private async Task <IList <SymbolReference> > GetNamespacesForQueryPatternsAsync(SearchScope searchScope)
{
if (!_owner.CanAddImportForQuery(_diagnostic, ref _node))
{
return(null);
}
ITypeSymbol type = _owner.GetQueryClauseInfo(_semanticModel, _node, _cancellationToken);
if (type == null)
{
return(null);
}
// find extension methods named "Select"
var symbols = await searchScope.FindDeclarationsAsync("Select", SymbolFilter.Member).ConfigureAwait(false);
var extensionMethodSymbols = symbols
.OfType <IMethodSymbol>()
.Where(s => s.IsExtensionMethod && _owner.IsViableExtensionMethod(type, s))
.ToList();
return(GetProposedNamespaces(
searchScope, extensionMethodSymbols.Select(s => s.ContainingNamespace)));
}
private async Task <IList <SymbolReference> > GetNamespacesForQueryPatternsAsync(SearchScope searchScope)
{
searchScope.CancellationToken.ThrowIfCancellationRequested();
if (!_owner.CanAddImportForQuery(_diagnostic, _node))
{
return(null);
}
ITypeSymbol type = _owner.GetQueryClauseInfo(_semanticModel, _node, searchScope.CancellationToken);
if (type == null)
{
return(null);
}
// find extension methods named "Select"
var symbols = await searchScope.FindDeclarationsAsync("Select", nameNode : null, filter : SymbolFilter.Member).ConfigureAwait(false);
// Note: there is no "desiredName" when doing this. We're not going to do any
// renames of the user code. We're just looking for an extension method called
// "Select", but that name has no bearing on the code in question that we're
// trying to fix up.
var extensionMethodSymbols = OfType <IMethodSymbol>(symbols)
.Where(s => s.Symbol.IsExtensionMethod && _owner.IsViableExtensionMethod(s.Symbol, type))
.Select(s => s.WithDesiredName(null))
.ToList();
return(GetProposedNamespaces(
searchScope, extensionMethodSymbols.Select(s => s.WithSymbol(s.Symbol.ContainingNamespace))));
}
/// <summary>
/// Searches for extension methods exactly called 'Select'. Returns
/// <see cref="SymbolReference"/>s to the <see cref="INamespaceSymbol"/>s that contain
/// the static classes that those extension methods are contained in.
/// </summary>
private async Task <ImmutableArray <SymbolReference> > GetReferencesForQueryPatternsAsync(SearchScope searchScope)
{
searchScope.CancellationToken.ThrowIfCancellationRequested();
if (_owner.CanAddImportForQuery(_diagnostic, _node))
{
var type = _owner.GetQueryClauseInfo(_semanticModel, _node, searchScope.CancellationToken);
if (type != null)
{
// find extension methods named "Select"
return(await GetReferencesForExtensionMethodAsync(
searchScope, nameof(Enumerable.Select), type).ConfigureAwait(false));
}
}
return(ImmutableArray <SymbolReference> .Empty);
}