diff options
Diffstat (limited to 'numeric.c')
| -rw-r--r-- | numeric.c | 26 |
1 files changed, 23 insertions, 3 deletions
@@ -3854,11 +3854,19 @@ fix_le(VALUE x, VALUE y) } /* - * Document-method: Fixnum#~ + * Document-method: Integer#~ * call-seq: - * ~fix -> integer + * ~integer -> integer * * One's complement: returns a number where each bit is flipped. + * + * Inverts the bits in a integer. As Integers are conceptually infinite + * length, the result acts as if it had an infinite number of one + * bits to the left. In hex representations, this is displayed + * as two periods to the left of the digits. + * + * sprintf("%X", ~0x1122334455) #=> "..FEEDDCCBBAA" + * */ static VALUE @@ -3867,6 +3875,18 @@ fix_rev(VALUE num) return ~num | FIXNUM_FLAG; } +static VALUE +int_comp(VALUE num) +{ + if (FIXNUM_P(num)) { + return fix_rev(num); + } + else if (RB_TYPE_P(num, T_BIGNUM)) { + return rb_big_neg(num); + } + return Qnil; +} + static int bit_coerce(VALUE *x, VALUE *y) { @@ -4791,7 +4811,7 @@ Init_Numeric(void) rb_define_method(rb_cFixnum, "<", fix_lt, 1); rb_define_method(rb_cFixnum, "<=", fix_le, 1); - rb_define_method(rb_cFixnum, "~", fix_rev, 0); + rb_define_method(rb_cInteger, "~", int_comp, 0); rb_define_method(rb_cInteger, "&", int_and, 1); rb_define_method(rb_cInteger, "|", int_or, 1); rb_define_method(rb_cInteger, "^", int_xor, 1); |