/// <summary>
/// 解析出一个类的分析参数以及泛型约束
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static Dictionary <string, IEnumerable <GenericeConstraintInfo> > GetGenericeParam(this Type type)
{
return(GenericeAnalysis.GetConstrains(type));
}
private static IEnumerable <GenericeConstraintInfo> GetOneConstrain(Type paramter, IEnumerable <Type> constraintType, GenericParameterAttributes attributes)
{
// struct unmanaged
var only = IsStructOrUnmanaged(constraintType.ToArray(), attributes);
if (only.IsThis)
{
return new GenericeConstraintInfo[] { new GenericeConstraintInfo(only.Keyword, only.Location, only.Value) }
}
;
List <GenericeConstraintInfo> list = new List <GenericeConstraintInfo>();
var types = constraintType.GetEnumerator();
#region 第一位置
// classs
if ((attributes | GenericParameterAttributes.ReferenceTypeConstraint) == attributes)
{
list.Add(new GenericeConstraintInfo(GenericKeyword.Class, ConstraintLocation.First, "class"));
attributes = attributes ^ GenericParameterAttributes.ReferenceTypeConstraint;
}
// notnull
else if (!constraintType.Any() && attributes == GenericParameterAttributes.None)
{
// notnull
// System.Runtime.CompilerServices.NullableAttribute
if (paramter.GetCustomAttributes().Any(x => x.GetType().Name.CompareTo("NullableAttribute") == 0))
{
list.Add(new GenericeConstraintInfo(GenericKeyword.Notnull, ConstraintLocation.First, "notnull"));
}
else
{
return new GenericeConstraintInfo[] { new GenericeConstraintInfo(GenericKeyword.NoConstrant, ConstraintLocation.None, string.Empty) }
};
}
// <baseclass>
else if (constraintType.FirstOrDefault(x => !x.IsInterface && x != typeof(object)) is var baseClassType && baseClassType != null)
{
list.Add(new GenericeConstraintInfo(GenericKeyword.BaseClass, ConstraintLocation.First, GenericeAnalysis.GetGenriceName(baseClassType)));
types.MoveNext();
}
#endregion
#region 中间位置
if (constraintType.Any())
{
while (types.MoveNext())
{
var item = types.Current;
list.Add(
new GenericeConstraintInfo(item.IsInterface ? GenericKeyword.Interface : GenericKeyword.TU,
ConstraintLocation.Any,
GenericeAnalysis.GetGenriceName(item))
);
}
}
#endregion
// new
if ((attributes | GenericParameterAttributes.DefaultConstructorConstraint) == attributes)
{
list.Add(new GenericeConstraintInfo(GenericKeyword.New, ConstraintLocation.End, "new()"));
}
return(list);
}
/// <summary>
/// 获取泛型类的名称
/// </summary>
/// <param name="type"></param>
/// <returns></returns>
public static string GetGenericeName(this Type type)
{
return(GenericeAnalysis.GetGenriceName(type));
}