protected override async Task <ImmutableArray <ISymbol> > FindDeclarationsAsync(
SymbolFilter filter, SearchQuery searchQuery)
{
var declarations = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
_project, searchQuery, filter, CancellationToken).ConfigureAwait(false);
return(declarations.SelectAsArray(d => d.Symbol));
}
private async Task <ImmutableArray <SymbolResult> > GetMatchingTypesAsync(
Document document, SemanticModel semanticModel, SyntaxNode node, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var project = document.Project;
var syntaxFacts = project.LanguageServices.GetRequiredService <ISyntaxFactsService>();
syntaxFacts.GetNameAndArityOfSimpleName(node, out var name, out var arity);
var looksGeneric = syntaxFacts.LooksGeneric(node);
var symbols = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
project, SearchQuery.Create(name, IgnoreCase),
SymbolFilter.Type, cancellationToken).ConfigureAwait(false);
// also lookup type symbols with the "Attribute" suffix.
var inAttributeContext = syntaxFacts.IsAttributeName(node);
if (inAttributeContext)
{
var attributeSymbols = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
project, SearchQuery.Create(name + "Attribute", IgnoreCase),
SymbolFilter.Type, cancellationToken).ConfigureAwait(false);
symbols = symbols.Concat(attributeSymbols);
}
var options = await document.GetOptionsAsync(cancellationToken).ConfigureAwait(false);
var hideAdvancedMembers = options.GetOption(CompletionOptions.HideAdvancedMembers);
var editorBrowserInfo = new EditorBrowsableInfo(semanticModel.Compilation);
var validSymbols = symbols
.OfType <INamedTypeSymbol>()
.Where(s => IsValidNamedTypeSearchResult(semanticModel, arity, inAttributeContext, looksGeneric, s) &&
s.IsEditorBrowsable(hideAdvancedMembers, semanticModel.Compilation, editorBrowserInfo))
.ToImmutableArray();
// Check what the current node binds to. If it binds to any symbols, but with
// the wrong arity, then we don't want to suggest fully qualifying to the same
// type that we're already binding to. That won't address the WrongArity problem.
var currentSymbolInfo = semanticModel.GetSymbolInfo(node, cancellationToken);
if (currentSymbolInfo.CandidateReason == CandidateReason.WrongArity)
{
validSymbols = validSymbols.WhereAsArray(
s => !currentSymbolInfo.CandidateSymbols.Contains(s));
}
return(validSymbols.SelectAsArray(s => new SymbolResult(s, weight: TypeWeight)));
}
private async Task <ImmutableArray <SymbolResult> > GetMatchingNamespacesAsync(
Project project,
SemanticModel semanticModel,
SyntaxNode simpleName,
CancellationToken cancellationToken)
{
var syntaxFacts = project.LanguageServices.GetService <ISyntaxFactsService>();
if (syntaxFacts.IsAttributeName(simpleName))
{
return(ImmutableArray <SymbolResult> .Empty);
}
syntaxFacts.GetNameAndArityOfSimpleName(simpleName, out var name, out var arityUnused);
if (cancellationToken.IsCancellationRequested)
{
return(ImmutableArray <SymbolResult> .Empty);
}
var symbolAndProjectIds = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
project, SearchQuery.Create(name, IgnoreCase),
SymbolFilter.Namespace, cancellationToken).ConfigureAwait(false);
var symbols = symbolAndProjectIds.SelectAsArray(t => t.Symbol);
// There might be multiple namespaces that this name will resolve successfully in.
// Some of them may be 'better' results than others. For example, say you have
// Y.Z and Y exists in both X1 and X2
// We'll want to order them such that we prefer the namespace that will correctly
// bind Z off of Y as well.
string rightName = null;
var isAttributeName = false;
if (syntaxFacts.IsLeftSideOfDot(simpleName))
{
var rightSide = syntaxFacts.GetRightSideOfDot(simpleName.Parent);
syntaxFacts.GetNameAndArityOfSimpleName(rightSide, out rightName, out arityUnused);
isAttributeName = syntaxFacts.IsAttributeName(rightSide);
}
var namespaces = symbols
.OfType <INamespaceSymbol>()
.Where(n => !n.IsGlobalNamespace && HasAccessibleTypes(n, semanticModel, cancellationToken))
.Select(n => new SymbolResult(n,
BindsWithoutErrors(n, rightName, isAttributeName) ? NamespaceWithNoErrorsWeight : NamespaceWithErrorsWeight));
return(namespaces.ToImmutableArray());
}
private async Task <ImmutableArray <SymbolResult> > GetMatchingTypesAsync(
Project project, SemanticModel semanticModel, SyntaxNode node, CancellationToken cancellationToken)
{
cancellationToken.ThrowIfCancellationRequested();
var syntaxFacts = project.LanguageServices.GetService <ISyntaxFactsService>();
syntaxFacts.GetNameAndArityOfSimpleName(node, out var name, out var arity);
var symbolAndProjectIds = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
project, SearchQuery.Create(name, this.IgnoreCase),
SymbolFilter.Type, cancellationToken).ConfigureAwait(false);
var symbols = symbolAndProjectIds.SelectAsArray(t => t.Symbol);
// also lookup type symbols with the "Attribute" suffix.
var inAttributeContext = syntaxFacts.IsAttributeName(node);
if (inAttributeContext)
{
var attributeSymbolAndProjectIds = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
project, SearchQuery.Create(name + "Attribute", this.IgnoreCase),
SymbolFilter.Type, cancellationToken).ConfigureAwait(false);
symbols = symbols.Concat(attributeSymbolAndProjectIds.SelectAsArray(t => t.Symbol));
}
var validSymbols = symbols
.OfType <INamedTypeSymbol>()
.Where(s => IsValidNamedTypeSearchResult(semanticModel, arity, inAttributeContext, s))
.ToImmutableArray();
// Check what the current node binds to. If it binds to any symbols, but with
// the wrong arity, then we don't want to suggest fully qualifying to the same
// type that we're already binding to. That won't address the WrongArity problem.
var currentSymbolInfo = semanticModel.GetSymbolInfo(node, cancellationToken);
if (currentSymbolInfo.CandidateReason == CandidateReason.WrongArity)
{
validSymbols = validSymbols.WhereAsArray(
s => !currentSymbolInfo.CandidateSymbols.Contains(s));
}
return(validSymbols.SelectAsArray(s => new SymbolResult(s, weight: TypeWeight)));
}
private async Task <ImmutableArray <SymbolResult> > GetMatchingTypesAsync(
Project project, SemanticModel semanticModel, SyntaxNode node, CancellationToken cancellationToken)
{
// Can't be on the right hand side of binary expression (like 'dot').
cancellationToken.ThrowIfCancellationRequested();
var syntaxFacts = project.LanguageServices.GetService <ISyntaxFactsService>();
syntaxFacts.GetNameAndArityOfSimpleName(node, out var name, out var arity);
var symbolAndProjectIds = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
project, SearchQuery.Create(name, this.IgnoreCase),
SymbolFilter.Type, cancellationToken).ConfigureAwait(false);
var symbols = symbolAndProjectIds.SelectAsArray(t => t.Symbol);
// also lookup type symbols with the "Attribute" suffix.
var inAttributeContext = syntaxFacts.IsAttributeName(node);
if (inAttributeContext)
{
var attributeSymbolAndProjectIds = await DeclarationFinder.FindAllDeclarationsWithNormalQueryAsync(
project, SearchQuery.Create(name + "Attribute", this.IgnoreCase),
SymbolFilter.Type, cancellationToken).ConfigureAwait(false);
symbols = symbols.Concat(attributeSymbolAndProjectIds.SelectAsArray(t => t.Symbol));
}
var accessibleTypeSymbols = symbols
.OfType <INamedTypeSymbol>()
.Where(s => (arity == 0 || s.GetArity() == arity) &&
s.IsAccessibleWithin(semanticModel.Compilation.Assembly) &&
(!inAttributeContext || s.IsAttribute()) &&
HasValidContainer(s))
.ToImmutableArray();
return(accessibleTypeSymbols.SelectAsArray(s => new SymbolResult(s, weight: TypeWeight)));
}