fbef241709
E.g. `fn foo() { foo() }`, or, more subtlely
impl Foo for Box<Foo+'static> {
fn bar(&self) {
self.bar();
}
}
The compiler will warn and point out the points where recursion occurs,
if it determines that the function cannot return without calling itself.
Closes #17899.
67 lines
1.6 KiB
Rust
67 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.
|
|
|
|
#![deny(unconditional_recursion)]
|
|
#![allow(dead_code)]
|
|
fn foo() { //~ ERROR function cannot return without recurring
|
|
foo(); //~ NOTE recursive call site
|
|
}
|
|
|
|
fn bar() {
|
|
if true {
|
|
bar()
|
|
}
|
|
}
|
|
|
|
fn baz() { //~ ERROR function cannot return without recurring
|
|
if true {
|
|
baz() //~ NOTE recursive call site
|
|
} else {
|
|
baz() //~ NOTE recursive call site
|
|
}
|
|
}
|
|
|
|
fn qux() {
|
|
loop {}
|
|
}
|
|
|
|
fn quz() -> bool { //~ ERROR function cannot return without recurring
|
|
if true {
|
|
while quz() {} //~ NOTE recursive call site
|
|
true
|
|
} else {
|
|
loop { quz(); } //~ NOTE recursive call site
|
|
}
|
|
}
|
|
|
|
trait Foo {
|
|
fn bar(&self) { //~ ERROR function cannot return without recurring
|
|
self.bar() //~ NOTE recursive call site
|
|
}
|
|
}
|
|
|
|
impl Foo for Box<Foo+'static> {
|
|
fn bar(&self) { //~ ERROR function cannot return without recurring
|
|
loop {
|
|
self.bar() //~ NOTE recursive call site
|
|
}
|
|
}
|
|
|
|
}
|
|
|
|
struct Baz;
|
|
impl Baz {
|
|
fn qux(&self) { //~ ERROR function cannot return without recurring
|
|
self.qux(); //~ NOTE recursive call site
|
|
}
|
|
}
|
|
|
|
fn main() {}
|