call/cc seems to be working!

[scheme.forth.jl.git] / src / scheme.4th

diff --git a/src/scheme.4th b/src/scheme.4th
index 36a8106..9d64667 100644 (file)
--- a/src/scheme.4th
+++ b/src/scheme.4th
@@ -551,11 +551,16 @@ global-env obj!
   depth 2- 2/ fixnum-type 2swap cons
 ;
 
-: make-continuation
+: make-continuation ( -- continuation true-obj )
+    \ true-obj allows calling code to detect whether
+    \ it is being called immediately following make-continuation
+    \ or by a restore-continuation.
 
   cons-param-stack
   cons-return-stack
   cons drop continuation-type
+
+  true boolean-type
 ;
 
 : continuation->pstack-list
@@ -627,6 +632,10 @@ global-env obj!
 
     2swap
 
+    false boolean-type \ Add flag signifying continuation restore
+
+    2swap
+
     restore-return-stack
 ;