witchcraft.impl.fields source code

1 
2 module witchcraft.impl.fields;
3 
4 version(aggressive):
5 
6 import witchcraft;
7 
8 import std.variant;
9 
10 template FieldImpl(alias T, string name)
11 {
12     // TODO : Determine this more reliably.
13     static if(__traits(getProtection, __traits(getMember, T, name)) == "public")
14     {
15         mixin WitchcraftField;
16 
17         alias FieldImpl = FieldMixin!(T, name);
18     }
19     else
20     {
21         class FieldImpl : Field
22         {
23             override Variant get(Variant instance) const
24             {
25                 assert(0, "Field " ~ name ~ " is inaccessible.");
26             }
27 
28             const(Attribute)[] getAttributes() const
29             {
30                 assert(0, "Field " ~ name ~ " is inaccessible.");
31             }
32 
33             const(Type) getDeclaringType() const
34             {
35                 assert(0, "Field " ~ name ~ " is inaccessible.");
36             }
37 
38             const(TypeInfo) getDeclaringTypeInfo() const
39             {
40                 assert(0, "Field " ~ name ~ " is inaccessible.");
41             }
42 
43             string getFullName() const
44             {
45                 assert(0, "Field " ~ name ~ " is inaccessible.");
46             }
47 
48             @property
49             string getName() const
50             {
51                 return name;
52             }
53 
54             string getProtection() const
55             {
56                 return __traits(getProtection, __traits(getMember, T, name));
57             }
58 
59             override const(Type) getValueType() const
60             {
61                 assert(0, "Field " ~ name ~ " is inaccessible.");
62             }
63 
64             override const(TypeInfo) getValueTypeInfo() const
65             {
66                 assert(0, "Field " ~ name ~ " is inaccessible.");
67             }
68 
69             @property
70             override bool isStatic() const
71             {
72                 assert(0, "Field " ~ name ~ " is inaccessible.");
73             }
74 
75             @property
76             bool isAccessible() const
77             {
78                 return __traits(hasMember, typeof(this), "member");
79             }
80 
81             @property
82             override bool isWritable() const
83             {
84                 return __traits(compiles, {
85                     T instance = void;
86                     typeof(member) value = void;
87 
88                     __traits(getMember, instance, name) = value;
89                 });
90             }
91 
92             override void set(Variant instance, Variant value) const
93             {
94                 assert(0, "Field " ~ name ~ " is inaccessible.");
95             }
96         }
97     }
98 }