public static LocatedNullable <bool> GetOptionalBool(
this XElement elem, string name, bool?defaultValue = null)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
return(Located.Create(defaultValue));
}
if (attrib.Value == "true" || attrib.Value == "1")
{
return(Located.Create((bool?)true, attrib.GetValueLocation()));
}
if (attrib.Value == "false" || attrib.Value == "0")
{
return(Located.Create((bool?)false, attrib.GetValueLocation()));
}
throw CreateInvalidBoolValueException(attrib);
}
public static LocatedRef <string> GetString(this XElement elem, string name)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
throw CreateMissingAttributeException(elem, name);
}
return(Located.Create(attrib.Value, attrib.GetValueLocation()));
}
public static LocatedRef <string> GetCSymbol(
this XElement elem, string name, string defaultValue = null)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
return(Located.Create(defaultValue));
}
return(Located.Create(attrib.Value, attrib.GetValueLocation()));
}
public static LocatedVal <Guid> GetGuid(this XElement elem, string name)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
throw CreateMissingAttributeException(elem, name);
}
if (!Guid.TryParseExact(attrib.Value, "B", out var value))
{
throw CreateInvalidNumberValueException <byte>(attrib);
}
return(Located.Create(value, attrib.GetValueLocation()));
}
public static LocatedVal <ulong> GetHexInt64(this XElement elem, string name)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
throw CreateMissingAttributeException(elem, name);
}
if (!TryParse(attrib.Value, NumberFormat.PrefixedHex, out ulong value))
{
throw CreateInvalidHexNumberValueException <ulong>(attrib);
}
return(Located.Create(value, attrib.GetValueLocation()));
}
public static LocatedVal <uint> GetUInt32(this XElement elem, string name)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
throw CreateMissingAttributeException(elem, name);
}
if (!TryParse(attrib.Value, NumberFormat.HexDec, out uint value))
{
throw CreateInvalidNumberValueException <uint>(attrib);
}
return(Located.Create(value, attrib.GetValueLocation()));
}
public static LocatedRef <QName> GetQName(this XElement elem, string name)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
if (name == null)
{
throw new ArgumentNullException(nameof(name));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
throw CreateMissingAttributeException(elem, name);
}
return(Located.Create(
QName.Parse(attrib.Value, new XElementNamespaceResolver(elem)),
attrib.GetValueLocation()));
}
public static LocatedNullable <Guid> GetOptionalGuid(
this XElement elem, string name, Guid?defaultValue = null)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
return(Located.Create(defaultValue));
}
if (!Guid.TryParseExact(attrib.Value, "B", out var value))
{
throw CreateInvalidNumberValueException <byte>(attrib);
}
return(Located.Create((Guid?)value, attrib.GetValueLocation()));
}
public static LocatedNullable <ushort> GetOptionalUInt16(
this XElement elem, string name, ushort?defaultValue = null)
{
if (elem == null)
{
throw new ArgumentNullException(nameof(elem));
}
XAttribute attrib = elem.Attribute(name);
if (attrib == null)
{
return(Located.Create(defaultValue));
}
if (!TryParse(attrib.Value, NumberFormat.HexDec, out ushort value))
{
throw CreateInvalidNumberValueException <ushort>(attrib);
}
return(Located.Create((ushort?)value, attrib.GetValueLocation()));
}
