private static ITypeSymbol GetSymbolForParentUsingTheLambda(LambdaExpressionSyntax syntax, IContext context)
{
var argListSyntax = syntax.Ancestors().OfType <ArgumentListSyntax>().FirstOrDefault();
if (argListSyntax != null)
{
var argument = syntax.Ancestors().OfType <ArgumentSyntax>().First();
var argNum = argListSyntax.ChildNodes().ToList().IndexOf(argument);
if (argListSyntax.Parent is InvocationExpressionSyntax)
{
var symbol =
(IMethodSymbol)
ModelExtensions.GetSymbolInfo(
context.SemanticModel,
(InvocationExpressionSyntax)argListSyntax.Parent).Symbol;
return(symbol.Parameters[argNum].Type);
}
else if (argListSyntax.Parent is ObjectCreationExpressionSyntax)
{
var symbol = (IMethodSymbol)context.SemanticModel.GetSymbolInfo(argListSyntax.Parent).Symbol;
if (symbol != null)
{
return(symbol.Parameters[argNum].Type);
}
var namedTypeSymbol =
(INamedTypeSymbol)
ModelExtensions.GetSymbolInfo(
context.SemanticModel,
((ObjectCreationExpressionSyntax)argListSyntax.Parent).Type).Symbol;
if (namedTypeSymbol.TypeKind == TypeKind.Delegate)
{
return(namedTypeSymbol);
}
throw new Exception($"Could not guess constructor for {namedTypeSymbol}.");
}
else
{
throw new NotImplementedException();
}
}
else
{
var assignment = syntax.Parent as AssignmentExpressionSyntax;
if (assignment != null)
{
var s = context.SemanticModel.GetSymbolInfo(assignment.Left).Symbol;
var propertySymbol = s as IPropertySymbol;
if (propertySymbol != null)
{
return(propertySymbol.Type);
}
var fieldSymbol = s as IFieldSymbol;
if (fieldSymbol != null)
{
return(fieldSymbol.Type);
}
throw new NotImplementedException();
}
throw new NotImplementedException();
}
}
