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use super::DataSize;
use core::mem::size_of;
impl<A> DataSize for smallvec::SmallVec<A>
where
A: smallvec::Array,
A::Item: DataSize,
{
const IS_DYNAMIC: bool = true;
const STATIC_HEAP_SIZE: usize = 0;
#[inline]
fn estimate_heap_size(&self) -> usize {
if !self.spilled() {
return 0;
}
let sz_base = self.capacity() * size_of::<A::Item>();
let sz_used = if A::Item::IS_DYNAMIC {
self.iter().map(DataSize::estimate_heap_size).sum()
} else {
self.len() * A::Item::STATIC_HEAP_SIZE
};
sz_base + sz_used
}
}