Enum Integral 

pub enum Integral {
    TowardZero,
    Upward,
    Downward,
    NearestTiesAway,
}

Which integer a value is taken to, for Float::to_integral.

The four are C’s trunc, ceil, floor and round, and they are the four of that family whose answer does not depend on the rounding mode the program is running under. rint and nearbyint are the two that do, and there is no variant for them here: a compiler that folded one would be answering for a mode it cannot know, which is why gcc will not fold one either and says so by refusing static double x = __builtin_rint(2.5); as not a constant.

Variants

TowardZero

Toward zero, which drops the fraction and keeps the sign. C’s trunc.

Upward

Toward positive infinity. C’s ceil.

Downward

Toward negative infinity. C’s floor.

NearestTiesAway

To the nearest, with a half going away from zero rather than to even. C’s round, and the one place in C where a tie does not go to even.

Trait Implementations

impl Clone for Integral

fn clone(&self) -> Integral

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for Integral

impl Debug for Integral

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for Integral

impl PartialEq for Integral

fn eq(&self, other: &Integral) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Integral