witchcraft.impl.attributes source code

1 
2 module witchcraft.impl.attributes;
3 
4 import witchcraft;
5 
6 import std.variant;
7 
8 class AttributeImpl(alias attribute) : Attribute
9 {
10     override Variant get() const
11     {
12         static if(is(typeof(attribute)))
13         {
14             return Variant(attribute);
15         }
16         else
17         {
18             return Variant(null);
19         }
20     }
21 
22     override const(Type) getAttributeType() const
23     {
24         static if(is(typeof(attribute)))
25         {
26             static if(__traits(compiles, typeof(attribute).metaof))
27             {
28                 return typeof(attribute).metaof;
29             }
30             else
31             {
32                 return null;
33             }
34         }
35         else
36         {
37             static if(__traits(compiles, attribute.metaof))
38             {
39                 return attribute.metaof;
40             }
41             else
42             {
43                 return null;
44             }
45         }
46     }
47 
48     override const(TypeInfo) getAttributeTypeInfo() const
49     {
50         static if(is(typeof(attribute)))
51         {
52             return typeid(typeof(attribute));
53         }
54         else
55         {
56             return typeid(attribute);
57         }
58     }
59 
60     override bool isExpression() const
61     {
62         return is(typeof(attribute));
63     }
64 
65     override bool isType() const
66     {
67         return !isExpression;
68     }
69 }