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Diffstat (limited to '')
-rw-r--r-- | src/test/ui/suggestions/as-ref.rs | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/test/ui/suggestions/as-ref.rs b/src/test/ui/suggestions/as-ref.rs new file mode 100644 index 000000000..46d946153 --- /dev/null +++ b/src/test/ui/suggestions/as-ref.rs @@ -0,0 +1,20 @@ +struct Foo; + +fn takes_ref(_: &Foo) {} + +fn main() { + let ref opt = Some(Foo); + opt.map(|arg| takes_ref(arg)); //~ ERROR mismatched types [E0308] + opt.and_then(|arg| Some(takes_ref(arg))); //~ ERROR mismatched types [E0308] + let ref opt: Result<_, ()> = Ok(Foo); + opt.map(|arg| takes_ref(arg)); //~ ERROR mismatched types [E0308] + opt.and_then(|arg| Ok(takes_ref(arg))); //~ ERROR mismatched types [E0308] + let x: &Option<usize> = &Some(3); + let y: Option<&usize> = x; //~ ERROR mismatched types [E0308] + let x: &Result<usize, usize> = &Ok(3); + let y: Result<&usize, &usize> = x; + //~^ ERROR mismatched types [E0308] + // note: do not suggest because of `E: usize` + let x: &Result<usize, usize> = &Ok(3); + let y: Result<&usize, usize> = x; //~ ERROR mismatched types [E0308] +} |