Raised when the specified key is not found. It is a subclass of IndexError.
h = {"foo" => :bar} h.fetch("foo") #=> :bar h.fetch("baz") #=> KeyError: key not found: "baz"
Return the key caused this KeyError exception.
static VALUE
key_err_key(VALUE self)
{
VALUE key;
key = rb_ivar_lookup(self, id_key, Qundef);
if (key != Qundef) return key;
rb_raise(rb_eArgError, "no key is available");
}
Return the receiver associated with this KeyError exception.
static VALUE
key_err_receiver(VALUE self)
{
VALUE recv;
recv = rb_ivar_lookup(self, id_receiver, Qundef);
if (recv != Qundef) return recv;
rb_raise(rb_eArgError, "no receiver is available");
}