/// <summary>
/// Compiles a <see cref="UvssSelector"/> from the specified syntax node.
/// </summary>
private static UvssSelector CompileSelector(UvssSelectorBaseSyntax selector)
{
var parts = new List <UvssSelectorPart>();
var qualifier = UvssSelectorPartQualifier.None;
for (int i = 0; i < selector.Components.Count; i++)
{
var component = selector.Components[i];
switch (component.Kind)
{
case SyntaxKind.SelectorPart:
{
var part = CompileSelectorPart((UvssSelectorPartSyntax)component, qualifier);
parts.Add(part);
qualifier = UvssSelectorPartQualifier.None;
}
break;
case SyntaxKind.GreaterThanToken:
qualifier = UvssSelectorPartQualifier.VisualChild;
break;
case SyntaxKind.GreaterThanGreaterThanToken:
qualifier = UvssSelectorPartQualifier.TemplatedChild;
break;
case SyntaxKind.GreaterThanQuestionMarkToken:
qualifier = UvssSelectorPartQualifier.LogicalChild;
break;
}
}
return(new UvssSelector(parts));
}
/// <summary>
/// Adds a diagnostic indicating that a selector is invalid
/// to the specified collection of diagnostics.
/// </summary>
/// <param name="collection">The collection to which to add the diagnostic.</param>
/// <param name="node">The syntax node which is associated with the diagnostic.</param>
internal static void ReportInvalidSelector(ref ICollection <DiagnosticInfo> collection,
UvssSelectorBaseSyntax node)
{
Contract.Require(node, nameof(node));
var span = new TextSpan(0, node.Width);
var diagnostic = new DiagnosticInfo(node, DiagnosticID.InvalidSelector,
DiagnosticSeverity.Error, span, $"Invalid selector");
Report(ref collection, diagnostic);
}
