internal static async Task <ImmutableArray <SyntaxToken> > GetIdentifierOrGlobalNamespaceTokensWithTextAsync(
this Document document, SemanticModel model, string identifier, CancellationToken cancellationToken)
{
// It's very costly to walk an entire tree. So if the tree is simple and doesn't contain
// any unicode escapes in it, then we do simple string matching to find the tokens.
var info = await SyntaxTreeIndex.GetIndexAsync(document, cancellationToken).ConfigureAwait(false);
if (!info.ProbablyContainsIdentifier(identifier))
{
return(ImmutableArray <SyntaxToken> .Empty);
}
var syntaxFacts = document.GetLanguageService <ISyntaxFactsService>();
if (syntaxFacts == null)
{
return(ImmutableArray <SyntaxToken> .Empty);
}
var root = await model.SyntaxTree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var version = await document.GetSyntaxVersionAsync(cancellationToken).ConfigureAwait(false);
SourceText text = null;
if (!info.ProbablyContainsEscapedIdentifier(identifier))
{
text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
}
return(FindReferenceCache.GetIdentifierOrGlobalNamespaceTokensWithText(syntaxFacts, document, version, model, root, text, identifier, cancellationToken));
}
internal static async Task <IEnumerable <SyntaxToken> > GetIdentifierOrGlobalNamespaceTokensWithTextAsync(
this Document document, string identifier, CancellationToken cancellationToken)
{
// model should exist already
SemanticModel model;
if (!document.TryGetSemanticModel(out model))
{
return(Contract.FailWithReturn <IEnumerable <SyntaxToken> >("we should never reach here"));
}
// It's very costly to walk an entire tree. So if the tree is simple and doesn't contain
// any unicode escapes in it, then we do simple string matching to find the tokens.
var info = await SyntaxTreeInfo.GetIdentifierInfoAsync(document, cancellationToken).ConfigureAwait(false);
if (!info.ProbablyContainsIdentifier(identifier))
{
return(SpecializedCollections.EmptyEnumerable <SyntaxToken>());
}
var syntaxFacts = document.GetLanguageService <ISyntaxFactsService>();
if (syntaxFacts == null)
{
return(SpecializedCollections.EmptyEnumerable <SyntaxToken>());
}
var root = await model.SyntaxTree.GetRootAsync(cancellationToken).ConfigureAwait(false);
var version = await document.GetSyntaxVersionAsync(cancellationToken).ConfigureAwait(false);
SourceText text = null;
if (!info.ProbablyContainsEscapedIdentifier(identifier))
{
text = await document.GetTextAsync(cancellationToken).ConfigureAwait(false);
}
return(FindReferenceCache.GetIdentifierOrGlobalNamespaceTokensWithText(syntaxFacts, document, version, model, root, text, identifier, cancellationToken));
}