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// 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.
struct Fat<Sized? T> {
f1: int,
f2: &'static str,
ptr: T
}
// x is a fat pointer
fn foo(x: &Fat<[int]>) {
let y = &x.ptr;
assert!(x.ptr.len() == 3);
assert!(y[0] == 1);
assert!(x.ptr[1] == 2);
assert!(x.f1 == 5);
assert!(x.f2 == "some str");
}
fn foo2<T:ToBar>(x: &Fat<[T]>) {
let y = &x.ptr;
let bar = Bar;
assert!(x.ptr.len() == 3);
assert!(y[0].to_bar() == bar);
assert!(x.ptr[1].to_bar() == bar);
assert!(x.f1 == 5);
assert!(x.f2 == "some str");
}
fn foo3(x: &Fat<Fat<[int]>>) {
let y = &x.ptr.ptr;
assert!(x.f1 == 5);
assert!(x.f2 == "some str");
assert!(x.ptr.f1 == 8);
assert!(x.ptr.f2 == "deep str");
assert!(x.ptr.ptr.len() == 3);
assert!(y[0] == 1);
assert!(x.ptr.ptr[1] == 2);
}
#[deriving(PartialEq,Eq)]
struct Bar;
trait ToBar {
fn to_bar(&self) -> Bar;
}
impl ToBar for Bar {
fn to_bar(&self) -> Bar {
*self
}
}
pub fn main() {
// With a vec of ints.
let f1 = Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
foo(&f1);
let f2 = &f1;
foo(f2);
let f3: &Fat<[int]> = f2;
foo(f3);
let f4: &Fat<[int]> = &f1;
foo(f4);
let f5: &Fat<[int]> = &Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
foo(f5);
// With a vec of Bars.
let bar = Bar;
let f1 = Fat { f1: 5, f2: "some str", ptr: [bar, bar, bar] };
foo2(&f1);
let f2 = &f1;
foo2(f2);
let f3: &Fat<[Bar]> = f2;
foo2(f3);
let f4: &Fat<[Bar]> = &f1;
foo2(f4);
let f5: &Fat<[Bar]> = &Fat { f1: 5, f2: "some str", ptr: [bar, bar, bar] };
foo2(f5);
// Assignment.
let f5: &mut Fat<[int]> = &mut Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
f5.ptr[1] = 34;
assert!(f5.ptr[0] == 1);
assert!(f5.ptr[1] == 34);
assert!(f5.ptr[2] == 3);
// Zero size vec.
let f5: &Fat<[int]> = &Fat { f1: 5, f2: "some str", ptr: [] };
assert!(f5.ptr.len() == 0);
let f5: &Fat<[Bar]> = &Fat { f1: 5, f2: "some str", ptr: [] };
assert!(f5.ptr.len() == 0);
// Deeply nested.
let f1 = Fat { f1: 5, f2: "some str", ptr: Fat { f1: 8, f2: "deep str", ptr: [1, 2, 3]} };
foo3(&f1);
let f2 = &f1;
foo3(f2);
let f3: &Fat<Fat<[int]>> = f2;
foo3(f3);
let f4: &Fat<Fat<[int]>> = &f1;
foo3(f4);
let f5: &Fat<Fat<[int]>> =
&Fat { f1: 5, f2: "some str", ptr: Fat { f1: 8, f2: "deep str", ptr: [1, 2, 3]} };
foo3(f5);
// Box.
let f1 = box [1i, 2, 3];
assert!((*f1)[1] == 2);
let f2: Box<[int]> = f1;
assert!((*f2)[1] == 2);
// Nested Box.
let f1 : Box<Fat<[int, ..3]>> = box Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
foo(&*f1);
let f2 : Box<Fat<[int]>> = f1;
foo(&*f2);
let f3 : Box<Fat<[int]>> = box Fat { f1: 5, f2: "some str", ptr: [1, 2, 3] };
foo(&*f3);
}
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