private static bool?GetMemberRequiredFromAttributes(
AttributedMembers attrMembers,
Location?location,
ImmutableArray <AttributeSyntax> attrs,
ref ImmutableArray <Diagnostic> diags
)
{
var requiredByte = Utils.GetConstantsWithName <byte>(attrMembers, attrs, "MemberRequired", ref diags);
var requiredBool = Utils.GetConstantsWithName <bool>(attrMembers, attrs, "IsRequired", ref diags);
var total = requiredByte.Length + requiredBool.Length;
if (total > 1)
{
var diag = Diagnostics.IsRequiredSpecifiedMultipleTimes(location);
diags = diags.Add(diag);
return(null);
}
if (total == 0)
{
return(null);
}
if (requiredByte.Length == 1)
{
var byteVal = requiredByte.Single();
var logicalVal =
byteVal switch
{
1 => true,
2 => false,
_ => default(bool?)
};
if (logicalVal == null)
{
var diag = Diagnostics.UnexpectedConstantValue(location, byteVal.ToString(), new[] { "Yes", "No" });
diags = diags.Add(diag);
return(null);
}
return(logicalVal);
}
var boolVal = requiredBool.Single();
return(boolVal);
}
