Type mismatch when trying to add to custom seq

Right, I see. Thanks for the explanation :)

Type mismatch when trying to add to custom seq

It's a subtle bug, but essentially your object isn't mutable, so the sequence isn't mutable. The type error is because it's `seq[Terminal]` and `add` requires a `var seq[Terminal]`. Replacing `schematicConnect` with this works: proc schematicConnect(schematic: var Schematic, termina

Type mismatch when trying to add to custom seq

Works using intermediate variables (and one var in proc definition):

Type mismatch when trying to add to custom seq

Tried to reconstruct it using your playground but it doesn't produce the same error so here's the exact code. Sorry if it's a bit unreadable :/

Type mismatch when trying to add to custom seq

This works for me trying to reconstruct missing parts:

Type mismatch when trying to add to custom seq

`adjacencyList.connections.add(terminal)` is the exact line that causes the error. `adjacencyList` is a `seq[Terminal]` and terminal has type `Terminal`

Type mismatch when trying to add to custom seq

Can you provide an example of the code where you're adding to a sequence?

Type mismatch when trying to add to custom seq

I've defined a custom type in my nim script, here's the definition: type Terminal = tuple name: string terminalType: TerminalType # enum defined elsewhere in the program parentComponent: ref Component # type defined elsewhere in the progra