On Monday, 22 June 2015 at 19:09:40 UTC, weaselcat wrote:
I never seem to use them for anything, has anyone else done
anything interesting with them?
I use them to annotate the setter/getter pairs in classes. Two
analyzers look for them to automatically create what i call a
"property descriptor".
https://github.com/BBasile/iz/blob/master/import/iz/properties.d#L362
Property descriptors are then used to
- bind/synchronize several properties together.
- serialize or deserialize classes.
This is directly inspired by Pascal's "published" property. All
the type information system is replaced with UDA and static
analysis:
Pascal:
---
published property myProp: integer read getMyProp write setMyProp;
---
D2 equivalent:
---
@SetGet private int _field; // solution 1: use directly the field
@Set void myProp(int value){} // solution 2: use explicit
accessors.
@Get int myProp(){return _field;}
---
The Annotations work very well with virtual methods. For example
the most derivated (overriden) anotated @Set/@Get is always took
by the analyzer, like expected.
