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Mojo trait

Roundable

The Roundable trait describes a type that defines a rounding operation.

Types that conform to Roundable will work with the builtin round function. The round operation always returns the same type as the input.

For example:

@value
struct Complex(Roundable):
    var re: Float64
    var im: Float64

    fn __round__(self) -> Self:
        return Self(round(self.re), round(self.im))

    fn __round__(self, ndigits: Int) -> Self:
        return Self(round(self.re, ndigits), round(self.im, ndigits))
@value
struct Complex(Roundable):
    var re: Float64
    var im: Float64

    fn __round__(self) -> Self:
        return Self(round(self.re), round(self.im))

    fn __round__(self, ndigits: Int) -> Self:
        return Self(round(self.re, ndigits), round(self.im, ndigits))

Implemented traits​

AnyType, UnknownDestructibility

Methods​

__round__​

__round__(self: _Self) -> _Self

Get a rounded value for the type.

Returns:

The rounded value.

__round__(self: _Self, ndigits: Int) -> _Self

Get a rounded value for the type.

Args:

  • ​ndigits (Int): Number of digits after the decimal point.

Returns:

The rounded value.