public static FunctionPointerMethodSymbol CreateFromSource(FunctionPointerTypeSyntax syntax, Binder typeBinder, DiagnosticBag diagnostics, ConsList <TypeSymbol> basesBeingResolved, bool suppressUseSiteDiagnostics)
{
var(callingConvention, conventionIsValid) = FunctionPointerTypeSymbol.GetCallingConvention(syntax.CallingConvention.Text);
if (!conventionIsValid)
{
// '{0}' is not a valid calling convention for a function pointer. Valid conventions are 'cdecl', 'managed', 'thiscall', and 'stdcall'.
diagnostics.Add(ErrorCode.ERR_InvalidFunctionPointerCallingConvention, syntax.CallingConvention.GetLocation(), syntax.CallingConvention.Text);
}
RefKind refKind = RefKind.None;
TypeWithAnnotations returnType;
var refReadonlyModifiers = ImmutableArray <CustomModifier> .Empty;
if (syntax.Parameters.Count == 0)
{
returnType = TypeWithAnnotations.Create(typeBinder.CreateErrorType());
}
else
{
var returnTypeParameter = syntax.Parameters[^ 1];
