Tweak wording of non-const traits used as const bounds
Use verbose suggestions and add additional labels/notes. Add more test cases for stable/nightly and feature enabled/disabled.
This commit is contained in:
Esteban Küber
parent
f6cb952dc1
commit
4007fc9a0f
49 changed files with 1121 additions and 194 deletions
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error: `~const` is not allowed here
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--> const-super-trait.rs:7:12
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LL | trait Bar: ~const Foo {}
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| ^^^^^^
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note: this trait is not a `#[const_trait]`, so it cannot have `~const` trait bounds
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--> const-super-trait.rs:7:1
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LL | trait Bar: ~const Foo {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error[E0658]: const trait impls are experimental
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--> const-super-trait.rs:7:12
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LL | trait Bar: ~const Foo {}
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| ^^^^^^
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= note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information
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= help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error[E0658]: const trait impls are experimental
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--> const-super-trait.rs:9:17
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LL | const fn foo<T: ~const Bar>(x: &T) {
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| ^^^^^^
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= note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information
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= help: add `#![feature(const_trait_impl)]` to the crate attributes to enable
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= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:7:12
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LL | trait Bar: ~const Foo {}
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| ^^^^^^ can't be applied to `Foo`
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help: enable `#![feature(const_trait_impl)]` in your crate and mark `Foo` as `#[const_trait]` to allow it to have `const` implementations
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LL | #[const_trait] trait Foo {
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| ++++++++++++++
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:9:17
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LL | const fn foo<T: ~const Bar>(x: &T) {
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| ^^^^^^ can't be applied to `Bar`
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help: enable `#![feature(const_trait_impl)]` in your crate and mark `Bar` as `#[const_trait]` to allow it to have `const` implementations
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LL | #[const_trait] trait Bar: ~const Foo {}
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| ++++++++++++++
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error[E0015]: cannot call non-const fn `<T as Foo>::a` in constant functions
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--> const-super-trait.rs:10:7
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LL | x.a();
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| ^^^
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= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
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error: aborting due to 6 previous errors
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Some errors have detailed explanations: E0015, E0658.
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For more information about an error, try `rustc --explain E0015`.
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@ -0,0 +1,45 @@
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error: `~const` is not allowed here
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--> const-super-trait.rs:7:12
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LL | trait Bar: ~const Foo {}
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| ^^^^^^
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note: this trait is not a `#[const_trait]`, so it cannot have `~const` trait bounds
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--> const-super-trait.rs:7:1
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LL | trait Bar: ~const Foo {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:7:12
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LL | trait Bar: ~const Foo {}
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| ^^^^^^ can't be applied to `Foo`
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help: mark `Foo` as `#[const_trait]` to allow it to have `const` implementations
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LL | #[const_trait] trait Foo {
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| ++++++++++++++
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:9:17
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LL | const fn foo<T: ~const Bar>(x: &T) {
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| ^^^^^^ can't be applied to `Bar`
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help: mark `Bar` as `#[const_trait]` to allow it to have `const` implementations
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LL | #[const_trait] trait Bar: ~const Foo {}
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| ++++++++++++++
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error[E0015]: cannot call non-const fn `<T as Foo>::a` in constant functions
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--> const-super-trait.rs:10:7
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LL | x.a();
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| ^^^
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= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
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error: aborting due to 4 previous errors
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For more information about this error, try `rustc --explain E0015`.
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@ -0,0 +1,64 @@
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error: `~const` is not allowed here
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--> const-super-trait.rs:7:12
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7 | trait Bar: ~const Foo {}
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| ^^^^^^
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note: this trait is not a `#[const_trait]`, so it cannot have `~const` trait bounds
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--> const-super-trait.rs:7:1
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7 | trait Bar: ~const Foo {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error[E0658]: const trait impls are experimental
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--> const-super-trait.rs:7:12
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7 | trait Bar: ~const Foo {}
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| ^^^^^^
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= note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information
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error[E0658]: const trait impls are experimental
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--> const-super-trait.rs:9:17
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9 | const fn foo<T: ~const Bar>(x: &T) {
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| ^^^^^^
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= note: see issue #67792 <https://github.com/rust-lang/rust/issues/67792> for more information
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:7:12
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7 | trait Bar: ~const Foo {}
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| ^^^^^^ can't be applied to `Foo`
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note: `Foo` can't be used with `~const` because it isn't annotated with `#[const_trait]`
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--> const-super-trait.rs:3:1
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3 | trait Foo {
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| ^^^^^^^^^
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:9:17
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9 | const fn foo<T: ~const Bar>(x: &T) {
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| ^^^^^^ can't be applied to `Bar`
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note: `Bar` can't be used with `~const` because it isn't annotated with `#[const_trait]`
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--> const-super-trait.rs:7:1
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7 | trait Bar: ~const Foo {}
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| ^^^^^^^^^^^^^^^^^^^^^
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error[E0015]: cannot call non-const fn `<T as Foo>::a` in constant functions
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--> const-super-trait.rs:10:7
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10 | x.a();
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| ^^^
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= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
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error: aborting due to 6 previous errors
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Some errors have detailed explanations: E0015, E0658.
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For more information about an error, try `rustc --explain E0015`.
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@ -0,0 +1,54 @@
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error: `~const` is not allowed here
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--> const-super-trait.rs:7:12
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7 | trait Bar: ~const Foo {}
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| ^^^^^^
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note: this trait is not a `#[const_trait]`, so it cannot have `~const` trait bounds
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--> const-super-trait.rs:7:1
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7 | trait Bar: ~const Foo {}
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| ^^^^^^^^^^^^^^^^^^^^^^^^
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error[E0554]: `#![feature]` may not be used on the NIGHTLY release channel
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--> const-super-trait.rs:1:30
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1 | #![cfg_attr(feature_enabled, feature(const_trait_impl))]
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| ^^^^^^^^^^^^^^^^^^^^^^^^^
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:7:12
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7 | trait Bar: ~const Foo {}
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| ^^^^^^ can't be applied to `Foo`
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note: `Foo` can't be used with `~const` because it isn't annotated with `#[const_trait]`
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--> const-super-trait.rs:3:1
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3 | trait Foo {
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| ^^^^^^^^^
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error: `~const` can only be applied to `#[const_trait]` traits
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--> const-super-trait.rs:9:17
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9 | const fn foo<T: ~const Bar>(x: &T) {
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| ^^^^^^ can't be applied to `Bar`
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note: `Bar` can't be used with `~const` because it isn't annotated with `#[const_trait]`
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--> const-super-trait.rs:7:1
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7 | trait Bar: ~const Foo {}
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| ^^^^^^^^^^^^^^^^^^^^^
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error[E0015]: cannot call non-const fn `<T as Foo>::a` in constant functions
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--> const-super-trait.rs:10:7
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10 | x.a();
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| ^^^
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= note: calls in constant functions are limited to constant functions, tuple structs and tuple variants
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error: aborting due to 5 previous errors
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Some errors have detailed explanations: E0015, E0554.
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For more information about an error, try `rustc --explain E0015`.
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@ -0,0 +1,13 @@
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#![cfg_attr(feature_enabled, feature(const_trait_impl))]
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trait Foo {
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fn a(&self);
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}
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trait Bar: ~const Foo {}
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const fn foo<T: ~const Bar>(x: &T) {
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x.a();
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}
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fn main() {}
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59
tests/run-make/const-trait-stable-toolchain/rmake.rs
Normal file
59
tests/run-make/const-trait-stable-toolchain/rmake.rs
Normal file
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@ -0,0 +1,59 @@
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// Test output of const super trait errors in both stable and nightly.
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// We don't want to provide suggestions on stable that only make sense in nightly.
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use run_make_support::{diff, rustc};
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fn main() {
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let out = rustc()
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.input("const-super-trait.rs")
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.env("RUSTC_BOOTSTRAP", "-1")
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.cfg("feature_enabled")
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.run_fail()
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.assert_stderr_not_contains(
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"as `#[const_trait]` to allow it to have `const` implementations",
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)
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.stderr_utf8();
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diff()
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.expected_file("const-super-trait-stable-enabled.stderr")
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.normalize(
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"may not be used on the .* release channel",
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"may not be used on the NIGHTLY release channel",
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)
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.actual_text("(rustc)", &out)
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.run();
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let out = rustc()
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.input("const-super-trait.rs")
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.cfg("feature_enabled")
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.ui_testing()
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.run_fail()
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.assert_stderr_not_contains("enable `#![feature(const_trait_impl)]` in your crate and mark")
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.assert_stderr_contains("as `#[const_trait]` to allow it to have `const` implementations")
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.stderr_utf8();
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diff()
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.expected_file("const-super-trait-nightly-enabled.stderr")
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.actual_text("(rustc)", &out)
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.run();
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let out = rustc()
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.input("const-super-trait.rs")
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.env("RUSTC_BOOTSTRAP", "-1")
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.run_fail()
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.assert_stderr_not_contains("enable `#![feature(const_trait_impl)]` in your crate and mark")
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.assert_stderr_not_contains(
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"as `#[const_trait]` to allow it to have `const` implementations",
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)
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.stderr_utf8();
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diff()
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.expected_file("const-super-trait-stable-disabled.stderr")
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.actual_text("(rustc)", &out)
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.run();
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let out = rustc()
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.input("const-super-trait.rs")
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.ui_testing()
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.run_fail()
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.assert_stderr_contains("enable `#![feature(const_trait_impl)]` in your crate and mark")
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.stderr_utf8();
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diff()
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.expected_file("const-super-trait-nightly-disabled.stderr")
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.actual_text("(rustc)", &out)
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.run();
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}
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