Struct IterSizeHint 

#[repr(C)]
pub struct IterSizeHint {
    pub lower: usize,
    pub upper: usize,
    pub has_upper: bool,
}

Return the lower and upper bounds of the iterator, if known.

Safety

The iter parameter must point to aligned, initialized memory of the correct type.

Fields

lower: usize

Lower bound on remaining items.

upper: usize

Upper bound on remaining items when has_upper is true.

has_upper: bool

Whether upper contains a real upper bound.

Trait Implementations

impl Clone for IterSizeHint

fn clone(&self) -> IterSizeHint

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for IterSizeHint

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

Formats the value using the given formatter.

impl Copy for IterSizeHint