private bool TryParseCssValueComparison(RequiredAttributeDescriptorBuilder builder, out RequiredAttributeDescriptor.ValueComparisonMode valueComparison)
{
Debug.Assert(!AtEnd);
if (CssValueComparisons.TryGetValue(Current, out valueComparison))
{
var op = Current;
_index++;
if (op != '=' && At('='))
{
// Two length operator (ex: ^=). Move past the second piece
_index++;
}
else if (op != '=') // We're at an incomplete operator (ex: [foo^]
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_PartialRequiredAttributeOperator(op, _requiredAttributes);
builder.Diagnostics.Add(diagnostic);
return(false);
}
}
else if (!At(']'))
{
var diagnostic = RazorDiagnosticFactory.CreateTagHelper_InvalidRequiredAttributeOperator(Current, _requiredAttributes);
builder.Diagnostics.Add(diagnostic);
return(false);
}
builder.ValueComparisonMode = valueComparison;
return(true);
}
