private object?ConvertScalar(string?value, Type targetType)
{
try
{
// Primitive
var primitiveConverter = PrimitiveConverters.GetValueOrDefault(targetType);
if (primitiveConverter != null)
{
return(primitiveConverter(value));
}
// Enum
if (targetType.IsEnum)
{
return(Enum.Parse(targetType, value, true));
}
// Nullable
var nullableUnderlyingType = targetType.GetNullableUnderlyingType();
if (nullableUnderlyingType != null)
{
return(!string.IsNullOrWhiteSpace(value)
? ConvertScalar(value, nullableUnderlyingType)
: null);
}
// String-constructible
var stringConstructor = targetType.GetConstructor(new[] { typeof(string) });
if (stringConstructor != null)
{
return(stringConstructor.Invoke(new object[] { value ! }));
}
private object?ConvertScalar(string?value, Type targetType)
{
try
{
// Custom conversion (always takes highest priority)
if (ConverterType != null)
{
return(ConverterType.CreateInstance <IArgumentValueConverter>().ConvertFrom(value !));
}
// No conversion necessary
if (targetType == typeof(object) || targetType == typeof(string))
{
return(value);
}
// Bool conversion (special case)
if (targetType == typeof(bool))
{
return(string.IsNullOrWhiteSpace(value) || bool.Parse(value));
}
// Primitive conversion
var primitiveConverter = PrimitiveConverters.GetValueOrDefault(targetType);
if (primitiveConverter != null && !string.IsNullOrWhiteSpace(value))
{
return(primitiveConverter(value));
}
// Enum conversion
if (targetType.IsEnum && !string.IsNullOrWhiteSpace(value))
{
return(Enum.Parse(targetType, value, true));
}
// Nullable<T> conversion
var nullableUnderlyingType = targetType.TryGetNullableUnderlyingType();
if (nullableUnderlyingType != null)
{
return(!string.IsNullOrWhiteSpace(value)
? ConvertScalar(value, nullableUnderlyingType)
: null);
}
// String-constructible conversion
var stringConstructor = targetType.GetConstructor(new[] { typeof(string) });
if (stringConstructor != null)
{
return(stringConstructor.Invoke(new object[] { value ! }));
}