// NOTE: not guaranteed to be a method (e.g. class op_Addition)
// NOTE: constructor fallback logic applies
private ImmutableArray <Symbol> BindOperatorMemberCref(OperatorMemberCrefSyntax syntax, NamespaceOrTypeSymbol containerOpt, out Symbol ambiguityWinner, DiagnosticBag diagnostics)
{
const int arity = 0;
CrefParameterListSyntax parameterListSyntax = syntax.Parameters;
// NOTE: Prefer binary to unary, unless there is exactly one parameter.
// CONSIDER: we're following dev11 by never using a binary operator name if there's
// exactly one parameter, but doing so would allow us to match single-parameter constructors.
SyntaxKind operatorTokenKind = syntax.OperatorToken.Kind();
string memberName = parameterListSyntax != null && parameterListSyntax.Parameters.Count == 1
? null
: OperatorFacts.BinaryOperatorNameFromSyntaxKindIfAny(operatorTokenKind);
memberName = memberName ?? OperatorFacts.UnaryOperatorNameFromSyntaxKindIfAny(operatorTokenKind);
if (memberName == null)
{
ambiguityWinner = null;
return(ImmutableArray <Symbol> .Empty);
}
ImmutableArray <Symbol> sortedSymbols = ComputeSortedCrefMembers(syntax, containerOpt, memberName, arity, syntax.Parameters != null, diagnostics);
if (sortedSymbols.IsEmpty)
{
ambiguityWinner = null;
return(ImmutableArray <Symbol> .Empty);
}
return(ProcessCrefMemberLookupResults(
sortedSymbols,
arity,
syntax,
typeArgumentListSyntax: null,
parameterListSyntax: parameterListSyntax,
ambiguityWinner: out ambiguityWinner,
diagnostics: diagnostics));
}
