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-rw-r--r--compar.c15
1 files changed, 9 insertions, 6 deletions
diff --git a/compar.c b/compar.c
index 058d912..e9b1d4b 100644
--- a/compar.c
+++ b/compar.c
@@ -210,8 +210,8 @@ cmp_between(VALUE x, VALUE min, VALUE max)
* -20.clamp(0..) #=> 0
* 523.clamp(..100) #=> 100
*
- * When _range.end_ is excluded, and _obj_ is greater than or
- * equal to _range.end_, an exception is raised.
+ * When _range.end_ is excluded and not +nil+, an exception is
+ * raised.
*
* 100.clamp(0...100) # ArgumentError
*/
@@ -220,7 +220,7 @@ static VALUE
cmp_clamp(int argc, VALUE *argv, VALUE x)
{
VALUE min, max;
- int c, excl = 0, allow_nil = 0;
+ int c, excl = 0;
if (rb_scan_args(argc, argv, "11", &min, &max) == 1) {
VALUE range = min;
@@ -228,9 +228,13 @@ cmp_clamp(int argc, VALUE *argv, VALUE x)
rb_raise(rb_eTypeError, "wrong argument type %s (expected Range)",
rb_builtin_class_name(range));
}
- allow_nil = 1;
+ if (!NIL_P(max)) {
+ if (excl) rb_raise(rb_eArgError, "cannot clamp with an exclusive range");
+ if (!NIL_P(min) && cmpint(min, max) > 0) goto arg_error;
+ }
}
- if (!(allow_nil && (NIL_P(min) || NIL_P(max))) && cmpint(min, max) > 0) {
+ else if (cmpint(min, max) > 0) {
+ arg_error:
rb_raise(rb_eArgError, "min argument must be smaller than max argument");
}
@@ -241,7 +245,6 @@ cmp_clamp(int argc, VALUE *argv, VALUE x)
}
if (!NIL_P(max)) {
c = cmpint(x, max);
- if (excl && c >= 0) rb_raise(rb_eArgError, "cannot clamp with an exclusive range");
if (c > 0) return max;
}
return x;