mirror of https://github.com/rust-lang/rust
36 lines
662 B
Rust
36 lines
662 B
Rust
//@ run-pass
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#![allow(dead_code)]
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use std::mem;
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enum E<T> { Thing(isize, T), Nothing((), ((), ()), [i8; 0]) }
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struct S<T>(isize, T);
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// These are macros so we get useful assert messages.
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macro_rules! check_option {
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($T:ty) => {
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assert_eq!(mem::size_of::<Option<$T>>(), mem::size_of::<$T>());
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}
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}
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macro_rules! check_fancy {
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($T:ty) => {
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assert_eq!(mem::size_of::<E<$T>>(), mem::size_of::<S<$T>>());
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}
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}
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macro_rules! check_type {
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($T:ty) => {{
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check_option!($T);
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check_fancy!($T);
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}}
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}
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pub fn main() {
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check_type!(&'static isize);
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check_type!(Box<isize>);
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check_type!(extern "C" fn());
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}
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