Implement cratera bootstrap

1 files changed, 6 insertions, 3 deletions

diff --git a/src/cratera/init.lua b/src/cratera/init.lua
index bac3f53..a354d56 100644
--- a/src/cratera/init.lua
+++ b/src/cratera/init.lua
@@ -16,13 +16,16 @@
     along with this program.  If not, see <https://www.gnu.org/licenses/>.
 --]]
 
--- This code is highly experimental and not very good
-
 local parser = require "cratera.parser"
 local luatokens = require "cratera.luatokens"
 local compiler = require "cratera.compiler"
 
-local LUA_SIGNATURE = string.dump(function() end):sub(1,1)
+local LUA_SIGNATURE
+if string.dump then
+    LUA_SIGNATURE = string.dump(function() end):sub(1,1)
+else
+    LUA_SIGNATURE = string.char(27)
+end
 
 local function cratera_load(reader, ...)
     if type(reader) == "string" and reader:sub(1,1) == LUA_SIGNATURE then