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4b702fa50d
First step of https://bugzilla.mozilla.org/show_bug.cgi?id=1364148 Source-Repo: https://github.com/servo/servo Source-Revision: ababebcced62d3a9bd09f002f1bf27b1b2691ea6 --HG-- rename : servo/components/script_plugins/Cargo.toml => servo/components/size_of_test/Cargo.toml extra : subtree_source : https%3A//hg.mozilla.org/projects/converted-servo-linear extra : subtree_revision : 21e3290fdf61d275d2bef0b0703280d8a8f15937
29 lines
1.1 KiB
Rust
29 lines
1.1 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#[macro_export]
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macro_rules! size_of_test {
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($testname: ident, $t: ty, $expected_size: expr) => {
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#[test]
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fn $testname() {
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let new = ::std::mem::size_of::<$t>();
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let old = $expected_size;
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if new < old {
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panic!(
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"Your changes have decreased the stack size of {} from {} to {}. \
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Good work! Please update the expected size in {}.",
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stringify!($t), old, new, file!()
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)
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} else if new > old {
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panic!(
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"Your changes have increased the stack size of {} from {} to {}. \
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Please consider choosing a design which avoids this increase. \
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If you feel that the increase is necessary, update the size in {}.",
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stringify!($t), old, new, file!()
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)
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}
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}
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}
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}
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