signum

Description

@signum(x)

• if x < 0, return -1
• else if x > 0, return 1
• else return 0

Type Rules

bool -> i8
i8   -> i8
i16  -> i8
i32  -> i8
i64  -> i8
f32  -> i8
f64  -> i8
_    -> domain error

Examples

    @signum((-2,0,3):i32)
(-1,0,1):i8