| // Copyright 2012 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 lifetimes are linked properly when we create dependent region pointers. |
| // Issue #3148. |
| |
| |
| #![allow(unknown_features)] |
| #![feature(box_patterns)] |
| #![feature(box_syntax)] |
| |
| struct A { |
| value: B |
| } |
| |
| struct B { |
| v1: isize, |
| v2: [isize; 3], |
| v3: Vec<isize> , |
| v4: C, |
| v5: Box<C>, |
| v6: Option<C> |
| } |
| |
| #[derive(Copy, Clone)] |
| struct C { |
| f: isize |
| } |
| |
| fn get_v1(a: &A) -> &isize { |
| // Region inferencer must deduce that &v < L2 < L1 |
| let foo = &a.value; // L1 |
| &foo.v1 // L2 |
| } |
| |
| fn get_v2(a: &A, i: usize) -> &isize { |
| let foo = &a.value; |
| &foo.v2[i] |
| } |
| |
| fn get_v3(a: &A, i: usize) -> &isize { |
| let foo = &a.value; |
| &foo.v3[i] |
| } |
| |
| fn get_v4(a: &A, _i: usize) -> &isize { |
| let foo = &a.value; |
| &foo.v4.f |
| } |
| |
| fn get_v5(a: &A, _i: usize) -> &isize { |
| let foo = &a.value; |
| &foo.v5.f |
| } |
| |
| fn get_v6_a(a: &A, _i: usize) -> &isize { |
| match a.value.v6 { |
| Some(ref v) => &v.f, |
| None => panic!() |
| } |
| } |
| |
| fn get_v6_b(a: &A, _i: usize) -> &isize { |
| match *a { |
| A { value: B { v6: Some(ref v), .. } } => &v.f, |
| _ => panic!() |
| } |
| } |
| |
| fn get_v6_c(a: &A, _i: usize) -> &isize { |
| match a { |
| &A { value: B { v6: Some(ref v), .. } } => &v.f, |
| _ => panic!() |
| } |
| } |
| |
| fn get_v5_ref(a: &A, _i: usize) -> &isize { |
| match &a.value { |
| &B {v5: box C {f: ref v}, ..} => v |
| } |
| } |
| |
| pub fn main() { |
| let a = A {value: B {v1: 22, |
| v2: [23, 24, 25], |
| v3: vec!(26, 27, 28), |
| v4: C { f: 29 }, |
| v5: box C { f: 30 }, |
| v6: Some(C { f: 31 })}}; |
| |
| let p = get_v1(&a); |
| assert_eq!(*p, a.value.v1); |
| |
| let p = get_v2(&a, 1); |
| assert_eq!(*p, a.value.v2[1]); |
| |
| let p = get_v3(&a, 1); |
| assert_eq!(*p, a.value.v3[1]); |
| |
| let p = get_v4(&a, 1); |
| assert_eq!(*p, a.value.v4.f); |
| |
| let p = get_v5(&a, 1); |
| assert_eq!(*p, a.value.v5.f); |
| |
| let p = get_v6_a(&a, 1); |
| assert_eq!(*p, a.value.v6.unwrap().f); |
| |
| let p = get_v6_b(&a, 1); |
| assert_eq!(*p, a.value.v6.unwrap().f); |
| |
| let p = get_v6_c(&a, 1); |
| assert_eq!(*p, a.value.v6.unwrap().f); |
| |
| let p = get_v5_ref(&a, 1); |
| assert_eq!(*p, a.value.v5.f); |
| } |