ec7c800d2f
This commit removes pretty-expanded from all tests that wind up calling panic! one way or another now that its internals are unstable.
71 lines
2.6 KiB
Rust
71 lines
2.6 KiB
Rust
// Copyright 2014 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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#![feature(core)]
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extern crate core;
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use core::nonzero::NonZero;
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use std::mem::size_of;
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use std::rc::Rc;
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use std::sync::Arc;
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trait Trait { fn dummy(&self) { } }
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fn main() {
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// Functions
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assert_eq!(size_of::<fn(isize)>(), size_of::<Option<fn(isize)>>());
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assert_eq!(size_of::<extern "C" fn(isize)>(), size_of::<Option<extern "C" fn(isize)>>());
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// Slices - &str / &[T] / &mut [T]
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assert_eq!(size_of::<&str>(), size_of::<Option<&str>>());
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assert_eq!(size_of::<&[isize]>(), size_of::<Option<&[isize]>>());
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assert_eq!(size_of::<&mut [isize]>(), size_of::<Option<&mut [isize]>>());
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// Traits - Box<Trait> / &Trait / &mut Trait
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assert_eq!(size_of::<Box<Trait>>(), size_of::<Option<Box<Trait>>>());
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assert_eq!(size_of::<&Trait>(), size_of::<Option<&Trait>>());
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assert_eq!(size_of::<&mut Trait>(), size_of::<Option<&mut Trait>>());
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// Pointers - Box<T>
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assert_eq!(size_of::<Box<isize>>(), size_of::<Option<Box<isize>>>());
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// The optimization can't apply to raw pointers
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assert!(size_of::<Option<*const isize>>() != size_of::<*const isize>());
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assert!(Some(0 as *const isize).is_some()); // Can't collapse None to null
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struct Foo {
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_a: Box<isize>
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}
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struct Bar(Box<isize>);
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// Should apply through structs
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assert_eq!(size_of::<Foo>(), size_of::<Option<Foo>>());
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assert_eq!(size_of::<Bar>(), size_of::<Option<Bar>>());
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// and tuples
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assert_eq!(size_of::<(u8, Box<isize>)>(), size_of::<Option<(u8, Box<isize>)>>());
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// and fixed-size arrays
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assert_eq!(size_of::<[Box<isize>; 1]>(), size_of::<Option<[Box<isize>; 1]>>());
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// Should apply to NonZero
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assert_eq!(size_of::<NonZero<usize>>(), size_of::<Option<NonZero<usize>>>());
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assert_eq!(size_of::<NonZero<*mut i8>>(), size_of::<Option<NonZero<*mut i8>>>());
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// Should apply to types that use NonZero internally
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assert_eq!(size_of::<Vec<isize>>(), size_of::<Option<Vec<isize>>>());
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assert_eq!(size_of::<Arc<isize>>(), size_of::<Option<Arc<isize>>>());
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assert_eq!(size_of::<Rc<isize>>(), size_of::<Option<Rc<isize>>>());
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// Should apply to types that have NonZero transitively
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assert_eq!(size_of::<String>(), size_of::<Option<String>>());
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}
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