`}
redef class Int
+ # Returns a random `Int` in `[0 .. self[`.
fun rand: Int is extern "kernel_Int_Int_rand_0"
fun bin_and(i: Int): Int is extern "kernel_Int_Int_binand_0"
fun bin_or(i: Int): Int is extern "kernel_Int_Int_binor_0"
fun bin_xor(i: Int): Int is extern "kernel_Int_Int_binxor_0"
- fun sqrt : Int is extern `{ return sqrtl(recv); `}
- fun sin : Int is extern `{ return sinl(recv); `}
- fun cos : Int is extern `{ return cosl(recv); `}
+ fun sqrt: Int `{ return sqrt(recv); `}
+ # Returns the greatest common divisor of `self` and `o`
+ #
+ # assert 54.gcd(24) == 6
+ # assert -54.gcd(-24) == 6
+ # assert 54.gcd(-24) == -6
+ # assert -54.gcd(24) == -6
+ # assert 12.gcd(6) == 6
+ fun gcd(o: Int): Int
+ do
+ if self < 0 then return -(-self).gcd(o)
+ if o < 0 then return -(self.gcd(-o))
+ if self == 0 or o == self then return o
+ if o == 0 then return self
+ if self.bin_and(1) == 0 then
+ if o.bin_and(1) == 1 then
+ return self.rshift(1).gcd(o)
+ else
+ return self.rshift(1).gcd(o.rshift(1)).lshift(1)
+ end
+ end
+ if o.bin_and(1) == 0 then return self.gcd(o.rshift(1))
+ if self > o then return (self - o).rshift(1).gcd(o)
+ return (o - self).rshift(1).gcd(self)
+ end
end
redef class Float
fun acos: Float is extern "kernel_Float_Float_acos_0"
fun asin: Float is extern "kernel_Float_Float_asin_0"
fun atan: Float is extern "kernel_Float_Float_atan_0"
- fun abs: Float `{ return abs(recv); `}
+ fun abs: Float `{ return fabs(recv); `}
fun pow(e: Float): Float is extern "kernel_Float_Float_pow_1"
fun log: Float is extern "kernel_Float_Float_log_0"
fun exp: Float is extern "kernel_Float_Float_exp_0"
+
+ # assert 1.1.ceil == 2.0
+ # assert 1.9.ceil == 2.0
+ # assert 2.0.ceil == 2.0
+ # assert (-1.5).ceil == -1.0
+ fun ceil: Float `{ return ceil(recv); `}
+
+ # assert 1.1.floor == 1.0
+ # assert 1.9.floor == 1.0
+ # assert 2.0.floor == 2.0
+ # assert (-1.5).floor == -2.0
+ fun floor: Float `{ return floor(recv); `}
+ # Returns a random `Float` in `[0.0 .. self[`.
fun rand: Float is extern "kernel_Float_Float_rand_0"
fun hypot_with( b : Float ) : Float is extern "hypotf"
+
+ fun is_nan: Bool is extern "isnan"
+
+ # Is the float an infinite value
+ # this function returns:
+ #
+ # * 1 if self is positive infinity
+ # * -1 if self is negative infinity
+ # * 0 otherwise
+ fun is_inf: Int do
+ if is_inf_extern then
+ if self < 0.0 then return -1
+ return 1
+ end
+ return 0
+ end
+
+ private fun is_inf_extern: Bool is extern "isinf"
end
redef class Collection[ E ]