A-M baby

2013-04-10 21:29:02 -07:00 · 2013-04-10 21:29:02 -07:00 · db842d013d
commit db842d013d
parent 764da6cbbb
19005 changed files with 197040 additions and 7 deletions
--- a/Task/Flow-control-structures/Forth/flow-control-structures.fth
+++ b/Task/Flow-control-structures/Forth/flow-control-structures.fth
@ -0,0 +1,13 @@
+: checked-array
+  CREATE ( size -- ) DUP , CELLS ALLOT
+  DOES> ( i -- a+i )
+    2DUP @ 0 SWAP WITHIN IF
+      SWAP 1+ CELLS +
+    ELSE
+      1 THROW
+    THEN ;
+
+8 checked-array myarray
+
+: safe-access ( i -- a[i] )
+  ['] myarray CATCH 1 = IF ." Out of bounds!" 0 THEN ;