diff options
Diffstat (limited to 'python/step8_macros.py')
| -rw-r--r-- | python/step8_macros.py | 14 |
1 files changed, 6 insertions, 8 deletions
diff --git a/python/step8_macros.py b/python/step8_macros.py index adb4546..90aedf3 100644 --- a/python/step8_macros.py +++ b/python/step8_macros.py @@ -121,18 +121,16 @@ def PRINT(exp): repl_env = Env() def REP(str): return PRINT(EVAL(READ(str), repl_env)) -def _ref(k,v): repl_env.set(k, v) -# Import types functions -for name, val in core.ns.items(): _ref(name, val) +# core.py: defined using python +for k, v in core.ns.items(): repl_env.set(k, v) +repl_env.set('eval', lambda ast: EVAL(ast, repl_env)) -_ref('read-string', reader.read_str) -_ref('eval', lambda ast: EVAL(ast, repl_env)) -_ref('slurp', lambda file: open(file).read()) - -# Defined using the language itself +# core.mal: defined using the language itself REP("(def! not (fn* (a) (if a false true)))") REP("(def! load-file (fn* (f) (eval (read-string (str \"(do \" (slurp f) \")\")))))") +REP("(defmacro! cond (fn* (& xs) (if (> (count xs) 0) (list 'if (first xs) (if (> (count xs) 1) (nth xs 1) (throw \"odd number of forms to cond\")) (cons 'cond (rest (rest xs)))))))") +REP("(defmacro! or (fn* (& xs) (if (empty? xs) nil (if (= 1 (count xs)) (first xs) `(let* (or_FIXME ~(first xs)) (if or_FIXME or_FIXME (or ~@(rest xs))))))))") if len(sys.argv) >= 2: REP('(load-file "' + sys.argv[1] + '")') |