I see, the reason you get the undeclared identifier error is because of scopes.
When you define a var in a for loop it can't be accessed from outside. This is
a simplified example:
for i in 0 .. 10:
var x = 1
echo x # Error: undeclared identifier: 'x'
Run
Second reason is that templates have
[hygiene](https://nim-lang.org/docs/manual.html#templates-hygiene-in-templates)
which means variables defined in a template can't be accessed from the outside.
There are two solutions to this, injecting the variables or marking the
template with the
{.dirty.}
Run
pragma which removes all hygiene. But the scope thing is the one that's
limiting you in this case.
I can't come up with anything from the top of my head right now but I'll try to
figure something out :/
