return fixed for real, tests added

regression/test087.expr

@@ -0,0 +1,41 @@
+local n;
+
+infix "===" at "==" (v1, v2) {
+  local s1, s2, i;
+  
+  s1 := v1.string;
+  s2 := v2.string;
+
+  if s1.length == s2.length
+  then
+    for i := 0, i < s1.length, i := i + 1
+    do
+      if s1[i] != s2[i] then return 0 fi  
+    od;
+     1
+  else 0
+  fi
+}
+
+infix "?" before "+" (v, l) {
+  case l of
+   {}      ->  0
+  | h : tl -> if h === v then 1 else (v ? tl) fi
+  esac
+}
+
+infix "+++" at "+" (l1, l2) {
+  case l1 of
+    {}     -> l2
+  | h : tl -> (h : tl +++ l2)
+  esac
+}
+
+n := read ();
+
+write ({1, 2, 3} === {1, 2, 3}); 
+write ({1, 2, 3} === {1, 2, 4});
+write (1+2 ? {1, 2, 3});
+write (1*3+2 ? {1, 2, 3});
+write (1*3+2 ? {1, 2, 5});
+write (8*4 ? {1, 2, 3} +++ {5, 7, 32, 6})