From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/suggestions/as-ref.rs | 27 +++++++++++++++++++++++++++ 1 file changed, 27 insertions(+) create mode 100644 tests/ui/suggestions/as-ref.rs (limited to 'tests/ui/suggestions/as-ref.rs') diff --git a/tests/ui/suggestions/as-ref.rs b/tests/ui/suggestions/as-ref.rs new file mode 100644 index 000000000..a05353441 --- /dev/null +++ b/tests/ui/suggestions/as-ref.rs @@ -0,0 +1,27 @@ +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 = &Some(3); + let y: Option<&usize> = x; //~ ERROR mismatched types [E0308] + let x: &Result = &Ok(3); + let y: Result<&usize, &usize> = x; + //~^ ERROR mismatched types [E0308] + // note: do not suggest because of `E: usize` + let x: &Result = &Ok(3); + let y: Result<&usize, usize> = x; //~ ERROR mismatched types [E0308] + + let multiple_ref_opt = &&Some(Foo); + multiple_ref_opt.map(|arg| takes_ref(arg)); //~ ERROR mismatched types [E0308] + multiple_ref_opt.and_then(|arg| Some(takes_ref(arg))); //~ ERROR mismatched types [E0308] + let multiple_ref_result = &&Ok(Foo); + multiple_ref_result.map(|arg| takes_ref(arg)); //~ ERROR mismatched types [E0308] + multiple_ref_result.and_then(|arg| Ok(takes_ref(arg))); //~ ERROR mismatched types [E0308] +} -- cgit v1.2.3