91b9ffeab0
In `report_fullfillment_errors` push back `T: Sized`, `T: WellFormed` and coercion errors to the end of the list. The pre-existing deduplication logic eliminates redundant errors better that way, keeping the resulting output with fewer errors than before, while also having more detail.
59 lines
1.4 KiB
Rust
59 lines
1.4 KiB
Rust
use std::ops::{Deref, DerefMut};
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struct Thing;
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trait Method<T> {
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fn method(&self) -> T;
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fn mut_method(&mut self) -> T;
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}
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impl Method<i32> for Thing {
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fn method(&self) -> i32 { 0 }
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fn mut_method(&mut self) -> i32 { 0 }
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}
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impl Method<u32> for Thing {
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fn method(&self) -> u32 { 0 }
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fn mut_method(&mut self) -> u32 { 0 }
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}
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trait MethodRef<T> {
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fn by_self(self);
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}
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impl MethodRef<i32> for &Thing {
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fn by_self(self) {}
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}
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impl MethodRef<u32> for &Thing {
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fn by_self(self) {}
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}
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struct DerefsTo<T>(T);
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impl<T> Deref for DerefsTo<T> {
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type Target = T;
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fn deref(&self) -> &Self::Target {
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&self.0
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}
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}
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impl<T> DerefMut for DerefsTo<T> {
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fn deref_mut(&mut self) -> &mut Self::Target {
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&mut self.0
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}
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}
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fn main() {
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let mut thing = Thing;
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thing.method(); //~ ERROR type annotations needed
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thing.mut_method(); //~ ERROR type annotations needed
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thing.by_self(); //~ ERROR type annotations needed
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let mut deref_to = DerefsTo(Thing);
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deref_to.method(); //~ ERROR type annotations needed
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deref_to.mut_method(); //~ ERROR type annotations needed
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deref_to.by_self(); //~ ERROR type annotations needed
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let mut deref_deref_to = DerefsTo(DerefsTo(Thing));
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deref_deref_to.method(); //~ ERROR type annotations needed
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deref_deref_to.mut_method(); //~ ERROR type annotations needed
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deref_deref_to.by_self(); //~ ERROR type annotations needed
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}
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