Hi all,

Starting to browse over the reflection proposals but I didn't notice
anything talking about custom user attributes on members?

In gamedev, we often define structures that will be reflected to a GUI for
game designers and artists to use. We use this to inform the users and the
tooling. Below is a trivial example of how we might want to use custom
metadata to mark up a C++ structure.

Are there any proposals related to reflection that provide a way to have
user defined attributes like this, and tie it in to reflection so that this
metadata can be collected?

struct Description
{
    Description(const char* text):text(text){}
    const char* text;
};

struct IntRange
{
    IntRange(int min, int max):min(min),max(max){}
    int min;
    int max;
};

[[Description("describes a rectangle")]]
struct Rect
{
    [[IntRange(0, 100)]]
    [[Description("specifies the rect width")]]
    int width;

    [[IntRange(0, 100)]]
    [[Description("specifies the rect height")]]
    int height;
};