glued.stereotypes source code

1 module glued.stereotypes;
2 
3 import std.meta;
4 
5 public import glued.annotations;
6 import glued.utils;
7 
8 struct Tracked {}
9 
10 @Implies!Tracked
11 struct Stereotype {}
12 
13 @Stereotype
14 @Implies!Stereotype
15 @Implies!Tracked
16 struct Component {}
17 
18 @Stereotype
19 @Implies!Stereotype
20 @Implies!Tracked
21 struct Configuration {}
22 
23 //import poodinis.context: PoodinisComponent = Component;
24 
25 //template isStereotype(S) if (is(S == PoodinisComponent)) {
26 //    enum isStereotype = true;
27 //}
28 //template isStereotype(alias S) if (is(typeof(S) == PoodinisComponent)) {
29 //    enum isStereotype = true;
30 //}
31 
32 /**
33  * "is S marked as an annotation indicating something being of a stereotype?"
34  * true for things like Component, Controller, etc
35  */
36 enum isStereotype(S) = (is(S == struct) && hasAnnotation!(S, Stereotype));
37 enum isStereotype(alias S) = (is(typeof(S) == struct) && hasAnnotation!(typeof(S), Stereotype));
38 
39 //template getAnnotations(T) if (is(T == PoodinisComponent)) {
40 //    alias getAnnotations = AliasSeq!(Tracked());
41 //}
42 //template getAnnotations(alias T) if (is(T == PoodinisComponent)){
43 //    alias getAnnotations = AliasSeq!(Tracked());
44 //}
45 
46 alias getStereotypes(alias M) = Filter!(isStereotype, getAnnotations!M);
47 
48 template getStereotype(alias M, S) {
49     pragma(msg, "getStereotypes!", M, " -> ", getStereotypes!M);
50     alias found = AliasSeq!(Filter!(ofType!S, getStereotypes!M));
51 //    static assert(found.length == 1);
52     enum getStereotype = found;
53 };
54 
55 /**
56  * "is M marked as being of stereotype S?"
57  * true for example for M=UserController and S=Controller
58  */ 
59 enum isMarkedAsStereotype(alias M, S) = getStereotype!(M, S).length > 0;
60 //enum isMarkedAsStereotype(alias M, S) = Filter!(ofType!S, getStereotypes!M).length > 0;