diff options
Diffstat (limited to 'src/test/ui/trait-bounds')
4 files changed, 118 insertions, 0 deletions
diff --git a/src/test/ui/trait-bounds/impl-bound-with-references-error.rs b/src/test/ui/trait-bounds/impl-bound-with-references-error.rs new file mode 100644 index 000000000..e5d0a1aae --- /dev/null +++ b/src/test/ui/trait-bounds/impl-bound-with-references-error.rs @@ -0,0 +1,20 @@ +// Regression test for #105138. +// This test ensures that the compiler does not add note +// for implementation of trait whose inner type is erroneous. + +pub enum LabelText { + Plain, +} + +impl<T> From<T> for LabelText +//~^ ERROR conflicting implementations of trait `From<LabelText>` for type `LabelText` [E0119] +where + T: Into<Cow<'static, str>>, + //~^ ERROR cannot find type `Cow` in this scope [E0412] +{ + fn from(text: T) -> Self { + LabelText::Plain(text.into()) + } +} + +fn main() {} diff --git a/src/test/ui/trait-bounds/impl-bound-with-references-error.stderr b/src/test/ui/trait-bounds/impl-bound-with-references-error.stderr new file mode 100644 index 000000000..95fd6bd50 --- /dev/null +++ b/src/test/ui/trait-bounds/impl-bound-with-references-error.stderr @@ -0,0 +1,24 @@ +error[E0412]: cannot find type `Cow` in this scope + --> $DIR/impl-bound-with-references-error.rs:12:13 + | +LL | T: Into<Cow<'static, str>>, + | ^^^ not found in this scope + | +help: consider importing this enum + | +LL | use std::borrow::Cow; + | + +error[E0119]: conflicting implementations of trait `From<LabelText>` for type `LabelText` + --> $DIR/impl-bound-with-references-error.rs:9:1 + | +LL | impl<T> From<T> for LabelText + | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ + | + = note: conflicting implementation in crate `core`: + - impl<T> From<T> for T; + +error: aborting due to 2 previous errors + +Some errors have detailed explanations: E0119, E0412. +For more information about an error, try `rustc --explain E0119`. diff --git a/src/test/ui/trait-bounds/impl-missing-where-clause-lifetimes-from-trait.rs b/src/test/ui/trait-bounds/impl-missing-where-clause-lifetimes-from-trait.rs new file mode 100644 index 000000000..dcdbd0228 --- /dev/null +++ b/src/test/ui/trait-bounds/impl-missing-where-clause-lifetimes-from-trait.rs @@ -0,0 +1,38 @@ +trait Trait<T> { + fn foo<'a, K>(self, _: T, _: K) where T: 'a, K: 'a; +} + +impl Trait<()> for () { + fn foo<'a, K>(self, _: (), _: K) where { //~ ERROR E0195 + todo!(); + } +} + +struct State; + +trait Foo<T> { + fn foo<'a>(&self, state: &'a State) -> &'a T + where + T: 'a; +} + +impl<F, T> Foo<T> for F +where + F: Fn(&State) -> &T, +{ + fn foo<'a>(&self, state: &'a State) -> &'a T { //~ ERROR E0195 + self(state) + } +} + +trait Bar { + fn foo<'a>(&'a self) {} +} + +impl Bar for () { + fn foo<'a: 'a>(&'a self) {} //~ ERROR E0195 +} + +fn main() { + ().foo((), ()); +} diff --git a/src/test/ui/trait-bounds/impl-missing-where-clause-lifetimes-from-trait.stderr b/src/test/ui/trait-bounds/impl-missing-where-clause-lifetimes-from-trait.stderr new file mode 100644 index 000000000..e26cb2216 --- /dev/null +++ b/src/test/ui/trait-bounds/impl-missing-where-clause-lifetimes-from-trait.stderr @@ -0,0 +1,36 @@ +error[E0195]: lifetime parameters or bounds on method `foo` do not match the trait declaration + --> $DIR/impl-missing-where-clause-lifetimes-from-trait.rs:6:11 + | +LL | fn foo<'a, K>(self, _: T, _: K) where T: 'a, K: 'a; + | ------- -- -- this bound might be missing in the impl + | | | + | | this bound might be missing in the impl + | lifetimes in impl do not match this method in trait +... +LL | fn foo<'a, K>(self, _: (), _: K) where { + | ^^^^^^^ lifetimes do not match method in trait + +error[E0195]: lifetime parameters or bounds on method `foo` do not match the trait declaration + --> $DIR/impl-missing-where-clause-lifetimes-from-trait.rs:23:11 + | +LL | fn foo<'a>(&self, state: &'a State) -> &'a T + | ---- lifetimes in impl do not match this method in trait +LL | where +LL | T: 'a; + | -- this bound might be missing in the impl +... +LL | fn foo<'a>(&self, state: &'a State) -> &'a T { + | ^^^^ lifetimes do not match method in trait + +error[E0195]: lifetime parameters or bounds on method `foo` do not match the trait declaration + --> $DIR/impl-missing-where-clause-lifetimes-from-trait.rs:33:11 + | +LL | fn foo<'a>(&'a self) {} + | ---- lifetimes in impl do not match this method in trait +... +LL | fn foo<'a: 'a>(&'a self) {} + | ^^^^^^^^ lifetimes do not match method in trait + +error: aborting due to 3 previous errors + +For more information about this error, try `rustc --explain E0195`. |