Lua: all steps and self-hosting.

Also some misc docs/TODO updates.

1 files changed, 25 insertions, 0 deletions

diff --git a/lua/step0_repl.lua b/lua/step0_repl.lua
new file mode 100755
index 0000000..24584d2
--- /dev/null
+++ b/lua/step0_repl.lua
@@ -0,0 +1,25 @@
+#!/usr/bin/env lua
+
+local readline = require('readline')
+
+function READ(str)
+    return str
+end
+
+function EVAL(ast, any)
+    return ast
+end
+
+function PRINT(exp)
+    return exp
+end
+
+function rep(str)
+    return PRINT(EVAL(READ(str),""))
+end
+
+while true do
+    line = readline.readline("user> ")
+    if not line then break end
+    print(rep(line))
+end