Pseudo import/include paths

A directory can also be a so-called “pseudo directory”. They can be used to avoid ambiguity when there are multiple modules with the same path.

There are two pseudo directories:

1. std: The std pseudo directory is the abstract location of Nim’s standard library. For example, the syntax import std / strutils is used to unambiguously refer to the standard library’s strutils module.
2. pkg: The pkg pseudo directory is used to unambiguously refer to a Nimble package. However, for technical details that lie outside the scope of this document, its semantics are: Use the search path to look for module name but ignore the standard library locations. In other words, it is the opposite of std.

It is recommended and preferred but not currently enforced that all stdlib module imports include the std/ “pseudo directory” as part of the import name.