code review: switch case breaks.

* arith.c (c_unum): Add fallthrough comment.
(minus): Add missing break after case that handles char minus
heap object.. This luckily isn't a bug because type(anum)
isn't RNG, and so when it falls through, the next case also
falls through.

* lib.c (car): Add missing fallthrough comment.

2 files changed, 4 insertions, 0 deletions

diff --git a/arith.c b/arith.c
index c9c1bf3e..f0c7e168 100644
--- a/arith.c
+++ b/arith.c
@@ -174,6 +174,7 @@ ucnum c_unum(val num)
       mp_get_uintptr(mp(num), &out);
       return out;
     }
+    /* fallthrough */
   range:
     uw_throwf(error_s, lit("~s given, non-negative expected"), num, nao);
   default:
@@ -680,9 +681,11 @@ tail:
   case TAG_PAIR(TAG_CHR, TAG_PTR):
     if (type(bnum) == RNG)
       return rcons(minus(anum, from(bnum)), minus(anum, to(bnum)));
+    break;
   case TAG_PAIR(TAG_PTR, TAG_CHR):
     if (type(anum) == RNG)
       return rcons(minus(from(anum), bnum), minus(to(anum), bnum));
+    break;
   }
   uw_throwf(error_s, lit("-: invalid operands ~s ~s"), anum, bnum, nao);
 }
diff --git a/lib.c b/lib.c
index 5061609c..c1329346 100644
--- a/lib.c
+++ b/lib.c
@@ -392,6 +392,7 @@ val car(val cons)
           return funcall2(lambda_meth, cons, zero);
       }
     }
+    /* fallthrough */
   default:
     type_mismatch(lit("car: ~s is not a cons"), cons, nao);
   }