Macro with name on unexpected behaviour

[coffeepots]

Module A:

macro ona*(body: untyped): untyped =
  discard

macro on*(body: untyped): untyped =
  discard

Module B:

import modulea

ona:
  echo "a" # no problem

on:
  echo "b" # Error: expression 'echo ["b"]' has no type (or is ambiguous)

Changing the name of the macro from on fixes the problem.

[data-man]

For off the same.

[arnetheduck]

isn't this because

Nim/lib/system.nim

Line 56 in a39b989

on* = true ## alias for ``true``

?

[Araq]

Yeah, but I wonder why overloading resolution picks up consts. :-)

[metagn]

It finds system.on first then calls semIndirectOp which calls semOpAux which typechecks all the arguments.

Maybe other symbols should also call semDirectOp/semMagic the same way ambiguous type symbols do