protected static void GatherDiagnostics(
SyntaxElement root,
List <Diagnostic> diagnostics,
DiagnosticsInclude include,
CancellationToken cancellationToken = default(CancellationToken))
{
cancellationToken.ThrowIfCancellationRequested();
bool includeSyntax = (include & DiagnosticsInclude.Syntactic) != 0;
bool includeSemantic = (include & DiagnosticsInclude.Semantic) != 0;
bool includeExpansion = (include & DiagnosticsInclude.Expansion) != 0;
var fnDescend = (include == DiagnosticsInclude.Syntactic)
? (Func <SyntaxElement, bool>)((SyntaxElement e) => e.ContainsSyntaxDiagnostics)
: null;
SyntaxElement.Walk(root,
fnBefore: element =>
{
if (element.HasSyntaxDiagnostics && includeSyntax)
{
// each syntax diagnostic is located at the element that carries it.
diagnostics.AddRange(element.SyntaxDiagnostics.Select(d => d.HasLocation ? d : SetLocation(d, element)));
}
if (includeSemantic && element is SyntaxNode node && node.SemanticDiagnostics.Count > 0)
{
diagnostics.AddRange(node.SemanticDiagnostics);
}
},
internal void InitializeTriviaStarts()
{
SyntaxElement.Walk(
this.Root,
fnBefore: element =>
{
System.Diagnostics.Debug.Assert(element.Parent == null || element.Parent._triviaStart >= 0);
element._triviaStart = (element.Parent?._triviaStart ?? 0) + element.OffsetInParent;
});
}
/// <summary>
/// Walks the entire syntax tree and evaluates the maximum depth of all the nodes.
/// </summary>
private static int ComputeMaxDepth(SyntaxElement root)
{
var maxDepth = 0;
var depth = 0;
SyntaxElement.Walk(
root,
fnBefore: e =>
{
depth++;
if (depth > maxDepth)
{
maxDepth = depth;
}
},
fnAfter: e => depth--);
return(maxDepth);
}
