go: update README. Backport Func usage.

1 files changed, 3 insertions, 3 deletions

diff --git a/go/src/step5_tco/step5_tco.go b/go/src/step5_tco/step5_tco.go
index 344a533..9e176bb 100644
--- a/go/src/step5_tco/step5_tco.go
+++ b/go/src/step5_tco/step5_tco.go
@@ -133,9 +133,9 @@ func EVAL(ast MalType, env EnvType) (MalType, error) {
             env, e = NewEnv(fn.Env, fn.Params, List{el.(List).Val[1:],nil})
             if e != nil { return nil, e }
         } else {
-            fn, ok := f.(func([]MalType)(MalType, error))
+            fn, ok := f.(Func)
             if !ok { return nil, errors.New("attempt to call non-function") }
-            return fn(el.(List).Val[1:])
+            return fn.Fn(el.(List).Val[1:])
         }
     }
 
@@ -164,7 +164,7 @@ func rep(str string) (MalType, error) {
 func main() {
     // core.go: defined using go
     for k, v := range core.NS {
-        repl_env.Set(k, v)
+        repl_env.Set(k, Func{v.(func([]MalType)(MalType,error)),nil})
     }
 
     // core.mal: defined using the language itself