Const vars can be optimized into string blocks

[enthus1ast]

Const variables can be optimized if they're touching a string block, saving an add call

[enthus1ast]

import macros
const foo = "foo baa"


macro dd(v: typed) =
  when v is static:
    echo "static!"
  else:
    echo "NON static!"
  if v.symKind == nskConst:
    echo "const!"
  else:
    echo "NON const"


dd(foo)

[enthus1ast]

It seems this is a hard issue: https://forum.nim-lang.org/t/9283