internal static TokenRenameInfo GetTokenRenameInfo(
ISemanticFactsService semanticFacts,
SemanticModel semanticModel,
SyntaxToken token,
CancellationToken cancellationToken
)
{
var symbol = semanticFacts.GetDeclaredSymbol(semanticModel, token, cancellationToken);
if (symbol != null)
{
return(TokenRenameInfo.CreateSingleSymbolTokenInfo(symbol));
}
var symbolInfo = semanticModel.GetSymbolInfo(token, cancellationToken);
if (symbolInfo.Symbol != null)
{
if (symbolInfo.Symbol.IsTupleType())
{
return(TokenRenameInfo.NoSymbolsTokenInfo);
}
return(TokenRenameInfo.CreateSingleSymbolTokenInfo(symbolInfo.Symbol));
}
if (
symbolInfo.CandidateReason == CandidateReason.MemberGroup &&
symbolInfo.CandidateSymbols.Any()
)
{
// This is a reference from a nameof expression. Allow the rename but set the RenameOverloads option
return(TokenRenameInfo.CreateMemberGroupTokenInfo(symbolInfo.CandidateSymbols));
}
if (
RenameLocation.ShouldRename(symbolInfo.CandidateReason) &&
symbolInfo.CandidateSymbols.Length == 1
)
{
// TODO(cyrusn): We're allowing rename here, but we likely should let the user
// know that there is an error in the code and that rename results might be
// inaccurate.
return(TokenRenameInfo.CreateSingleSymbolTokenInfo(symbolInfo.CandidateSymbols[0]));
}
return(TokenRenameInfo.NoSymbolsTokenInfo);
}
