private static void AnalyzeInvocationExpression(SyntaxNodeAnalysisContext context)
{
var invocation = (InvocationExpressionSyntax)context.Node;
if (invocation.ContainsDiagnostics)
{
return;
}
SimpleMemberInvocationExpressionInfo invocationInfo = SyntaxInfo.SimpleMemberInvocationExpressionInfo(invocation);
if (!invocationInfo.Success)
{
return;
}
string methodName = invocationInfo.NameText;
int argumentCount = invocationInfo.Arguments.Count;
switch (argumentCount)
{
case 0:
{
switch (methodName)
{
case "Any":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseCountOrLengthPropertyInsteadOfAnyMethod))
{
UseCountOrLengthPropertyInsteadOfAnyMethodAnalysis.Analyze(context, invocationInfo);
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeAny(context, invocationInfo);
}
break;
}
case "Cast":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhereAndCast(context, invocationInfo);
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.RemoveRedundantCast))
{
RemoveRedundantCastAnalyzer.Analyze(context, invocationInfo);
}
break;
}
case "Count":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall) &&
!OptimizeLinqMethodCallAnalysis.AnalyzeSelectManyAndCount(context, invocationInfo))
{
OptimizeLinqMethodCallAnalysis.AnalyzeCount(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
}
break;
}
case "First":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
if (CanUseElementAccess(context, invocationInfo) &&
UseElementAccessAnalysis.IsFixableFirst(invocationInfo, context.SemanticModel, context.CancellationToken))
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.UseElementAccess, Location.Create(invocation.SyntaxTree, TextSpan.FromBounds(invocationInfo.Name.SpanStart, invocationInfo.ArgumentList.Span.End)));
}
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeFirst(context, invocationInfo);
}
break;
}
case "Max":
case "Min":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
OptimizeLinqMethodCallAnalysis.AnalyzeSelectAndMinOrMax(context, invocationInfo);
}
break;
}
case "Reverse":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
OptimizeLinqMethodCallAnalysis.AnalyzeOrderByAndReverse(context, invocationInfo);
}
break;
}
case "ToString":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.RemoveRedundantToStringCall))
{
RemoveRedundantToStringCallAnalysis.Analyze(context, invocationInfo);
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseNameOfOperator) &&
((CSharpCompilation)context.Compilation).LanguageVersion >= LanguageVersion.CSharp6)
{
UseNameOfOperatorAnalyzer.Analyze(context, invocationInfo);
}
break;
}
case "ToLower":
case "ToLowerInvariant":
case "ToUpper":
case "ToUpperInvariant":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseStringComparison))
{
UseStringComparisonAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "FirstOrDefault":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeFirstOrDefault(context, invocationInfo);
}
break;
}
case "Last":
case "LastOrDefault":
case "LongCount":
case "Single":
case "SingleOrDefault":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
}
break;
}
case "OfType":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall) &&
!invocation.SpanContainsDirectives())
{
OptimizeLinqMethodCallAnalysis.AnalyzeOfType(context, invocationInfo);
}
break;
}
case "ToCharArray":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.RemoveRedundantStringToCharArrayCall))
{
RemoveRedundantStringToCharArrayCallAnalysis.Analyze(context, invocationInfo);
}
break;
}
}
break;
}
case 1:
{
switch (methodName)
{
case "All":
case "Any":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.SimplifyLogicalNegation))
{
SimplifyLogicalNegationAnalyzer.Analyze(context, invocationInfo);
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall) &&
!invocation.SpanContainsDirectives())
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhereAndAny(context, invocationInfo);
}
break;
}
case "ContainsKey":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeMethodCall))
{
OptimizeMethodCallAnalysis.OptimizeDictionaryContainsKey(context, invocationInfo);
}
break;
}
case "ElementAt":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall) &&
CanUseElementAccess(context, invocationInfo) &&
UseElementAccessAnalysis.IsFixableElementAt(invocationInfo, context.SemanticModel, context.CancellationToken))
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.UseElementAccess, Location.Create(invocation.SyntaxTree, TextSpan.FromBounds(invocationInfo.Name.SpanStart, invocationInfo.ArgumentList.Span.End)));
}
break;
}
case "FirstOrDefault":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
OptimizeLinqMethodCallAnalysis.AnalyzeFirstOrDefault(context, invocationInfo);
}
break;
}
case "GetValueOrDefault":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseCoalesceExpression) &&
invocationInfo.Name.IsKind(SyntaxKind.IdentifierName) &&
!invocation.IsParentKind(SyntaxKind.InvocationExpression, SyntaxKind.SimpleMemberAccessExpression, SyntaxKind.ElementAccessExpression) &&
context.SemanticModel
.GetMethodSymbol(invocationInfo.InvocationExpression, context.CancellationToken)?
.ContainingType
.OriginalDefinition
.SpecialType == SpecialType.System_Nullable_T)
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.UseCoalesceExpression, invocationInfo.Name);
}
break;
}
case "Where":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.CombineEnumerableWhereMethodChain))
{
CombineEnumerableWhereMethodChainAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "HasFlag":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.ConvertHasFlagCallToBitwiseOperationOrViceVersa) &&
context.IsAnalyzerSuppressed(AnalyzerOptions.ConvertBitwiseOperationToHasFlagCall) &&
!invocation.SpanContainsDirectives() &&
ConvertHasFlagCallToBitwiseOperationAnalysis.IsFixable(invocationInfo, context.SemanticModel, context.CancellationToken))
{
DiagnosticHelpers.ReportDiagnostic(
context,
DiagnosticDescriptors.ConvertHasFlagCallToBitwiseOperationOrViceVersa,
invocation);
}
break;
}
case "Select":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
CallCastInsteadOfSelectAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "OrderBy":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.CallThenByInsteadOfOrderBy))
{
CallThenByInsteadOfOrderByAnalysis.Analyze(context, invocationInfo);
}
break;
}
}
break;
}
case 2:
{
switch (invocationInfo.NameText)
{
case "IsMatch":
case "Match":
case "Matches":
case "Split":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseRegexInstanceInsteadOfStaticMethod) &&
!invocation.SpanContainsDirectives())
{
UseRegexInstanceInsteadOfStaticMethodAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "Select":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeLinqMethodCall))
{
CallCastInsteadOfSelectAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "OrderBy":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.CallThenByInsteadOfOrderBy))
{
CallThenByInsteadOfOrderByAnalysis.Analyze(context, invocationInfo);
}
break;
}
}
break;
}
case 3:
{
switch (invocationInfo.NameText)
{
case "IsMatch":
case "Match":
case "Matches":
case "Split":
case "Replace":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseRegexInstanceInsteadOfStaticMethod) &&
!invocation.SpanContainsDirectives())
{
UseRegexInstanceInsteadOfStaticMethodAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "OrderBy":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.CallThenByInsteadOfOrderBy))
{
CallThenByInsteadOfOrderByAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "Compare":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeMethodCall))
{
OptimizeMethodCallAnalysis.OptimizeStringCompare(context, invocationInfo);
}
break;
}
}
break;
}
case 4:
{
switch (invocationInfo.NameText)
{
case "Replace":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseRegexInstanceInsteadOfStaticMethod) &&
!invocation.SpanContainsDirectives())
{
UseRegexInstanceInsteadOfStaticMethodAnalysis.Analyze(context, invocationInfo);
}
break;
}
}
break;
}
}
switch (methodName)
{
case "ElementAtOrDefault":
case "FirstOrDefault":
case "LastOrDefault":
case "SingleOrDefault":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.AvoidNullReferenceException))
{
if (argumentCount == 0 ||
argumentCount == 1 ||
argumentCount == 2)
{
AvoidNullReferenceExceptionAnalyzer.Analyze(context, invocationInfo);
}
}
break;
}
case "Append":
case "AppendLine":
case "AppendFormat":
case "Insert":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeStringBuilderAppendCall))
{
OptimizeStringBuilderAppendCallAnalysis.Analyze(context, invocationInfo);
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.AvoidBoxingOfValueType))
{
AvoidBoxingOfValueTypeAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "Assert":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeMethodCall) &&
(argumentCount >= 1 && argumentCount <= 3))
{
OptimizeMethodCallAnalysis.OptimizeDebugAssert(context, invocationInfo);
}
break;
}
case "Join":
{
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.OptimizeMethodCall) &&
argumentCount >= 2)
{
OptimizeMethodCallAnalysis.OptimizeStringJoin(context, invocationInfo);
}
break;
}
}
if (!context.IsAnalyzerSuppressed(DiagnosticDescriptors.UseMethodChaining) &&
UseMethodChainingAnalysis.IsFixable(invocationInfo, context.SemanticModel, context.CancellationToken))
{
DiagnosticHelpers.ReportDiagnostic(context, DiagnosticDescriptors.UseMethodChaining, invocationInfo.InvocationExpression);
}
}
private static void AnalyzeInvocationExpression(SyntaxNodeAnalysisContext context)
{
var invocation = (InvocationExpressionSyntax)context.Node;
if (invocation.ContainsDiagnostics)
{
return;
}
SimpleMemberInvocationExpressionInfo invocationInfo = SyntaxInfo.SimpleMemberInvocationExpressionInfo(invocation);
if (!invocationInfo.Success)
{
return;
}
string methodName = invocationInfo.NameText;
int argumentCount = invocationInfo.Arguments.Count;
switch (argumentCount)
{
case 0:
{
switch (methodName)
{
case "Any":
{
UseCountOrLengthPropertyInsteadOfAnyMethodAnalysis.Analyze(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
break;
}
case "Cast":
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhereAndCast(context, invocationInfo);
RemoveRedundantCastAnalyzer.Analyze(context, invocationInfo);
break;
}
case "Count":
{
OptimizeLinqMethodCallAnalysis.AnalyzeCount(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
break;
}
case "First":
{
if (!invocationInfo.Expression.IsKind(SyntaxKind.InvocationExpression) &&
UseElementAccessAnalysis.IsFixableFirst(invocationInfo, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.OptimizeLinqMethodCall, Location.Create(invocation.SyntaxTree, TextSpan.FromBounds(invocationInfo.Name.SpanStart, invocationInfo.ArgumentList.Span.End)));
}
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeFirst(context, invocationInfo);
break;
}
case "ToString":
{
RemoveRedundantToStringCallAnalysis.Analyze(context, invocationInfo);
UseNameOfOperatorAnalyzer.Analyze(context, invocationInfo);
break;
}
case "ToLower":
case "ToLowerInvariant":
case "ToUpper":
case "ToUpperInvariant":
{
UseStringComparisonAnalysis.Analyze(context, invocationInfo);
break;
}
case "FirstOrDefault":
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
OptimizeLinqMethodCallAnalysis.AnalyzeFirstOrDefault(context, invocationInfo);
break;
}
case "Last":
case "LastOrDefault":
case "LongCount":
case "Single":
case "SingleOrDefault":
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhere(context, invocationInfo);
break;
}
case "OfType":
{
if (!invocation.SpanContainsDirectives())
{
OptimizeLinqMethodCallAnalysis.AnalyzeOfType(context, invocationInfo);
}
break;
}
case "ToCharArray":
{
RemoveRedundantStringToCharArrayCallAnalysis.Analyze(context, invocationInfo);
break;
}
}
break;
}
case 1:
{
switch (methodName)
{
case "All":
case "Any":
{
SimplifyLogicalNegationAnalyzer.Analyze(context, invocationInfo);
if (!invocation.SpanContainsDirectives())
{
OptimizeLinqMethodCallAnalysis.AnalyzeWhereAndAny(context, invocationInfo);
}
break;
}
case "ElementAt":
{
if (!invocationInfo.Expression.IsKind(SyntaxKind.InvocationExpression) &&
UseElementAccessAnalysis.IsFixableElementAt(invocationInfo, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.OptimizeLinqMethodCall, Location.Create(invocation.SyntaxTree, TextSpan.FromBounds(invocationInfo.Name.SpanStart, invocationInfo.ArgumentList.Span.End)));
}
break;
}
case "FirstOrDefault":
{
OptimizeLinqMethodCallAnalysis.AnalyzeFirstOrDefault(context, invocationInfo);
break;
}
case "Where":
{
CombineEnumerableWhereMethodChainAnalysis.Analyze(context, invocationInfo);
break;
}
case "HasFlag":
{
if (!invocation.SpanContainsDirectives() &&
UseBitwiseOperationInsteadOfCallingHasFlagAnalysis.IsFixable(invocationInfo, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.UseBitwiseOperationInsteadOfCallingHasFlag, invocation);
}
break;
}
case "Select":
{
CallCastInsteadOfSelectAnalysis.Analyze(context, invocationInfo);
break;
}
case "OrderBy":
{
CallThenByInsteadOfOrderByAnalysis.Analyze(context, invocationInfo);
break;
}
}
break;
}
case 2:
{
switch (invocationInfo.NameText)
{
case "IsMatch":
case "Match":
case "Matches":
case "Split":
{
if (!invocation.SpanContainsDirectives())
{
UseRegexInstanceInsteadOfStaticMethodAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "Select":
{
CallCastInsteadOfSelectAnalysis.Analyze(context, invocationInfo);
break;
}
case "OrderBy":
{
CallThenByInsteadOfOrderByAnalysis.Analyze(context, invocationInfo);
break;
}
}
break;
}
case 3:
{
switch (invocationInfo.NameText)
{
case "IsMatch":
case "Match":
case "Matches":
case "Split":
case "Replace":
{
if (!invocation.SpanContainsDirectives())
{
UseRegexInstanceInsteadOfStaticMethodAnalysis.Analyze(context, invocationInfo);
}
break;
}
case "OrderBy":
{
CallThenByInsteadOfOrderByAnalysis.Analyze(context, invocationInfo);
break;
}
}
break;
}
case 4:
{
switch (invocationInfo.NameText)
{
case "Replace":
{
if (!invocation.SpanContainsDirectives())
{
UseRegexInstanceInsteadOfStaticMethodAnalysis.Analyze(context, invocationInfo);
}
break;
}
}
break;
}
}
switch (methodName)
{
case "ElementAtOrDefault":
case "FirstOrDefault":
case "LastOrDefault":
{
if (argumentCount == 0 ||
argumentCount == 1 ||
argumentCount == 2)
{
AvoidNullReferenceExceptionAnalyzer.Analyze(context, invocationInfo);
}
break;
}
case "Append":
case "AppendLine":
case "AppendFormat":
case "Insert":
{
OptimizeStringBuilderAppendCallAnalysis.Analyze(context, invocationInfo);
break;
}
case "Join":
{
if (argumentCount >= 2)
{
CallStringConcatInsteadOfStringJoinAnalysis.Analyze(context, invocationInfo);
}
break;
}
}
if (UseMethodChainingAnalysis.IsFixable(invocationInfo, context.SemanticModel, context.CancellationToken))
{
context.ReportDiagnostic(DiagnosticDescriptors.UseMethodChaining, invocationInfo.InvocationExpression);
}
}