It's not clear what you mean, but there should never be a case where you need
to check in library code the import of the user code.
If your library has required dependencies, then your module should re-export
them.
For example :
# Package foo
# src/foo/bar.nim
proc bar*() = discard
# src/foo.nim
import bar
proc foo*() = discard
export bar # bar() is a
# external user code
import foo
foo()
bar()
Run
Otherwise you can use `when compiles(...): doStuff()` to check at compile time
if the module is present :
# import std/re
when compiles(re):
echo "OK import re"
else:
echo "KO import re"
import strutils
when compiles(strutils):
echo "OK import strutils"
else:
echo "KO import strutils"
Run
But I really don't know why you would need this construct and this feels like a
XY problem.
