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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
use dom::characterdata::CharacterData;
use dom::element::Element;
use dom::eventtarget::EventTarget;
use dom::htmldivelement::HTMLDivElement;
use dom::htmlelement::HTMLElement;
use dom::htmlspanelement::HTMLSpanElement;
use dom::node::Node;
use dom::text::Text;
use std::mem::size_of;
// Macro so that we can stringify type names
// I'd really prefer the tests themselves to be run at plugin time,
// however rustc::middle doesn't have access to the full type data
macro_rules! sizeof_checker (
($testname: ident, $t:ty, $known_size:expr) => (
#[test]
fn $testname() {
let new = size_of::<$t>();
let old = $known_size;
if new < old {
panic!("Your changes have decreased the stack size of commonly used DOM struct {} from {} to {}. \
Good work! Please update the size in script/tests.rs",
stringify!($t), old, new)
} else if new > old {
panic!("Your changes have increased the stack size of commonly used DOM struct {} from {} to {}. \
These structs are present in large quantities in the DOM, and increasing the size \
may dramatically affect our memory footprint. Please consider choosing a design which \
avoids this increase. If you feel that the increase is necessary, \
update to the new size in script/tests.rs.",
stringify!($t), old, new)
}
});
);
// Update the sizes here
sizeof_checker!(size_event_target, EventTarget, 48);
sizeof_checker!(size_node, Node, 288);
sizeof_checker!(size_element, Element, 432);
sizeof_checker!(size_htmlelement, HTMLElement, 464);
sizeof_checker!(size_div, HTMLDivElement, 464);
sizeof_checker!(size_span, HTMLSpanElement, 464);
sizeof_checker!(size_text, Text, 320);
sizeof_checker!(size_characterdata, CharacterData, 320);
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