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Domains can be assigned to rule method parameters with the attribute [Domain(value)], where value is a string. If value starts with "{", "instances", "(." or null, it is interpreted as a Cord domain expression. For more information, see Domain. If the rule method is static, then value must be a string that names one of the following:
A public static method, where the containing class is also public. The method must be parameterless and the return value must be an IEnumerable<T>, where T is the type of the annotated parameter.
A public static property with a get accessor, where the containing class is also public.
A public static field in the class containing the Domain attribute, where the containing class is also public.
If the rule method is instance-based, the restrictions above apply with the exception that the method, property of field can be either static or instance-based.
Example
The following example shows how to use parameter domains.
public class C
{
[Rule]
static void MyParameterDomain([Domain("SomeInts")] int x)
{
/* ... */
}
public static IEnumerable<int> SomeInts()
{
return new int[] {1, 2, 3, 4};
}
}