Error: undeclared identifier: 'shallowCopy'`` on all examples

[general-rishkin]

All the examples I try give the following error:

neo/dense.nim(90, 14) Error: undeclared identifier: 'shallowCopy'

I am using Nim Compiler Version 1.9.1 .

[andreaferretti]

See this PR. The issue is: shallowCopy was kind of needed to have matrices that share storage (think of taking a row, or the transpose of a matrix, without making copies). So I have not accepted the PR yet.

I can probably work arund this with the shallow pragma, but it would take a while... I am no actively using Nim right now, so this kind of language level change is rather disruptive. If you want to start from that PR and ensure that copies are actually shallow, I would be happy to accept it

[NahuelUTNPigui]

As someone who has the same problem, an easy solucion is write --gc:refc as option, something like nim c --gc:refc -r main.nim
PD: you can use this command nim c --mm:refc -r main.nim too