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use heapsize::HeapSize;
#[derive(HeapSize)]
struct Demo<'a, T: ?Sized> {
a: Box<T>,
b: u8,
c: &'a str,
d: String,
}
fn main() {
let demo = Demo {
a: b"bytestring".to_vec().into_boxed_slice(),
b: 255,
c: "&'static str",
d: "String".to_owned(),
};
// 10 + 0 + 0 + 6 = 16
println!(
"heap size = {} + {} + {} + {} = {}",
demo.a.heap_size_of_children(),
demo.b.heap_size_of_children(),
demo.c.heap_size_of_children(),
demo.d.heap_size_of_children(),
demo.heap_size_of_children()
);
}
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