAccess);
break;
}
}
}
}
}
if (UseBitwiseOperationInsteadOfCallingHasFlagRefactoring.CanRefactor(invocation, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.UseBitwiseOperationInsteadOfCallingHasFlag, invocation);
}
RemoveRedundantToStringCallRefactoring.Analyze(context, invocation);
RemoveRedundantStringToCharArrayCallRefactoring.Analyze(context, invocation);
}