gistfile1.txt

import macros
from strutils import format

macro constStr* (name; str: expr[string]): stmt {.immediate.}=
  ##need a check for top level statement??
  result = """{.emit: "prog_char $1_data[] PROGMEM = \"$2\"; ".}
var $1_data {.importc, nodecl.}: array[$3, char]
template $1: cstring = $1_data[0].addr""".format(name, str, str.strval.len).parseStmt
  result.repr.echo


constStr string_0, "String 0"