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// Basic test for free regions in the NLL code. This test ought to
// report an error due to a reborrowing constraint. Right now, we get
// a variety of errors from the older, AST-based machinery (notably
// borrowck), and then we get the NLL error at the end.
struct Map {
}
impl Map {
fn get(&self) -> Option<&String> { None }
fn set(&mut self, v: String) { }
}
fn ok(map: &mut Map) -> &String {
loop {
match map.get() {
Some(v) => {
return v;
}
None => {
map.set(String::new()); // Ideally, this would not error.
//~^ ERROR borrowed as immutable
}
}
}
}
fn err(map: &mut Map) -> &String {
loop {
match map.get() {
Some(v) => {
map.set(String::new()); // Both AST and MIR error here
//~^ ERROR borrowed as immutable
return v;
}
None => {
map.set(String::new()); // Ideally, just AST would error here
//~^ ERROR borrowed as immutable
}
}
}
}
fn main() { }
|
