Can't declare a mixin.

[deech]

Can't mixin a function.

Example

proc f() = 
  mixin a
  echo a()

proc a():string = "a"

echo f()

Current Output

testmixin.nim(2, 3) Error: invalid expression: mixin a1

Expected Output

a

Additional Information

$ nim -v
Nim Compiler Version 0.19.9 [Linux: amd64]
Compiled at 2019-05-12
Copyright (c) 2006-2019 by Andreas Rumpf

git hash: a3e27ffa2c721b2ef3b0481d7db5c45039072050
active boot switches: -d:release

[deech]

The issue is that for some reason a mixin only works inside a template or a generic proc, so this works:

template f() = 
  mixin a
  echo a()

proc a():string = "a"

f()

and so does this:

proc f[T]() =
  mixin a
  echo a()

proc a():string = "a"

f[int]()

If this is intended behavior it should be documented in the manual.

[mratsim]

Seems like a simplified duplicate of #7385