| // Copyright 2014 The Rust Project Developers. See the COPYRIGHT |
| // file at the top-level directory of this distribution and at |
| // http://rust-lang.org/COPYRIGHT. |
| // |
| // Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or |
| // http://www.apache.org/licenses/LICENSE-2.0> or the MIT license |
| // <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your |
| // option. This file may not be copied, modified, or distributed |
| // except according to those terms. |
| |
| // Test that type IDs correctly account for higher-rank lifetimes |
| // Also acts as a regression test for an ICE (issue #19791) |
| |
| |
| #![feature(core)] |
| |
| use std::any::{Any, TypeId}; |
| |
| fn main() { |
| // Bare fns |
| { |
| let a = TypeId::of::<fn(&'static isize, &'static isize)>(); |
| let b = TypeId::of::<for<'a> fn(&'static isize, &'a isize)>(); |
| let c = TypeId::of::<for<'a, 'b> fn(&'a isize, &'b isize)>(); |
| let d = TypeId::of::<for<'a, 'b> fn(&'b isize, &'a isize)>(); |
| assert!(a != b); |
| assert!(a != c); |
| assert!(a != d); |
| assert!(b != c); |
| assert!(b != d); |
| assert_eq!(c, d); |
| |
| // Make sure De Bruijn indices are handled correctly |
| let e = TypeId::of::<for<'a> fn(fn(&'a isize) -> &'a isize)>(); |
| let f = TypeId::of::<fn(for<'a> fn(&'a isize) -> &'a isize)>(); |
| assert!(e != f); |
| } |
| // Boxed unboxed closures |
| { |
| let a = TypeId::of::<Box<Fn(&'static isize, &'static isize)>>(); |
| let b = TypeId::of::<Box<for<'a> Fn(&'static isize, &'a isize)>>(); |
| let c = TypeId::of::<Box<for<'a, 'b> Fn(&'a isize, &'b isize)>>(); |
| let d = TypeId::of::<Box<for<'a, 'b> Fn(&'b isize, &'a isize)>>(); |
| assert!(a != b); |
| assert!(a != c); |
| assert!(a != d); |
| assert!(b != c); |
| assert!(b != d); |
| assert_eq!(c, d); |
| |
| // Make sure De Bruijn indices are handled correctly |
| let e = TypeId::of::<Box<for<'a> Fn(Box<Fn(&'a isize) -> &'a isize>)>>(); |
| let f = TypeId::of::<Box<Fn(Box<for<'a> Fn(&'a isize) -> &'a isize>)>>(); |
| assert!(e != f); |
| } |
| // Raw unboxed closures |
| // Note that every unboxed closure has its own anonymous type, |
| // so no two IDs should equal each other, even when compatible |
| { |
| let a = id(|_: &isize, _: &isize| {}); |
| let b = id(|_: &isize, _: &isize| {}); |
| assert!(a != b); |
| } |
| |
| fn id<T:Any>(_: T) -> TypeId { |
| TypeId::of::<T>() |
| } |
| } |