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