/**
* Check if ".Result" is accessed on a 'ValueTask'
* - ignore the call if it's called inside an 'if (valueTask.IsCompletedSuccessfully)'
*/
public override void VisitMemberAccessExpression(MemberAccessExpressionSyntax node)
{
if (node.IsPropertyInvocation(ValueTaskTypes, "Result", semanticModel) &&
GetLeftMostIdentifier(node) is IdentifierNameSyntax identifierName &&
this.semanticModel.GetSymbolInfo(identifierName).Symbol is ISymbol symbol &&
!VerifiedForSuccessfulCompletion.Contains(symbol))
{
AddToSymbolUsages(symbol, identifierName);
ConsumedButNotCompleted.Add(identifierName);
}
base.VisitMemberAccessExpression(node);
}
/**
* Check if it's the wanted method on a ValueTask
* - we treat AsTask() like await - always add it to the list
* - for GetAwaiter().GetResult() - ignore the call if it's called inside an 'if (valueTask.IsCompletedSuccessfully)'
*/
public override void VisitInvocationExpression(InvocationExpressionSyntax node)
{
if (node.Expression is MemberAccessExpressionSyntax memberAccess)
{
if (node.IsMethodInvocation(ValueTaskTypes, "AsTask", semanticModel) &&
GetLeftMostIdentifier(memberAccess) is IdentifierNameSyntax identifier1)
{
AddToSymbolUsages(this.semanticModel.GetSymbolInfo(identifier1).Symbol, identifier1);
}
if (node.IsMethodInvocation(ValueTaskTypes, "GetResult", semanticModel) &&
GetLeftMostIdentifier(memberAccess) is IdentifierNameSyntax identifier2 &&
this.semanticModel.GetSymbolInfo(identifier2).Symbol is ISymbol symbol2 &&
!VerifiedForSuccessfulCompletion.Contains(symbol2))
{
AddToSymbolUsages(symbol2, identifier2);
ConsumedButNotCompleted.Add(identifier2);
}
}
base.VisitInvocationExpression(node);
}