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#[allow(deprecated)]
use crate::Ops;
#[deprecated(note="for internal use only")]
#[allow(deprecated)]
pub trait RangeType<U>: Ops where U: Ops {
fn estimate_size(&self, other: Self) -> U;
}
macro_rules! impl_range_type_for_signed_integers {
($($signed: ty, $unsigned: ty,)+) => {
$(
#[allow(deprecated)]
impl RangeType<$unsigned> for $signed {
fn estimate_size(&self, other: Self) -> $unsigned {
if self == &other {
return 1;
}
let min = (*self).min(other);
let max = (*self).max(other);
let tmp = match min >= 0 && max >= 0 {
true => max as $unsigned - min as $unsigned,
false => {
let tmp = match min == Self::min_value() {
true => Self::max_value() as $unsigned + 1,
false => min.abs() as $unsigned,
};
match min < 0 && max < 0 {
true => tmp - max.abs() as $unsigned,
false => tmp + max as $unsigned,
}
},
};
tmp.saturating_add(1)
}
}
)+
};
}
impl_range_type_for_signed_integers! {
i8, u8,
i16, u16,
i32, u32,
i64, u64,
i128, u128,
isize, usize,
}
macro_rules! impl_range_type_for_unsigned_integers {
($($unsigned: ty,)+) => {
$(
#[allow(deprecated)]
impl RangeType<$unsigned> for $unsigned {
fn estimate_size(&self, other: Self) -> $unsigned {
match self == &other {
true => 1,
false => ((*self).max(other) - (*self).min(other)).saturating_add(1),
}
}
}
)+
};
}
impl_range_type_for_unsigned_integers! {
u8, u16, u32, u64, u128, usize,
}