a5bb0a3a45
floating point numbers for real.
This will break code that looks like:
let mut x = 0;
while ... {
x += 1;
}
println!("{}", x);
Change that code to:
let mut x = 0i;
while ... {
x += 1;
}
println!("{}", x);
Closes #15201.
[breaking-change]
81 lines
1.6 KiB
Rust
81 lines
1.6 KiB
Rust
// 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.
|
|
|
|
// Tests that two closures cannot simultaneously have mutable
|
|
// and immutable access to the variable. Issue #6801.
|
|
|
|
|
|
fn get(x: &int) -> int {
|
|
*x
|
|
}
|
|
|
|
fn set(x: &mut int) {
|
|
*x = 4;
|
|
}
|
|
|
|
fn a() {
|
|
let mut x = 3i;
|
|
let c1 = || x = 4;
|
|
let c2 = || x * 5; //~ ERROR cannot borrow `x`
|
|
}
|
|
|
|
fn b() {
|
|
let mut x = 3i;
|
|
let c1 = || set(&mut x);
|
|
let c2 = || get(&x); //~ ERROR cannot borrow `x`
|
|
}
|
|
|
|
fn c() {
|
|
let mut x = 3i;
|
|
let c1 = || set(&mut x);
|
|
let c2 = || x * 5; //~ ERROR cannot borrow `x`
|
|
}
|
|
|
|
fn d() {
|
|
let mut x = 3i;
|
|
let c2 = || x * 5;
|
|
x = 5; //~ ERROR cannot assign
|
|
}
|
|
|
|
fn e() {
|
|
let mut x = 3i;
|
|
let c1 = || get(&x);
|
|
x = 5; //~ ERROR cannot assign
|
|
}
|
|
|
|
fn f() {
|
|
let mut x = box 3i;
|
|
let c1 = || get(&*x);
|
|
*x = 5; //~ ERROR cannot assign
|
|
}
|
|
|
|
fn g() {
|
|
struct Foo {
|
|
f: Box<int>
|
|
}
|
|
|
|
let mut x = box Foo { f: box 3 };
|
|
let c1 = || get(&*x.f);
|
|
*x.f = 5; //~ ERROR cannot assign to `*x.f`
|
|
}
|
|
|
|
fn h() {
|
|
struct Foo {
|
|
f: Box<int>
|
|
}
|
|
|
|
let mut x = box Foo { f: box 3 };
|
|
let c1 = || get(&*x.f);
|
|
let c2 = || *x.f = 5; //~ ERROR cannot borrow `x` as mutable
|
|
}
|
|
|
|
fn main() {
|
|
}
|