I didn't realize the chain of restrictions involving global/const/immutable, so I think that option is out.
I tried using the delegate function you recommended. Your example with passing a string worked. Then I tried to mass my custom struct RequestPass, stored in m_pass. These lines of code:
m_pass.bks = new CassaClient("127.0.0.1", 9042, "bolt");
router.get(m_subPath ~ "register", (req, res) => bolt.views.user.register(req, res, m_pass));
yielded this error:
source/bolt/bolt.d(77): Error: need 'this' for 'm_pass' of type 'RequestPass'
Replacing m_pass with this.m_pass yielded the exact same error. I'm not sure what to do differently. I thought it might be clever to try this
auto pass = &m_pass;
router.get(m_subPath ~ "register", (req, res) => bolt.views.user.register(req, res, *pass));
Which left me with this error.
source/bolt/bolt.d(80): Error: function bolt.bolt.Bolt.register.__lambda2 cannot access frame of function bolt.bolt.Bolt.register
I've tried many of times to write a delegate function out, but I keep failing. I feel like I need something like the following:
void delegate() dg = bolt.views.user.register(req, res, m_pass);
, or
auto dg = &bolt.views.user.register;
But my Bolt class has no access to req or res, so far as I can tell.. and my register function requires req and res.. so I've dropped that for the time being.
Now, I happened across a thing such as mixin(import("user.d")) which is less elegant, but would work great for me. But I'm getting this error for relative and absolute paths to files:
source/bolt/bolt.d(109): Error: file "user.d" cannot be found or not in a path specified with -J