private static bool CheckSpeculativeSymbol(
AnonymousFunctionExpressionSyntax anonymousFunction,
ExpressionSyntax expression,
IMethodSymbol methodSymbol,
SemanticModel semanticModel)
{
SymbolInfo symbolInfo = semanticModel.GetSpeculativeSymbolInfo(anonymousFunction.SpanStart, expression, SpeculativeBindingOption.BindAsExpression);
ISymbol symbol = symbolInfo.Symbol;
if (symbol?.Equals(methodSymbol) == true)
return true;
ImmutableArray<ISymbol> candidateSymbols = symbolInfo.CandidateSymbols;
if (candidateSymbols.Any())
{
if (candidateSymbols.Length == 1)
{
if (candidateSymbols[0].Equals(methodSymbol))
return true;
}
else if (!anonymousFunction.WalkUpParentheses().IsParentKind(SyntaxKind.Argument, SyntaxKind.AttributeArgument))
{
foreach (ISymbol candidateSymbol in candidateSymbols)
{
if (candidateSymbol.Equals(methodSymbol))
return true;
}
}
}
return false;
}
private static bool CheckSpeculativeSymbol(
AnonymousFunctionExpressionSyntax anonymousFunction,
ExpressionSyntax expression,
IMethodSymbol methodSymbol,
SemanticModel semanticModel,
CancellationToken cancellationToken)
{
SyntaxNode argumentExpression = anonymousFunction.WalkUpParentheses();
if (argumentExpression.Parent is ArgumentSyntax argument)
{
if (argument.Parent is BaseArgumentListSyntax)
{
SyntaxNode node = argument.Parent.Parent;
// related to https://github.com/dotnet/roslyn/issues/25262
if (CSharpUtility.IsConditionallyAccessed(node))
{
return(false);
}
SyntaxNode newNode = node.ReplaceNode(argument.Expression, expression);
SymbolInfo symbolInfo = semanticModel.GetSpeculativeSymbolInfo(node.SpanStart, newNode, SpeculativeBindingOption.BindAsExpression);
methodSymbol = semanticModel.GetSymbol(node, cancellationToken) as IMethodSymbol;
return(methodSymbol != null &&
CheckSpeculativeSymbol(symbolInfo));
}
}
else
{
SymbolInfo symbolInfo = semanticModel.GetSpeculativeSymbolInfo(anonymousFunction.SpanStart, expression, SpeculativeBindingOption.BindAsExpression);
return(CheckSpeculativeSymbol(symbolInfo));
}
return(false);
bool CheckSpeculativeSymbol(SymbolInfo symbolInfo)
{
return(symbolInfo.Symbol?.Equals(methodSymbol) == true ||
symbolInfo.CandidateSymbols.SingleOrDefault(shouldThrow: false)?.Equals(methodSymbol) == true);
}
}
