private static void HandleAttribute(SyntaxNodeAnalysisContext context)
{
var attribute = (AttributeSyntax)context.Node;
AttributeArgumentListSyntax argumentListSyntax = attribute.ArgumentList;
if (argumentListSyntax == null)
{
return;
}
SeparatedSyntaxList <AttributeArgumentSyntax> arguments = argumentListSyntax.Arguments;
if (arguments.Count < 3)
{
return;
}
AttributeArgumentSyntax previousParameter = arguments[1];
int firstParameterLine = arguments[0].GetLine();
int previousLine = previousParameter.GetLine();
Func <int, int, bool> lineCondition;
if (firstParameterLine == previousLine)
{
// arguments must be on same line
lineCondition = (param1Line, param2Line) => param1Line == param2Line;
}
else
{
// each argument must be on its own line
lineCondition = (param1Line, param2Line) => param1Line != param2Line;
}
for (int i = 2; i < arguments.Count; ++i)
{
AttributeArgumentSyntax currentParameter = arguments[i];
int currentLine = currentParameter.GetLine();
if (lineCondition(previousLine, currentLine))
{
previousLine = currentLine;
continue;
}
context.ReportDiagnostic(Diagnostic.Create(Descriptor, currentParameter.GetLocation()));
return;
}
}