Bug #12875
Updated by lionel_perrin (Lionel PERRIN) about 8 years ago
The following code raises "Test can't be coerced into Fixnum (TypeError)"
~~~ ruby
class Test
attr_accessor :value
def initialize(value)
@value = value
end
def |(other)
case(other)
when Test
@value | other.value
else
@value | other
end
end
def coerce(other)
[Test.new(other), self]
end
end
1 | Test.new(2)
~~~
whereas the following works fine
~~~ ruby
class Test
attr_accessor :value
def initialize(value)
@value = value
end
def +(other)
case(other)
when Test
@value + other.value
else
@value + other
end
end
def coerce(other)
[Test.new(other), self]
end
end
1 + Test.new(2)
~~~
It looks to me that the implementation of bit_coerce in numeric.c is not correct:
~~~ c
static int
bit_coerce(VALUE *x, VALUE *y)
{
if (!RB_INTEGER_TYPE_P(*y)) {
VALUE orig = *x;
do_coerce(x, y, TRUE);
if (!RB_INTEGER_TYPE_P(*x) && !RB_INTEGER_TYPE_P(*y)) {
coerce_failed(orig, *y);
}
}
return TRUE;
}
~~~
My feeling is that it should be fine for the coerce method to return something else than integers, as long as the bit operator is implemented on the first element of the array.
For instance, in my case, it returns two Test instances and the operator '|' is correctly defined on Test instances. It should try this operator.
Regards,
Lionel